Schneider Electric LUFP7 v2, Profibus DP/Modbus RTU Gateway User Guide

TeSys U LUFP7
Profibus-DP / Modbus RTU Gateway
User’s Manual
1744087
03/2009
www.schneider-electric.com
Schneider Electric assumes no responsibility for any errors that may appear in this document. If you
have any suggestions for improvements or amendments or have found errors in this publication, please
notify us.
No part of this document may be reproduced in any form or by any means, electronic or mechanical,
including photocopying, without express written permission of Schneider Electric.
All pertinent state, regional, and local safety regulations must be observed when installing and using
this product. For reasons of safety and to help ensure compliance with documented system data, only
the manufacturer should perform repairs to components.
When devices are used for applications with technical safety requirements, the relevant instructions
must be followed.
Failure to use Schneider Electric software or approved software with our hardware products may result
in injury, harm, or improper operating results.
Failure to observe this information can result in injury or equipment damage.
© 2009 Schneider Electric. All rights reserved.
2
1744087 03/2009
Table of Contents
Safety Information .....................................................4
1. Introduction............................................................6
1.1. Introduction to the User’s Manual .......................................... 6
1.2. Introduction to the LUFP7 Gateway ....................................... 8
1.3. Terminology............................................................................ 8
1.4. Introduction to the Communication “System” Architecture..... 9
1.5. Principle of Gateway Configuration and Operation .............. 10
2. Hardware Implementation of the LUFP7
Gateway ........................................................... 12
2.1. On Receipt ........................................................................... 12
2.2. Introduction to the LUFP7 Gateway ..................................... 12
2.3. Mounting the Gateway on a DIN Rail ................................... 13
2.4. Powering the Gateway ......................................................... 14
2.5. Connecting the Gateway to the Modbus Network ................ 14
2.5.1. Examples of Modbus Connection .................................. 15
2.5.2. Pin Outs ......................................................................... 17
2.5.3. Wiring Recommendations for the Modbus Network....... 18
2.6. Connecting the LUFP7 gateway to the Profibus-DP
Network................................................................................. 20
2.6.1. Pin Outs ......................................................................... 20
2.6.2. Wiring Recommendations for the Profibus-DP Network 21
2.7. Configuring the Profibus-DP Communication Features ....... 23
2.7.1. Encoding the Gateway Address..................................... 23
2.7.2. No Internal Line Termination.......................................... 24
3. Signaling ............................................................. 25
4. Software Implementation of the Gateway........ 27
4.1. Introduction........................................................................... 27
4.1.1. System Architecture ....................................................... 27
4.1.2. Configuring the Motor Starters ....................................... 28
4.1.3. Modbus Cycle Time ....................................................... 28
4.1.4. Managing Degraded Modes With the Gateway Default
Configuration .................................................................. 28
4.2. Gateway Configuration under PL7 PRO and SyCon ........... 33
4.2.1. Setting Up the Hardware Configuration under
PL7 PRO ........................................................................ 33
4.2.2. Creating a Profibus-DP Network under SyCon.............. 34
4.2.3. Selecting and Adding the Profibus-DP Master Station .. 34
4.2.4. Setting up the Gateway Description Files ...................... 35
4.2.5. Selecting and Adding the Gateway to the Profibus-DP
Network .......................................................................... 36
4.2.6. Editing and Configuring the Gateway ............................ 36
4.2.7. Saving and Exporting the Profibus-DP Network
Configuration .................................................................. 38
4.2.8. Importing the Configuration of the Profibus-DP
Network under PL7 PRO ................................................ 38
4.2.9. Configuring the Gateway I/O under PL7 PRO ............... 39
4.2.10. Validating and Saving the Configuration of the
TSX PBY 100 Coupler.................................................... 41
4.2.11. Allocating Symbols to the Gateway Inputs and
Outputs ........................................................................... 41
4.2.12. Using and Monitoring the TSX PBY 100 Coupler
Configuration .................................................................. 42
4.2.13. Developing a Profibus-DP Application ......................... 42
4.3. Description of Services Assigned to Gateway I/O................ 43
5.5. Description of the Gateway Status Word ............................. 49
6. Configuring the Gateway ................................... 51
6.1. Connecting the Gateway to the Configuration PC ............... 51
6.1.1. Pin Outs ......................................................................... 52
6.1.2. RS-232 Link Protocol..................................................... 52
6.2. Installing ABC-LUFP Config Tool......................................... 53
6.3. Connecting to / Disconnecting from the Gateway................ 54
6.4. Importing the Gateway Configuration .................................. 55
6.5. Transferring a Configuration to the Gateway ....................... 56
6.6. Monitoring the Content of the Gateway’s Memory............... 56
6.7. Deleting a Modbus Slave ..................................................... 59
6.8. Adding a Modbus Slave ....................................................... 60
6.9. Changing the Periodic Data Exchanged with a Modbus
Slave..................................................................................... 62
6.9.1. Replacing a Periodic Input Data Element ...................... 62
6.9.2. Replacing a Periodic Output Data Element ................... 63
6.9.3. Increasing the Amount of Periodic Input Data ............... 64
6.9.4. Increasing the Amount of Periodic Output Data ............ 69
6.10. Deleting Aperiodic Parameter Data ................................... 74
6.11. Changing a Modbus Slave Configuration .......................... 76
6.11.1. Changing the Name of a Modbus Slave ...................... 77
6.11.2. Changing the Address of a Modbus slave ................... 77
6.11.3. Changing the Name of a Modbus Command or
Transaction .................................................................... 78
6.12. Adding and Setting Up a Modbus Command..................... 79
6.12.1. With the TeSys U Motor Starters ................................. 79
6.12.2. With a Generic Modbus Slave ..................................... 82
6.12.3. Adding a Special Modbus Command .......................... 95
6.13. Configuring the General Characteristics of the Gateway. 101
6.13.1. “Fieldbus” Element..................................................... 101
6.13.2. “ABC LUFP” Element................................................. 102
6.13.3. “Sub-Network” Element ............................................. 104
6.14. Adding a Broadcaster Node............................................. 106
Appendix A: Technical Characteristics.............. 107
Appendix B: LUFP7 Gateway GSD File .............. 113
Appendix C: Default Configuration..................... 117
Appendix D: Sample Use under PL7 PRO.......... 120
Appendix E: Profibus-DP Data and Diagnostics128
Appendix F: Modbus Commands ....................... 132
Appendix G: Concept and Quantum PLC .......... 136
Index....................................................................... 137
Glossary................................................................. 138
5. Gateway Initialization and Diagnostics ............ 44
5.1. Full Management.................................................................. 44
5.1.1. Profibus-DP master command Word ............................. 45
5.1.2. Gateway Status Word .................................................... 45
5.2. Diagnostic and Control ......................................................... 45
5.2.1. Profibus-DP master command Word ............................. 45
5.2.2. Gateway Status Word .................................................... 46
5.3. Simplified Operation ............................................................. 46
5.4. Description of the Profibus-DP master command Word ...... 47
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3
Safety Information
NOTICE
PLEASE NOTE
4
Read these instructions carefully, and look at the equipment to become familiar with the
device before trying to install, operate, or maintain it. The following special messages may
appear throughout this documentation or on the equipment to warn of potential hazards or
call attention to information that clarifies or simplifies a procedure.
Electrical equipment should be installed, operated, serviced, and maintained only by
qualified personnel. No responsibility is assumed by Schneider Electric for any
consequences arising out of the use of this material.
1744087 03/2009
About the book
Validity Note
This document applies to all V2 gateways.
Functions and improvements compared to previous product version:
¾ Increased number of instances/transactions from 50 to approximately 100.
¾ Password protection for configuration upload/download in LUFP9.
¾ Sub-network Line Analyzer debugging feature.
¾ Improved response trigger behaviour.
¾ MS Windows association of configuration (*.CFG) files possible. A double-click will
automatically open the configuration file in the ABC-LUFP Config Tool.
¾ Extended display functionality in node monitor (updated column width and
hexadecimal / decimal display).
¾ Simplified usability. New and improved options menu.
The data and illustrations in this manual are not contractual. We reserve the right to modify
our products in line with our policy of continuous development. The information given in this
document may be modified without notice and must not be interpreted as binding in the part
of Schneider Electric.
_________________________________________________________________________
Related
Documents
Title of Documentation
Reference Number
AnyBus Communicator – User Manual
Safety Guidelines for the Application,
Maintenance of Solid State Control
Installation,
ABC_User_Manual.pdf
(SDN-7061-059)
and NEMA ICS 1.1
(latest edition)
Safety Standards for Construction and Guide for Selection, NEMA ICS 7.1
Installation and Operation of Adjustable-Speed Drive Systems
(latest edition)
Modbus User Guide
TSX DG MDB E
Modicon Modbus Protocol Reference Guide
PI-MBUS-300 Rev. J
You can download these technical publications and other technical information from our
website at www.schneider-electric.com.
_________________________________________________________________________
User Comments
1744087 03/2009
We welcome your comments about this document. You can reach us by e-mail at
[email protected].
5
1. Introduction
1.1. Introduction to the User’s Manual
Chapter 1
describes the gateway, the user guide that comes with it and the terms used in it.
Chapter 2
gives an introduction to the gateway and describes all the items used when setting it up, both
inside (thumb wheels) and outside (cables and connectors) the gateway.
Chapter 3
describes the six LEDs on the front of the gateway.
Chapter 4
describes the successive steps for setting the gateway up with its default configuration, with a
PLC using Profibus-DP. LUFP7 gateways are shipped pre-configured to allow you to interface a
Profibus-DP master with 8 predefined Modbus slaves (TeSys U motor starters).
Chapter 5
describes two registers in the gateway’s memory reserved for initializing and carrying out
diagnostics on the gateway. They are only exchanged between the Profibus-DP master and the
gateway.
Chapter 6
describes how to use the “ABC-LUFP Config Tool” software application, which allows you to modify or
create a new configuration for the gateway and shows the various features of this software (add or
remove a Modbus slave, add or change a Modbus command, etc.).
This chapter also shows the changes to be made to software implementation operations in SyCon
and PL7 PRO.
Appendix A describes the technical aspects of both the gateway and the Profibus-DP and Modbus RTU
networks it is interfaced with.
Appendix B details and describes the content of the GSD file shipped with the gateway. The file can be used
for the setup tools to recognize the LUFP7 gateway as a Profibus-DP subscriber with
communication features of its own.
Appendix C describes the main features of the default configuration of the LUFP7 gateway. However, it does
not go into ABC-LUFP Config Tool in detail.
Appendix D gives an advanced example using the LUFP7 gateway’s default configuration. This example
exploits the command and monitoring registers for 8 TeSys U motor starters and uses the
aperiodic read and writes services used to access the value of any motor starter parameter.
Appendix E repeats the information described in the Implementation manual of the TSX PBY 100 coupler for
Premium PLCs. It also provides the values of these data and the results of these diagnostics for
the LUFP7 gateway.
Appendix F describes the content of the Modbus command frames supported by the LUFP7 gateway.
Appendix G explains about Concept data type with a Quantum PLC.
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1744087 03/2009
1. Introduction
Quick Access to Critical Information
using…
(2) TeSys U Products
(1)
User of …
Presentation
of
Hardware
and
Connections
the predefined
(2b) configuration, the nb of
modifying …
slaves (< 8)
using…
(3)
User of …
other Products
the predefined
(2a) configuration
(with 8 slaves)
(2c) new variables
using…
via ABC-LUFP
Config Tool
(4)
Managing Loss of Communication
in case of a predefined configuration
(5) Signaling and Diagnostics
(1) Presentation of Hardware and Connections
See Chapter 2
- powering,
- mounting,
- Modbus connecting,
- Profibus connecting,
- Transmission speed and address selecting
(3) User of other Generic Modbus Products
See Chapter 6
(6.7 to 6.11, 6.11.2)
- building up your own configuration
from scratch (see ABC User Manual)
(2) User of TeSys U Products
(2a) with 8 slaves
(4) Loss of Communication
See Chapter 4
(2b) reducing the number of slaves
See Chapter 6
See Chapter 4.1.4.1
and Chapter 6.11.2.2
Using ABC-LUFP Config Tool:
- install (6.2),
- connect (6.1),
- remove slaves (6.6)
(2c) access to new variables
See Chapter 6
Select between:
- adapting the predefined configuration
provided with the gateway, if close
enough to that you wish (1 register to
read and 1 to write, 1 register address
to change), or
Using ABC-LUFP Config Tool to access
other registers than standard
704 (Command) and 455 (Status)
with the same request:
- replace a register with another (for
instance 455 with 458)
- expand the size (the number of
registers)
The variables described are:
- Reconnect time
(unit = 10ms, default value = 10s)
- Retries (default value = 3)
- Timeout time
(unit = 10ms, default value = 1s)
(5) Signaling of faults and status, Diagnostics
See Chapter 3
See Chapter 5
Signaling defaults and gateway status
by LEDs on the front
Gateway initializing mode and
description of diagnostics information
with a supplementary request:
- add-up extra commands
- other operations (6.7 to 6.11)
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7
1. Introduction
1.2. Introduction to the LUFP7 Gateway
The LUFP7 gateway allows a master located on a Profibus-DP network to enter into a dialogue with the slaves
on a Modbus RTU network. This is a generic protocol converter operating in a way which is transparent to the
user.
This gateway allows you to interface many products marketed by Schneider Electric with a Profibus-DP network.
These include TeSys U motor starters, Altivar drivers and Altistart soft start- soft stop units.
1.3. Terminology
Throughout this document, the term “user” refers to any person or persons who may need to handle or use the
gateway.
The term “RTU”, which refers to the Modbus RTU communication protocol, will be omitted most of the time. As a
result, the simple term “Modbus” will be used to refer to the Modbus RTU communication protocol.
As it is still the case with all communication systems, the terms “input” and “output” are somewhat ambiguous.
To avoid any confusion, we use a single convention throughout this document. So the notions of “input” and
“output” are always as seen from the PLC, or the Profibus-DP master.
Hence, an “output” is a command signal sent to a Modbus slave, whereas an “input” is a monitoring signal
generated by this same Modbus slave.
The diagram below shows the flows of “inputs” and “outputs” exchanged between a Profibus-DP master and
Modbus RTU slaves via the LUFP7 gateway:
Profibus-DP Master
INPUTS
OUTPUTS
LUFP7
Gateway
490 NAE 911 00
Altistart 48
Modbus RTU Slaves
NOTE: For more explanation about specific terms, refer to the Glossary at the end of this guide.
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1. Introduction
1.4. Introduction to the Communication “System” Architecture
Each LUFP7 Profibus-DP / Modbus RTU gateway allows one of the PLCs on the Profibus-DP network to
command, control and configure up to 8 Modbus slaves. 50 commands (Modbus requests) can be distributed
over a maximum of 8 slaves. If there are more than 8 Modbus slaves, you will need to use an appropriate
number of LUFP7 gateways.
Profibus-DP
Master
Total of 16
motor starters
(TeSys U model)
Upstream network (Profibus-DP)
Downstream
network no.1
(Modbus)
Downstream
network no.2
(Modbus)
ATS48
VW33-A48
ATS46
VW3-G46301
Downstream network no.3 (Modbus)
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9
1. Introduction
The LUFP7 gateway behaves both as a Profibus-DP slave on the upstream network and as a Modbus RTU
master on the downstream network.
See Appendix A: Technical Characteristics if you would like to read about the technical communication
characteristics of the LUFP7 gateway.
The gateway can carry out its data exchanges (inputs and outputs of all types) with the Modbus slaves cyclically,
aperiodically or in an event-driven way. All of these Modbus exchanges make up the gateway’s “Modbus
scanner” and we use the “ABC-LUFP Config Tool” software application to configure this scanner’s exchanges.
Every item of data exchanged in this way is made available for the Profibus-DP master, which can gain access
to it in a number of ways (cyclical, aperiodic or event-driven exchange).
The diagram on the preceding page illustrates the distribution of several slaves throughout three downstream
Modbus RTU networks, each of these networks being interfaced with the Profibus-DP master PLC using an
LUFP7 gateway.
1.5. Principle of Gateway Configuration and Operation
The gateway is part of a family of products (referred to as LUFPz) designed to meet generic needs for
connection between two networks using different communication protocols.
The software elements common to all these gateways (a configuration tool known as “ABC-LUFP Config Tool” and
the on-board Modbus software) cohabit with the specific features of the network upstream of each of them
(Profibus-DP in the case of the LUFP7 gateway) generically. This is one of the reasons why the interfacing
between the upstream network and the Modbus network is carried out entirely via the gateway’s physical memory.
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1744087 03/2009
1. Introduction
Each LUFP7 gateway is shipped pre-configured so as to make it easier to operate and the factory settings can
be used as a basis for a configuration which will best meet the user’s expectations. The typical operations
applicable to this default configuration are described in chapter 6.
The Profibus-DP network is totally separate from the Modbus network. The frames on a network are not directly
“translated” by the gateway to generate frames on the other network. Instead, the exchanges between the content
of the gateway’s memory and the Modbus slaves make up a system which is independent of the one which is
entrusted with managing the exchanges between this same memory and the Profibus-DP master. The system
guarantees the coherence of data exchanged within the shared memory.
You must check that the size of the Profibus-DP data corresponds to the size of the memory used for the
Modbus exchanges, because the gateway configures its Profibus-DP exchanges on the basis of the memory
used by the Modbus frames. If the sizes do not match, the fieldbus Diag LED n°4 blinks at 1 Hertz frequency,
cyclic Modbus exchanges are enabled and write-access Modbus registers are set to 0.
The example which follows illustrates the independent management of each of the two networks:
— Managing Gateway ↔ Modbus slaves exchanges —
(1)
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The sum of Input Data and Output Data is limited to 416 bytes max.
11
2. Hardware Implementation of the LUFP7 Gateway
2.1. On Receipt
After opening the packaging, check that you have an LUFP7 Profibus-DP / Modbus RTU gateway equipped with
a detachable power connector.
2.2. Introduction to the LUFP7 Gateway
The cables and other accessories for connecting to Profibus-DP and Modbus networks need to be ordered
separately.
Legend:
12
c
Detachable power connector for the
24V ±10%).
gateway (
d
Female RJ45 connector to a PC
running ABC-LUFP Config Tool
configuration software.
e
Female RJ45 connector for the
downstream Modbus RTU network.
f
Six diagnostic LEDs.
g
Removable cover for the coding
wheels used to configure the gateway,
shown and described in chapter 2.7.
The label describing the LEDs is stuck
onto this cover.
h
Female Profibus-DP connector.
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2. Hardware Implementation of the LUFP7 Gateway
The LUFP7 enables communications between a Profibus network and Modbus devices for the purpose of
industrial automation and control. As with any component used in an industrial control system, the designer
must evaluate the potential hazards arising from use of the LUFP7 in the application.
WARNING
LOSS OF CONTROL
•
The designer of any control scheme must consider the potential failure modes of control paths and, for
certain critical control functions, provide a means to achieve a safe state during and after a path failure.
Examples of critical control functions are emergency stop and overtravel stop.
•
Separate or redundant control paths must be provided for critical control functions.
•
System control paths may include communication links. Consideration must be given to the implications of
unanticipated transmission delays or failures of the link. a
•
Each implementation of an LUFP• Gateway must be individually and thoroughly tested for proper
operation before being placed into service.
Failure to follow this instruction can result in death, serious injury, or equipment damage.
a
For additional information, refer to NEMA ICS 1.1 (latest edition), “Safety Guidelines for the Application, Installation, and Maintenance of Solid
State Control” and to NEMA ICS 7.1 (latest edition), “Safety Standards for Construction and Guide for Selection, Installation and Operation of
Adjustable-Speed Drive Systems”.
2.3. Mounting the Gateway on a DIN Rail
Removing the gateway
Mounting the gateway
1
1
2
Start by fitting the rear base of the gateway to the
upper part of the rail, pushing downwards (1) to
compress the gateway’s spring. Then push the
gateway against the DIN rail (2) until the base of the
gateway box fits onto the rail.
2
Start by pushing the gateway downwards (1) to
compress the gateway’s spring. Then pull the
bottom of the gateway box forwards (2) until the box
comes away from the rail.
NOTE: The spring is also used to ground the gateway (Protective Earth).
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2. Hardware Implementation of the LUFP7 Gateway
2.4. Powering the Gateway
Profibus-DP / Modbus RTU gateway – View from underneath
–
+
Power supply
24V isolated (±10%)
95 mA max.
WARNING
RISK OF UNINTENDED EQUIPMENT OPERATION
Do not use the 24 VDC power available from the Profibus network cabling to operate the LUFP• Gateways,
as the negative terminal (⎯) of this power is not necessarily at the installation earth ground potential. Use of
an ungrounded power supply may cause the LUFP• devices to operate in an unexpected manner.
To ensure reliable operation, the LUFP• Gateways require a separate power supply where the negative
terminal (⎯) is connected to the installation earth ground.
Failure to follow this instruction can result in death, serious injury, or equipment damage.
Recommendations:
•
•
Use 60/75 or 75xC copper (CU) wire only.
The terminal tightening torque must be between 5-7 lbs-in (0.5-0.8 Nm).
2.5. Connecting the Gateway to the Modbus Network
Three typical examples of Modbus connection for the gateway and its slaves are shown below. There are many
other possible Modbus connections, but they are not covered in this document.
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2. Hardware Implementation of the LUFP7 Gateway
2.5.1. Examples of Modbus Connection
•
“Bus” topology with LU9 GC3 splitter box
The connections are shown below:
1
2
3
4
5
6
7
LUFP7 gateway
Modbus cable
Modbus splitter box LU9 GC3
Modbus cables VW3 A8 306 R●●.
Line terminators VW3 A8 306 R
Modbus T-junction boxes VW3A8306TF●● (with cable)
Modbus cable (to another splitter box) TSX CSA●00 (replaces (5))
NOTE: It is advisable to place a line terminator at each end of the bus to avoid malfunctions on the
communication bus. This means that a tee should not have a free connector. It is either connected to a slave or
to the master, or there is a line terminator.
NOTE: It is important to connect the bus to the “IN” input of the splitter box. Connection to another splitter box is
made via the “OUT” output.
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2. Hardware Implementation of the LUFP7 Gateway
• “Bus” topology with VW3 A8 306 TF3 T-junction boxes: This topology uses VW3 A8 306 TF3 T-junction
boxes to connect each of the Modbus slaves to the main section of the Modbus network. Each box should be
placed in the immediate vicinity of the Modbus slave it is associated with. The cable for the main section of the
Modbus network must have male RJ45 connectors (like the VW3 A8 306 R•• cable used with the splitter box).
The lead between the T-junction box and the slave or the Modbus gateway is an integral part of this box. The
connections are shown below:
LUFP7 Gateway
Modbus
VW3 A8 306 TF3
Line
termination
Towards 2 Modbus slaves
Towards 3 Modbus slaves
Line
termination
Towards 3 Modbus slaves
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2. Hardware Implementation of the LUFP7 Gateway
• “Bus” topology with SCA junction boxes: This topology is similar to the previous one, except that it uses
TSXSCA62 subscriber connectors and/or TSXCA50 subscriber connectors. We recommend using a
VW3 A68 306 connection cable and the TSXCSA•00 Modbus cables. Connect the RJ45 connector on the
VW3 A68 306 cable to the Modbus connector on the LUFP7 gateway.
The connections are shown below:
VW3 A68 306
TSXSCA62
Modbus
LUFP7 Gateway
TSXCSA•00
2.5.2. Pin Outs
In addition to the pin out for the connector on the gateway, the one on the VW3 A68 306 cable is also shown
below, as it is the only Modbus cable which does not exclusively use RJ45 connections.
— LUFP7 connector —
Female RJ45
Male RJ45
Male 15-point SUB-D
1
2
1
3
3
2
D(B)
4
D(B)
4
14 D(B)
D(A)
5
D(A)
5
7
0V
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———— VW3 A68 306 cable for TSXSCA62 box ————
6
6
7
7
8
0V
8
D(A)
15 0V
17
2. Hardware Implementation of the LUFP7 Gateway
2.5.3. Wiring Recommendations for the Modbus Network
• Use a shielded cable with 2 pairs of twisted conductors,
• connect the reference potentials to one another,
• maximum length of line: 1,000 meters (3280 ft)
• maximum length of drop line / tap-off: 20 meters (65.5 ft)
• do not connect more than 9 stations to a bus (slaves and one LUFP7 gateway),
WARNING
RISK OF UNINTENDED EQUIPMENT OPERATION
Do not connect more than 9 stations to the Modbus fieldbus (gateway and 8 slaves). While the gateway
may appear to operate correctly with more than 9 devices, it is likely one or more devices will only
communicate intermittently, leading to unpredictable system behavior.
Failure to follow this instruction can result in death, serious injury, or equipment damage.
• cable routing: keep the bus cable away from power cables (at least 30 cm (0.98 ft)), make crossings at right
angles if necessary, and connect the cable shielding to the earth on each unit,
• adapt the line at both ends using a line terminator (see diagram and VW3 A8 306 RC termination below).
D(B)
4
120 Ω
D(A)
5
1 nF
— Line termination recommended at both ends of the line —
— VW3 A8 306 RC line termination —
WARNING
MODBUS TERMINATION USING THE RESISTANCE-ONLY METHOD
Use only RC (Resistance-Capacitance) Modbus cable terminations with the LUFP7 Gateway. The LUFP•
gateways are designed to support client equipment that will not function correctly without using RC-type
Modbus cable termination.
Failure to follow this instruction can result in death, serious injury, or equipment damage.
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2. Hardware Implementation of the LUFP7 Gateway
To make it easier to connect the units using the topologies described in chapter 2.5.1, various accessories are
available in the Schneider Electric catalogue:
1) Hubs, junctions, and line terminations:
… LU9GC03 hub ..........................................................This passive box has 8 female RJ45 connectors. Each of
these connectors can be connected to a Modbus slave, to
(“bus” topology with LU9GC03 splitter boxes)
a Modbus master, to another Modbus hub, or to a line
termination.
… VW3 A8 306 TF3 T-junction box ..............................This passive box includes a short lead with a male RJ45
(“bus” topology with VW3 A8 306 TF3 T-junction connector allowing it to be connected directly to a Modbus
boxes)
slave, without having to use a different cable. It is fitted
with 2 female RJ45 connectors for the connection of two
Modbus cables of the VW3 A8 306 R•• type.
… 2-way TSXSCA62 subscriber connector..................This passive box has a printed circuit fitted with screw
(“bus” topology with SCA junction boxes)
terminals and allows the connection of 2 subscribers to
the bus (2 female 15 point SUB-D connectors). It includes
the line termination when the connector is located at the
end. It is fitted with 2 screw terminals for the connection of
two double twisted pair Modbus cables.
… TSXCA50 SCA junction box.....................................This passive box allows a Modbus unit to be connected to
(“bus” topology with SCA junction boxes)
a screw terminal. It includes the line termination when the
connector is located at the end. It is fitted with 2 screw
terminals for the connection of two double twisted pair
Modbus cables.
… VW3 A8 306 RC double termination ........................Each of these two red passive boxes is a male RJ45
(all topologies)
connector 3 cm (1.18 in) long containing an RC line
termination (see diagram and illustration above). Only the
abbreviation “RC” is shown on these boxes.
2) Cables:
ƒ VW3 A8 306 R•• Modbus cable................................Shielded cable with a male RJ45 connector at each end.
(“bus” topology with SCA junction boxes)
ƒ VW3 A68 306 Modbus cable....................................Shielded cable with a male RJ45 connector and a male
(“bus” topology with SCA junction boxes)
15 point SUB-D connector. It is used to connect a Modbus
subscriber (slave or master) to a TSXSCA62 or TSXCA50
box.
ƒ Shielded double twisted pair Modbus cable.............Bare cable (without connectors) used to make up the
(“bus” topology with branch boxes)
main section of the Modbus network. There are three
items available: TSXCSA100 (100 m or 328 ft),
TSXCSA200 (200 m or 656 ft), and TSXCSA500 (500 m
or 1640 ft).
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2. Hardware Implementation of the LUFP7 Gateway
2.6. Connecting the LUFP7 gateway to the Profibus-DP Network
Connect the SUB-D 9-point male plug on
the Profibus-DP connector to the
Profibus-DP plug on the LUFP7 gateway.
g
c
k
h
SUB-D
9 points
female
connector
Connections are illustrated here:
SUB-D 9-point male
490 NAD 911 04 (or 03)
Modbus
Type A
Profibus-DP cables
Ref. : TSX PB SCA100
2.6.1. Pin Outs
–—— LUFP7 plug ——–
9-point SUB-D female
1
2
D(B) 3
RTS 4
GND 5
+5V 6
7
D(A) 8
9
Grounding / Shielding
— 490 NAD 911 04/03 connector—
9-point SUB-D male
1
2
3 B-line / RxD/TxD +
4 Request To Send (1)
5 GND Network (2)
6 +5V Network (2)
7
8 A-line / RxD/TxD –
9
Shielding / Grounding
—— Type A cables ——
(TSX PB SCA100)
Incoming A cable
Outgoing A cable
(1) This signal is not mandatory and may be ignored for the LUFP7 gateway.
(2) The “GND” and “+5V” pins are meant to supply the line termination if it is present in the connector being used.
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2. Hardware Implementation of the LUFP7 Gateway
2.6.2. Wiring Recommendations for the Profibus-DP Network
• Use a shielded cable with a twisted pair of copper conductors, preferably a type A Profibus-DP cable.
• Connect the reference potentials to one another.
• You may choose the transmission rate, within limits, ranging from 9.6 kbit/s to 12 Mbit/s. The choice is made
at network startup and applies to all network subscribers.
• The maximum length of the line (segment) is inversely proportional to the transmission rate.
Transmission rate
(bit/s)
9.6 k
19.2 k
93.75 k
187.5 k
500 k
1.5 M
3.6 or 12 M
Distance/segment
(m)
1,200
1,200
1,200
1,000
400
200
100
(ft)
3,937
3,937
3,937
3,280
1,312
656
328
(m)
4,800
4,800
4,800
4,000
2,000
800
400
(ft)
15,748
15,748
15,748
13,123
6,562
2,625
1,312
With 3 repeaters
Experience shows that these lengths may be doubled using lines with a section of 0.5 mm² (20 AWG).
• Do not connect more than 32 master or slave stations per segment without a repeater, 127 maximum
(repeaters included) with the 3 repeaters; do not use more than 3 repeaters.
• Cable routing: keep the bus cable away from power cables (at least 30 cm (0.98 ft)), make crossings at right
angles if necessary and connect the cable shielding to the earth on each unit.
• The network ends on an active line termination, at each segment end (see diagram below); many suppliers
have provided their cables with switchable line terminations. The LUFP7 gateway has no internal line
termination and therefore applies a 5V voltage between pins 5 and 6 of its Profibus-DP plug in order to allow
for the use of an external line termination when the gateway is at the end of the line.
GND
D(A)
D(B)
+5V
5
3
8
6
390 Ω
220 Ω
390 Ω
Active line
termination
recommended
at both ends
NOTE: If you use a 490 NAD 911 03 connector on each of the two stations located at segment end, you
won't have to use an external line termination, since a line termination is integrated to that type of connector.
However, if you must disconnect a station to which such a connector is connected, move the connector to
another station on the same network so that the line termination continues to be supplied. If you do not wish
to make that type of arrangement, preferably use connectors featuring a switchable line termination.
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2. Hardware Implementation of the LUFP7 Gateway
To connect stations to the Profibus-DP network more easily, several accessories are offered in the Schneider
Electric catalogue:
– Single twisted pair type A Profibus-DP cable
(100 m or long): TSX PB SCA100. If you use a
different cable, please check that its electric
characteristics are as close as possible to those
of type A cables (see Appendix A: Technical
Characteristics).
490 NAD 911 04 (or 03) connector
– Line connector: 490 NAD 911 04. The SUD-D
9-point male plug on that connector should not
be connected to a station located at the
segment end, as the connector has no line
termination. This passive box contains a printed
circuit fitted with one or two terminal boxes with
screws for connecting one incoming ProfibusDP cable and one outgoing Profibus-DP cable.
– End of line connector: 490 NAD 911 03. The
SUB-D 9-point male plug on that connector
must be imperatively connected to a station
located at segment end, since the connector
has a line termination. This passive box
contains a printed circuit fitted with one terminal
box with screws for connecting one incoming
Profibus-DP cable.
B A B A
Red
Green
e
c
d
Legend:
c Incoming A cable.
d Outgoing A cable (absent in the case of the
490 NAD 911 03 connector).
e Cable collar; the cable sheath must be uninsulated,
at the most, in the middle of the collar.
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2. Hardware Implementation of the LUFP7 Gateway
2.7. Configuring the Profibus-DP Communication Features
This configuration must be carried out when the gateway is turned off.
CAUTION
OPENING LUFP• COVER WITH POWER ON
The power supply of the gateway must be turned off before opening the cover. Once the cover has been
removed, make sure you touch neither the electrical circuits nor the electronic components, as this may
damage the device.
Failure to follow this instruction can result in injury or equipment damage.
This task is limited to configuring the gateway's Profibus address, as the communication speed on the Profibus
network (9.6 kbits/s to 12 Mbits/s) is automatically detected by the gateway.
The two coding wheels used for configuring the gateway’s address are hidden behind the gateway cover g (see
illustration in chapter 2.2). To remove this cover, insert the end of a small flat screwdriver between the top of the
hood and the gateway box and pull it out.
2.7.1. Encoding the Gateway Address
The LUFP7 gateway is identified on the Profibus-DP bus by its address, ranging from 1 to 99.
Units
Tens
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The gateway's Profibus-DP address depends on the position of the two
coding wheels represented on the left, in their factory-setting positions
(default address = 2).
This address is the sum of the decimal values given by the angular
positions of the bottom coding wheel (tens) and the top coding wheel
(units).
23
2. Hardware Implementation of the LUFP7 Gateway
Any change to the gateway's address shall be taken into account only once it is powered on again.
Examples:
Address = 19
Units
Tens
Address = 73
Units
Tens
2.7.2. No Internal Line Termination
The LUFP7 gateway has no active line termination. You must use a Profibus-DP connector with such a
termination if you place the gateway at one of the ends of a bus segment.
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3. Signaling
The gateway’s 6 LEDs and the descriptive label on the removable cover which hides its two coding wheels
(gateway address) allow you to diagnose the status of the gateway:
d
c
LUFP7
e
h
g
DEL
n
p
r
ONLINE
LED Æ Gateway state
Off: Profibus-DP bus:
Gateway off-line
Green: Profibus-DP bus:
Gateway on-line
(exchanges are possible)
NOT
USED
Off: —
MODBUS
Off: No power
Flashing (green): No
Modbus communications
Green: Modbus
communications OK
Red:
- Loss of communication with
at least one Modbus slave
(2)
- Exception code coming from
a command or a transaction
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n o
p q
r s
f
LED
1 ONLINE
2 OFFLINE
3 NOT USED
4 FIELDBUS DIAG
5 MODBUS
6 GATEWAY
LED Æ Gateway state
Off: Profibus-DP bus: gateway on-line
o
OFFLINE
q
FIELDBUS
DIAG
s
GATEWAY
Red: Profibus-DP bus: Gateway off-line
(exchanges are impossible)
Off: Gateway initialization achieved
Flashing red (1 or 2 Hz): Gateway
configuration error. (1)
Flashing red (4 Hz): Error when resetting the
gateway on Profibus-DP. (1)
Off: No power
Flashing (red/green): Configuration absent / not valid
Use ABC-LUFP Config Tool to load a valid
configuration
Green: Gateway currently being initialized
and configured
Flashing (green): Gateway is in running
order: Configuration OK
25
3. Signaling
(1)
Specific errors indicated by the LED q FIELDBUS DIAG
• Flashing red LED (1 Hz): input and/or output data length is invalid.
Check the overall length of the gateway data, under ABC-LUFP Config Tool (“Monitor” option from the
“Sub-Network” menu), then adjust exchanges with the gateway accordingly, using the Profibus-DP network
configuration software (e.g.: SyCon).
• Flashing red LED (2 Hz): User parameter data length and/or content is invalid.
• Flashing red LED (4 Hz): Error when resetting the ASIC in charge of Profibus-DP communications.
(2) The LED r MODBUS becomes red when one or more Modbus slaves fail to respond to the gateway in the
expected fashion. This can be caused by:
ƒ Loss of communications (e.g. a broken or disconnected cable)
ƒ Writing incorrect values to the outputs corresponding to the two aperiodic read/write services
(see chapter 4.3).
NOTE: When LED r MODBUS is flashing red due to a simple loss of communications, the LED will revert to a
green state when communications are restored. When LED (5) is flashing red due to the use of incorrect values
with the aperiodic read/write services, then the only way to clear the error is to reuse these aperiodic services
with correct values.
NOTE: If the LED s GATEWAY is flashing following a sequence beginning with one or more red flashes, we
advise that you note down the order of this sequence and give this information to the Schneider Electric support
service. In some cases, power the gateway off then back on again to solve the problem.
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4. Software Implementation of the Gateway
4.1. Introduction
This chapter gives an introduction to a quick implementation of the LUFP7 gateway, using its default
configuration. All LUFP7 gateways ship pre-configured.
NOTE: The configuration has been defined for 8 motor starters. If you use less than 8, refer to chapter 6.
This pre-configuration means that the user does not have to configure the LUFP7 gateway using ABC-LUFP
Config Tool. This configuration is described in order to allow the gateway to be used with a configuration tool for
Profibus-DP master PLCs. As an example this implementation will use Sycon (version ≥ V2.5.0.0), the multinetwork configuration software marketed by Hilscher (Réf.: TLX L FBC 10 M), PL7 PRO (version ≥ V3.0) and a
Schneider Electric PLC from the Premium range (e.g. TSX 57353 v5.1) to which the appropriate Profibus-DP
communication board shall be added (TSX PBY 100 coupler).
4.1.1. System Architecture
The default configuration for an LUFP7 gateway allows it to control, monitor and configure 8 TeSys U motor
starters:
Profibus-DP
master PLC
TSX 57353 v5.1
+ TSX PBY 100
Configuration
PC
(PL7 PRO
+ SyCon)
Profibus-DP
(upstream network)
490 NAE 911 00
Modbus
addresses
c
d
LUFP7
gateway
e
f
g
h
Total of 8
motor starters
(TeSys U model)
i
j
Modbus (downstream network)
Line
termination
Connection
boxes
Please see chapter 2, for the hardware implementation of the default configuration.
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4. Software Implementation of the Gateway
4.1.2. Configuring the Motor Starters
Each motor starter should be configured as follows:
Protocol:
Modbus address
Bitrate
Data bits
Modbus RTU slave
1 to 8
19,200 bits/s
8
Start bits
Parity
Parity bit
Stop bits
1
None
0
1
When using a TeSys U motor starter with a Modbus communication module (LULC03● module), the
configuration parameters for the RS485 connection are automatically detected, only the Modbus address of the
motor starter needs to be configured.
4.1.3. Modbus Cycle Time
The LUFP7 gateway’s default configuration sets a cycle time of 300 ms on Modbus commands for each of the
8 TeSys U motor starters.
4.1.4. Managing Degraded Modes With the Gateway Default Configuration
The default management for degraded modes is described below. Please see chapter 6.12.2.1, if you would like
to change the way that degraded modes are managed within the gateway.
4.1.4.1. Description of the Gateway Degraded Mode Options
Offline options for fieldbus
This option affects the data sent to a Modbus slave if there is no communication coming from the Profibus
master.
It is defined at the Query level of each command or transaction sent to the different slaves.
This option can take 3 values:
Clear:
All data sent to the concerned Modbus slave is set to 0.
Freeze:
All data sent retains its current value.
No scanning: The query is no more transmitted.
With the gateway's default configuration:
"Clear" option is selected for periodic exchanges
"No scanning" is selected for aperiodic exchanges
Which means that Command and Status registers of the TeSys U continue to be refreshed:
but output memory associated (Tesys U command registers) is forced to 0,
and input memory (Tesys U status registers) works normally,
Aperiodic Modbus exchanges are stopped.
Timeout time
This option defines the time the gateway will wait for a response before it either retries to send the same request,
or it disconnects the slave and declares it missing.
It is defined at the Query level of each command or transaction sent to the different slaves.
With the gateway’s default configuration, this time is equal to 300 ms.
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4. Software Implementation of the Gateway
Retries
This option determines the number of re-transmissions carried out by the gateway if there is no response from
the slave.
It is defined at the Query level of each command or transaction sent to the different slaves.
With the gateway’s default configuration, this option is set to 3.
Reconnect time
This option defines the amount of time the gateway will wait before it tries to communicate again with a Modbus
slave that was previously declared as missing.
It is defined at the Query level of each command or transaction sent to the different slaves.
With the gateway’s default configuration, this time is equal to 10 sec.
! WARNING
RISK OF UNINTENDED EQUIPMENT OPERATION
During the reconnect time, you cannot control a slave (read/write) via the bus. Depending on the slave
characteristics and the watchdog configuration, the slave can keep the same status or take a fallback position.
To avoid an unintended equipment operation, you must know the possible status of a slave and adapt the timeout
and reconnect time values according to the request sending rate.
Failure to follow this instruction can result in death, serious injury, or equipment damage.
Offline options for sub-network
This option affects the data sent to the Profibus master if there is no response coming from a slave.
It is defined at the Response level of each command or transaction sent from the different slaves.
This option can take 2 values:
Clear:
All data sent to the Profibus master is set to 0.
Freeze:
All data sent to the Profibus master retains its current value.
With the gateway’s default configuration, "Clear" option is selected and Tesys U status registers and aperiodic
input data are forced to 0.
4.1.4.2. Degraded Mode Description
This description takes into account the following elements:
The PLC processor
The Profibus master
The LUFP7 gateway
The Tesys U starters-controllers.
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4. Software Implementation of the Gateway
PLC processor stopped or on failure
PLC processor response
Outputs:
Software error: outputs reset to default state or hold their present state depending on
configuration.
Hardware error: (EEPROM or hardware failure), output state will be undetermined.
Inputs:
PLC stops responding to inputs in any error state.
Profibus master response
Depending on master configuration:
the master stops to communicate with the LUFP7 gateway,
or forces Profibus outputs to 0, and refresh inputs,
or holds Profibus outputs in their last position, and refreshes inputs.
LUFP7 gateway response
If the master forces Profibus outputs to 0, and refreshes the inputs:
periodic: Modbus exchanges continue to run with outputs set to 0,
input memory continues to be refreshed,
aperiodic: Modbus exchanges are stopped.
If the master holds Profibus outputs, and refreshes the inputs:
periodic: Modbus exchanges continue to run, with output memory associated hold in their last
position, input memory continues to be refreshed,
aperiodic: Modbus exchanges are stopped.
Tesys U response
If the master forces the outputs to 0:
periodic Modbus exchanges continue to run,
Command registers are set to 0 and motors are stopped,
Status register are transmitted to the gateway,
aperiodic Modbus exchanges are stopped.
If the master holds Profibus output words, and refreshes the inputs words:
Periodic: Modbus exchanges continues to run,
Command registers hold their last values and motors stays in the same state,
Status register data is transmitted to the gateway,
Aperiodic: Modbus exchanges are stopped.
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4. Software Implementation of the Gateway
Profibus master stopped or on failure
PLC processor response
The PLC processor provides some error and/or diagnostic objects to the application in case of
Profibus master stop or failure (input/output not valid).
Refer to the PLC user manual to have their description.
This information must be managed in the PLC application.
Profibus master response
If the Profibus master is stopped (command coming from the application):
the master stops to communicate with the LUFP7 gateway.
If the Profibus master is on failure,
the master stops to communicate with the processor and the LUFP7 gateway.
LUFP7 gateway response
With the gateway default configuration (Offline option for fieldbus):
periodic: Modbus exchanges continue to run,
with the output memory associated forced to 0,
input memory continues to be refreshed,
aperiodic: Modbus exchanges are stopped.
Tesys U response
Periodic: Modbus exchanges continue to run:
Command registers are set to 0 and motors are stopped,
Status register data is transmitted to the gateway,
Aperiodic: Modbus exchanges are stopped.
LUFP7 gateways disconnected on Profibus side
PLC processor response
The PLC processor provides some error and diagnostic objects coming from the Profibus master in
case of slave disconnection from the application:
Refer to the PLC user manual to have their description.
This information must be managed in the PLC application.
Profibus master response
The Profibus master provides the processor with some error and diagnostic objects in case of Profibus
slave disconnection.
LUFP7 gateway response
With the gateway default configuration (Offline option for fieldbus):
periodic: Modbus exchanges continue to run,
with output memory associated forced to 0,
input memory continues to be refreshed,
aperiodic: Modbus exchanges are stopped.
Tesys U response
periodic: Modbus exchanges continue to run:
Command registers are set to 0 and motors are stopped,
Status register data is transmitted to the gateway,
aperiodic: Modbus exchanges are stopped.
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4. Software Implementation of the Gateway
LUFP7 gateways failure
PLC processor response
The PLC processor provides some error and diagnostic objects coming from the Profibus master in
case of slave failure to the application.
Refer to the PLC user manual to have their description.
This information must be managed in the PLC application
Profibus master response
The Profibus master provides the processor with some error and diagnostic objects in case of Profibus
slave failure.
LUFP7 gateway response
In case of a failure, the gateway stops to communicate with the Profibus master and the Modbus
slaves.
Tesys U response
Depending on the Tesys U configuration:
If the starters-controllers do not receive any requests, they will:
stop the motor,
keep the same state,
or run the motor.
Refer to the Tesys U user manuals to adjust these fallback positions.
LUFP7 gateways disconnected on Modbus side or Tesys U failure
PLC processor response
The processor gives access to the gateway status word coming from the Profibus master input table
and to the gateway command word coming from the output table.
These 2 words must be managed in the PLC application in order to detect if a Modbus slave is
missing.
Profibus master response
The Profibus master must be configured to access the gateway status and command words in order to
provide Modbus diagnostic information.
LUFP7 gateway response
With the gateway’s default configuration: Timeout time = 300 ms, Retries = 3,
Reconnect time = 10 sec, and Offline option for sub-network = Clear.
After sending a request to a slave, if there is no response after 300 ms, the gateway will send it again
three times before giving the information about the slave missing in the gateway status word.
Data sent to the Profibus master (Read requests) is set to 0.
The gateway will try to reconnect the slave missing with the same sequence every 10 seconds.
Tesys U response
If the LUFP7 gateway is disconnected on Modbus side:
The starters-controllers do not receive any requests, depending on their configuration, they will:
stop the motor,
keep the same state,
or run the motor.
Refer to the Tesys U user manuals to adjust the fallback position.
In case of a Tesys U failure:
No response is sent to the gateway, the motor state will be undetermined. This case must be
managed in the PLC application.
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4. Software Implementation of the Gateway
4.2. Gateway Configuration under PL7 PRO and SyCon
The Profibus-DP master must be configured so that it has access to all of the data described in Appendix C: Default
Configuration, Input and Output data Memory.
The following chapters describe the steps in PL7 PRO (version ≥ V3.0) and SyCon (version ≥ V2.5.0.0) which you will
need to go through so that the gateway is correctly recognised by the Profibus-DP master PLC.
NOTE: The Profibus-DP network which is described in the following chapters only includes one master
(TSX 57353 v5.1 + TSX PBY 100) and one slave (LUFP7 gateway). So you will need to adapt the addressing of
the inputs and outputs shown below (%IW and %QW) according to any other slaves on the Profibus-DP network
which you need to configure.
4.2.1. Setting Up the Hardware Configuration under PL7 PRO
Under PL7 PRO, create a new application or open an application for which you want to add a Profibus-DP
network.
Edit the hardware configuration of this application, add a PBY 100 board and then edit its configuration by
double-clicking on its location in the rack.
Click on the “hilscher” button (enclosed in a red box above) to start the SyCon configuration tool.
NOTE: This button is not displayed if you have not installed SyCon on your PC.
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4. Software Implementation of the Gateway
4.2.2. Creating a Profibus-DP Network under SyCon
Select the “New” option from the “File” menu to create a new
configuration, then select the “Profibus” network”.
This option creates an empty network segment in the SyCon main
window.
In this guide, we shall immediately save this configuration and name
it “LUFP7 - Tutorial Example.pb”.
4.2.3. Selecting and Adding the Profibus-DP Master Station
Select the “Master…” option from
the “Insert” menu (or click on the
button). Move the mouse
pointer (which now looks like a
)
to the position where you want to
add the Profibus-DP master, and
left-click.
Select the “TSX PBY 100” master,
then click “Add >>”. If required, edit
its address and name.
Once back to the SyCon main window, the selected master appears in the selected insertion position:
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4. Software Implementation of the Gateway
Double-click on the line that corresponds to the
Profibus-DP master to open the “Master
Configuration” window.
In the “DP Support” frame, verify that the "Auto
addressing" box has been checked.
Lastly, select the Profibus-DP master and run the “Bus
Parameter…” option from the “Settings” menu to configure the
Profibus-DP network baud rate.
NOTE: The “Optimize” option must remain equal to
“standard”, except in case of knowledgeable users who
want to edit critical Profibus DP network settings
(accessible via the “Edit…” button).
4.2.4. Setting up the Gateway Description Files
The GSD file that describes the gateway must be located on the PC hard drive so that SyCon can access it any
time. Preferably place the file inside the directory that contains all the GSD files used by SyCon. The description
and content of that GSD file are both in Appendix B: LUFP7 Gateway GSD File.
This file (Tele071F.gsd) is available on the http:///www.schneider-electric.com website via LUFP7_V2_GSD_files
folder.
Î To import file Tele071F.gsd under SyCon, run the “Copy GSD” option from the “File” menu and select the
GSD file mentioned above from the CD. If the command completes successfully, the following message is
displayed: “The import of the GSD file was successful.”
Then, install the symbols representing the gateway under SyCon. The corresponding DIB files are:
“LUFP7_S.DIB”, “LUFP7_R.DIB”, and “LUFP7_D.DIB”.
Î Copy these files into “C:\Program Files\Hilscher\SyCon\Fieldbus\PROFIBUS\BMP”, if this is the
path where you have installed SyCon on your PC. All these operations should be conducted using Windows
Explorer, for example, as SyCon cannot proceed to their installation.
The symbols that represent each of these three files are given below:
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4. Software Implementation of the Gateway
4.2.5. Selecting and Adding the Gateway to the Profibus-DP Network
Run the “Slave…” option from the “Insert” menu (or click on the
looks like a
button). Move the mouse pointer (which now
) to the position where you want to add the LUFP7 gateway, then left-click.
In the window that appears,
select the “LUFP7” slave, then
click the “Add >>” button. If
need be, edit its address and
name.
Gateway
address
configuration is detailed in
chapter 2.7.1.
Once back to the SyCon main window, the selected slave appears in the selected insertion position:
4.2.6. Editing and Configuring the Gateway
Double-click on the line that corresponds to the LUFP7 gateway. The "Slave Configuration" window appears.
Conduct the following operations:
• In the list of available modules, select the module called “IN/OUT: 32 Byte (16 word)”. Click the “Append
Module” button to add it to the list of modules configured for the gateway. This module occupies one “Slot” and
consists of a 16-word I/O module (both in IW and OW). It is intended to allow the exchange of the various data
presented in Appendix C: Input and Output Data Memory Area paragraphs.
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4. Software Implementation of the Gateway
• In the “Assigned master” frame, check that the Profibus-DP master previously configured is selected. If not,
select it.
NOTE: Only the "Assigned master" can control the DP slave to which it has been allocated during the
configuration phase. Other DPM1 masters can only read its I/O values.
• In the "General" frame, verify that the two boxes "Activate device in actual configuration" and "Enable
watchdog control" are both checked. If not, check both.
• Validate the operations conducted by clicking on “OK”.
The left-hand
portion of this area
specifies the
gateway's
maximum capacity,
and the right-hand
portion lists the
currently
configured
"Modules".
NOTE: Do not use the “Symbolic Names” option to name the I/O exchanged with the gateway. This operation is
useless because the symbols you shall define under SyCon would not be exported and retrieved under
PL7 PRO.
NOTE: If the "Length of input data" or the "Length of output data" configured for the gateway (under SyCon)
differs from the total size of the gateway input memory area or the total size of the gateway output memory area
(under ABC-LUFP Config Tool), the gateway shall refuse going on line (LED n off and LED o red) and the
configuration error shall be indicated (LED q flashing red, at 1 Hz). Please see chapter 3.
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4. Software Implementation of the Gateway
4.2.7. Saving and Exporting the Profibus-DP Network Configuration
Save the configuration by giving it a name (“Save” or “Save As…” option from the “File” menu). The configuration
of the Profibus-DP network is then saved in a “.pb” file.
In order to export this configuration for PL7 PRO, follow these steps:
• Select the line that corresponds to the Profibus-DP master (TSX PBY 100).
• Run the “Export ► ASCII” option from the “File” menu. The newly-created file bears the “.cnf” extension.
NOTE: the filename must include a name limited to 8 characters and a 3 character extension (here, “cnf”).
• Once these operations are completed, quit SyCon.
4.2.8. Importing the Configuration of the Profibus-DP Network under PL7 PRO
Under PL7 PRO (see chapter 4.2.1), click on the “Load CNF” button. Using the options in the window that
appears, select the “cnf” file that was saved beforehand (see previous chapter).
Once this import is completed, the full path to this file appears on the right of the "Load CNF" button and the
"PROFIBUS-DP slave configuration" frame displays the two configured stations, i.e. “TSX PBY 100”, at the
address 1, and “LUFP7”, at the address 2.
In the case of the LUFP7 gateway, the default values allocated to the configuration options of the "General
PROFIBUS-DP configuration" frame can be kept (see table below). Edit them accordingly if you configure other
slaves on the same Profibus-DP network.
Optional
Task
Default value
Possible values
MAST
MAST or FAST
Used to select the type of system task that will steer the Profibus-DP network.
Outputs
Reset
Hold or Reset
Determines whether the %QW outputs meant for the Profibus-DP slaves are held or reset to zero when the
associated task (see above) is stopped, as this stop does not cause the TSX PBY 100 board to stop.
IW/QW number
128 words
32, 64, 128 or 242 words
Determines the number of words used for the input of the TSX PBY 100 board, as well as for its outputs.
The "Total" frame indicates the total number of inputs and outputs, all slaves included. The value allocated to
the “IW/QW number” option should be greater than, or equal to, the greatest of these two numbers.
The LUFP7 gateway only requires 16 words (whether for inputs or for outputs). Therefore, we could use a size
of 32 words. However, it is preferable to keep the default value, should other slaves be configured.
Diagnostic length
32 bytes
6 to 244 bytes
Determines the maximum length of a diagnostic on the Profibus-DP network.
NOTE: This length should be sufficient to host the longest diagnostic for all the slaves on the network. If the
length is insufficient, the slaves concerned shall not be active on the bus because their diagnostic shall be
invalid. The "diagnostic length" is equal to 6 bytes in the case of the LUFP7 gateway.
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4.2.9. Configuring the Gateway I/O under PL7 PRO
Using the information located in the selected “.cnf” file, PL7 PRO establishes a direct relation between the data
for each Profibus-DP slave and its equivalent I/O.
To view the LUFP7 gateway I/O, click on the line of the address 2 station in the "PROFIBUS-DP slave
configuration" frame.
If you use the vertical sliders in the "PROFIBUS-DP slave data" frame, you can see that the gateway's 16 input
words have been allocated to inputs %IW4.0 to %IW4.0.15 and that its 16 outputs words have been allocated to
outputs %QW4.0 to %QW4.0.15.
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4. Software Implementation of the Gateway
The correspondence between the content of the gateway's input memory (see Appendix C: Input Data Memory
paragraph) and the PLC inputs “%IW4.0” to “%IW4.0.15” is given in the following table:
Service
PLC input
Managing the downstream Modbus network
%IW4.0.00
%IW4.0.10
%IW4.0.20
%IW4.0.30
%IW4.0.40
%IW4.0.50
%IW4.0.60
%IW4.0.70
%IW4.0.80
%IW4.0.90
%IW4.0.10
%IW4.0.11
%IW4.0.12
%IW4.0.13
%IW4.0.14
Periodic communications
—
Monitoring of
TeSys U motor starters
Aperiodic communications
Reading the value of a motor starter
parameter (RESPONSE)
Aperiodic communications
Writing the value of a motor starter
parameter (RESPONSE)
Aperiodic communications
(“Trigger bytes” for the responses)
%IW4.0.15
Description
Bit 15....................Bit 8 Bit 7......................Bit 0
Gateway status word
Value of the motor starter c status register
Value of the motor starter d status register
Value of the motor starter e status register
Value of the motor starter f status register
Value of the motor starter g status register
Value of the motor starter h status register
Value of the motor starter i status register
Value of the motor starter j status register
Free memory location
Slave no. (0x01-0x08)
Function No. (0x03)
Bytes read (0x02)
Value of the parameter read (0xxxxx)
Slave No. (0x01-0x08)
Function No. (0x06)
Address of the parameter written (0xxxxx)
Value of the parameter written (0xxxxx)
Read parameter
Write parameter
response counter
response counter
The correspondence between the content of the gateway output storage (see Appendix C: Output Data Memory
paragraph) and the outputs of the “%QW4.0” to “%QW4.0.15” automatic controls is as follows:
Service
PLC output
Managing the downstream Modbus network
%QW4.0.00
%QW4.0.10
%QW4.0.20
%QW4.0.30
%QW4.0.40
%QW4.0.50
%QW4.0.60
%QW4.0.70
%QW4.0.80
%QW4.0.90
%QW4.0.10
%QW4.0.11
Periodic communications
—
Controlling
TeSys U motor starters
Aperiodic communications
Reading the value of a
motor starter parameter (QUERY)
Aperiodic communications
—
Writing the value of a
motor starter parameter (QUERY)
Aperiodic communications
(“Trigger bytes” for the queries)
40
%QW4.0.12
%QW4.0.13
%QW4.0.14
%QW4.0.15
Description
Bit 15....................Bit 8 Bit 7......................Bit 0
Profibus-DP master command word
Value of the motor starter c command register
Value of the motor starter d command register
Value of the motor starter e command register
Value of the motor starter f command register
Value of the motor starter g command register
Value of the motor starter h command register
Value of the motor starter i command register
Value of the motor starter j command register
Slave No. (0x01-0x08)
Function No. (0x03)
Address of the parameter to be read (0xxxxx)
Number of parameters to be read (0x0001)
Slave number
Function number
(0x01-0x08)
(0x06)
Address of the parameter to be written (0xxxxx)
Value of the parameter to be written (0xxxxx)
Read parameter
Write parameter
query counter
query counter
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4. Software Implementation of the Gateway
4.2.10. Validating and Saving the Configuration of the TSX PBY 100 Coupler
Î
Validate the various operations conducted under PL7 PRO using the
Î
Close the configuration window of the TSX PBY 100 coupler.
Î
In the PLC's hardware configuration window, click on the
Î
Save the PL7 PRO application by giving it a name.
button.
button again.
4.2.11. Allocating Symbols to the Gateway Inputs and Outputs
Allocating symbols to the gateway I/O is possible under PL7 PRO through the “Variables” – “I/O” menu. Once
these symbols are defined, they are used in the configuration window of the TSX PBY 100 coupler previously
described.
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4. Software Implementation of the Gateway
4.2.12. Using and Monitoring the TSX PBY 100 Coupler Configuration
After validating all the changes previously made, you may check the configuration of the TSX PBY 100 coupler,
the Profibus-DP network, and the LUFP7 gateway by downloading the PL7 PRO application to the PLC and
conducting a monitoring operation using the TSX PBY 100 coupler debug screen.
Î Transfer the application from the PC to the PLC by running the “Transfer program…” option from the “PLC”
menu (or click on the
button) and selecting “PC -> PLC”.
Î Switch from the OFFLINE to the ONLINE mode by running the “Connect” option from the “PLC” menu (or
click on the
button).
Î Initialize and start the PLC application using the “Init…” and “Run…” options from the “PLC” menu.
Î Open the “Hardware configuration”
and
the TSX PBY 100
board
configuration. Then, switch from
“Configuration” to “Debug” and select
the line that corresponds to the
LUFP7 gateway.
The content of the "PROFIBUS-DP
diagnostic data” frame enables you
to view the gateway's Profibus-DP
diagnostics, while the “PROFIBUSDP slave data” frame enables you
to view and change the values of
the gateway I/O. An example is
given on the right.
4.2.13. Developing a Profibus-DP Application
The Profibus-DP master PLC taken as an example is a TSX 57353 v5.1, marketed by Schneider Electric. A
sample PLC application, developed under PL7 PRO, is presented in Appendix D: Sample Use under PL7 PRO.
This example uses the PLC, the gateway and the 8 TeSys U motor starters shown in the Software
Implementation of the Gateway.
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4. Software Implementation of the Gateway
4.3. Description of Services Assigned to Gateway I/O
Managing the downstream Modbus network: Refer to chapter 5.2for a detailed description of that service,
and to Appendix C: LUFP7 Gateway Initialization and Diagnostics paragraph, for an advanced sample use. In
the case of the gateway’s default configuration, under ABC-LUFP Config Tool, the “Control/Status Byte” field of
the “ABC-LUFP” element is equal to “Enabled but no startup lock.”
Periodic communications (inputs): The value of each of the 8 words for this service corresponds to the value of
the status register of a TeSys U motor starter (register located at address 455).
Periodic communications (outputs): The value of each of the 8 words for this service corresponds to the value
to be sent to the command register of a TeSys U motor starter (register located at address 704).
Refer to Appendix D:, Controlling and Supervising the 8 TeSys U Motor Starters, for a sample use of these
"periodic communications" services.
Aperiodic communications: Refer to Appendix D:, Reading and Writing Any TeSys U Motor Starter Parameter
paragraph, for a simple example of these "aperiodic communications".
These aperiodic communications services offer functions similar to those of “parameter area PKW” which can be
found on certain Schneider Electric products, such as some ATV drives.
• Sample reading of a motor starter parameter:
Reading of the 1st fault register (address = 452 = 0x01C4) on TeSys U motor starter no. 5.
The initial values of %QW4.0.15 and %IW4.0.15 are equal to 0x0613.
The result of the reading is 0x0002 (magnetic fault).
Output
%QW4.0.90
%QW4.0.10
%QW4.0.11
%QW4.0.15
Value
0x0503
0x01C4
0x0001
0x0713
Meaning (MSB + LSB)
Slave no. + Function no.
Parameter address
Number of parameters
“Trigger byte” for the query (PF)
Input
%IW4.0.90
%IW4.0.10
%IW4.0.11
%IW4.0.15
Value
0x0005
0x0302
0x0002
0x0713
Meaning (MSB + LSB)
(not used) + Slave no.
Slave no. + Number of bytes
Value read
“Trigger byte” for the response (PF)
• Sample writing of a motor starter parameter:
Writing of the 2nd command register (address = 705 = 0x02C1) on TeSys U motor starter no. 7 at the value
0x0006 (clear statistics + reset thermal memory).
The initial values of %QW4.0.15 and %IW4.0.15 are equal to 0x0713.
The result of the writing is a command echo, that is to say that the values of the “address parameter” and
“value to be written” fields are identical in both the query and the response.
Output
%QW4.0.12
%QW4.0.13
%QW4.0.14
%QW4.0.15
Value
0x0706
0x02C1
0x0006
0x0714
Meaning (MSB + LSB)
Slave no. + Function no.
Parameter address
Value to be written
“Trigger byte” for the query (PF)
Input
%IW4.0.12
%IW4.0.13
%IW4.0.14
%IW4.0.15
Value
0x0706
0x02C1
0x0006
0x0714
Meaning (MSB + LSB)
Slave no. + Function no.
Parameter address
Written value
“Trigger byte” for the response (PF)
There is no error check performed on data transmitted using the aperiodic services described above. Incorrect
values written to the outputs that correspond to the aperiodic communication services will lead to the
transmission of an incoherent Modbus frame. This incoherent Modbus frame may return an error, or lead to
unexpected behavior of the slave devices.
WARNING
RISK OF UNINTENDED EQUIPMENT OPERATION
The user must perform error checking and appropriate error handling for values written to the outputs
corresponding to the aperiodic communications services. Incorrect values sent to the aperiodic services
outputs can lead to unexpected system behavior.
Failure to follow this instruction can result in death, serious injury, or equipment damage.
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5. Gateway Initialization and Diagnostics
The chapter describes the principle used to initialize and carry out diagnostics on the gateway using each of the
three options offered by the gateway. These options can be configured via ABC-LUFP Config Tool, by changing
the assignment of the “Control/Status Byte” field for the “ABC-LUFP” element (see chapter 6.13.2). These
options are:
Meaning:
“Control/Status Byte” field:
Enabled ............................................................. Full Management
Enabled but no startup lock ............................. Diagnostic and Control
Disabled............................................................. Simplified Operation
The option chosen in the default configuration is “Enabled but no startup lock.”
Full Management
Management in the PLC application of :
Æ Start-up of Modbus cyclic exchanges
Æ Modbus slave(s) activation / deactivation
Diagnostic and Control
Æ Modbus network diagnostic.
Management in the PLC application of :
Æ Modbus slave(s) activation / deactivation
Simplified Operation
Æ Modbus network diagnostic.
Æ Automatic start-up of Modbus cyclic exchanges
Æ No Modbus slave(s) activation / deactivation
Æ No Modbus network diagnostic
5.1. Full Management
The Profibus master manages the start-up of Modbus cyclic exchanges, the Modbus slaves activation / deactivation,
and Modbus network diagnostic by means of 2 words:
ƒ
A Profibus-DP command Word
which is transmitted by the PLC application,
and is associated to addresses 0x0200 and 0x0201 of the gateway output memory
ƒ
A Gateway Status Word
which is transmitted by the gateway
and is associated to addresses 0x0000 and 0x0001 of the gateway input memory
The Gateway Status Word is not refreshed cyclically. The updating of this word is based on a toggle-bit
system which must be managed in the PLC application:
Diagnostic is refreshed by the gateway using toggle bit B15
New command from the Profibus master is sent using toggle bit B14
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5. Gateway Initialization and Diagnostics
5.1.1. Profibus-DP master command Word
B15
B14
B13
B12
B11
B10
B9
B8
B7
B6
B5
CC = Control Code
B4
B3
B2
B1
B0
CD = Control Data
FB_DU: Modbus cyclic exchanges start-up
FB_HS_SEND: Toggle bit - New command from Profibus master
FB_HS_CONFIRM: Toggle bit – Diagnostic acknowledgement
See the detailed description of each bit in chapter Erreur ! Source du renvoi introuvable..
5.1.2. Gateway Status Word
B15 B14 B13 B12 B11 B10 B9 B8
B7 B6
EC = Error Code
B5 B4 B3
B2
B1 B0
ED = Error Data
ABC_PER: Modbus cyclic exchanges will all slaves indication
ABC_DU: Modbus cyclic exchanges activated
ABC_HS_CONFIRM: Toggle bit – Command acknowledgement
ABC_HS_SEND: Toggle bit – New gateway diagnostic
See the detailed description of each bit in chapter Erreur ! Source du renvoi introuvable..
5.2. Diagnostic and Control
The Profibus master manages the Modbus slaves activation / deactivation and the Modbus network diagnostic using
the same 2 words as those of Full Management.
Bits concerning Modbus cyclic exchanges management are inactive.
5.2.1. Profibus-DP master command Word
B15
B14
B13
B12
B11
B10
B9
CC = Control Code
B8
B7
B6
B5
B4
B3
B2
B1
B0
CD = Control Data
Reserved
FB_HS_SEND: Toggle bit - New command from Profibus master
FB_HS_CONFIRM: Toggle bit – Diagnostic acknowledgement
See the detailed description of each bit in chapter Erreur ! Source du renvoi introuvable..
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5. Gateway Initialization and Diagnostics
5.2.2. Gateway Status Word
B15 B14 B13 B12 B11 B10 B9 B8
B7 B6
EC = Error Code
B5 B4 B3 B2
B1 B0
ED = Error Data
ABC_PER: Modbus cyclic exchanges will all slaves indication
ABC_DU: Modbus cyclic exchanges activated
ABC_HS_CONFIRM: Toggle bit – Command acknowledgement
ABC_HS_SEND: Toggle bit – New gateway diagnostic
See the detailed description of each bit in chapter Erreur ! Source du renvoi introuvable..
In the "Full management" and "Diagnostic and Control" modes, it is important that you configure your Profibus
master so that it has access to the first two bytes of the gateway’s output data area, as well as to the first two
bytes of the gateway’s input data area.
WARNING
MISCONFIGURATION OF LUFP• GATEWAY’S DATA AREAS
Configure your Profibus master so that it has access to the first two bytes of the gateway’s output data area,
as well as to the first two bytes of the gateway’s input data area. Failure to configure access to these bytes
can result in an inability to stop Modbus communications, and prevent logging of error conditions for later
evaluation. Either consequence may cause unintended equipment operation.
Failure to follow this instruction can result in death, serious injury, or equipment damage.
See chapter 4.2, for more information.
5.3. Simplified Operation
The two 16-bit registers located at addresses 0x0000-0x0001 (inputs) and 0x0200-0x0201 (outputs) are no
longer used. Thus, these two addresses can be used to exchange data with the Modbus slave.
No diagnostic is sent back to the PLC. The Profibus master’s command word and the gateway’s status word do
not exist during simplified operations.
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5. Gateway Initialization and Diagnostics
5.4. Description of the Profibus-DP master command Word
The output word located at addresses 0x0200 (MSB) and 0x0201 (LSB) in the gateway’s output memory
constitutes the Profibus-DP master command word. Its structure is described below:
Bits
15
Description
FB_HS_CONFIRM: Acknowledgement bit of a gateway diagnostic
The Profibus master must compare the value of the FB_HS_CONFIRM bit to the value of the
ABC_HS_SEND bit (bit 15 in the gateway’s status word). If these two values are different, this means
that the gateway has transmitted a new diagnostic to the Profibus master.
To tell the gateway that it has read a diagnostic, the Profibus master must copy the value of the
ABC_HS_SEND bit to the FB_HS_CONFIRM bit. This allows the gateway to issue a new diagnostic.
Summary:
14
• If (FB_HS_CONFIRM = ABC_HS_SEND) Æ The gateway’s status word contains a diagnostic
which has already been acknowledged by the Profibus master. So the gateway is free to use this
status word to place another diagnostic there.
• Else Æ A new diagnostic is available in the gateway’s status word. The Profibus master can
read this diagnostic, but must also copy the value of ABC_HS_SEND to FB_HS_CONFIRM in
order to allow the gateway to generate new diagnostics.
FB_HS_SEND: Toggle bit - New command from the Profibus master
Before changing the value of FB_DU, the Profibus master must compare the values of FB_HS_SEND
and ABC_HS_CONFIRM (bit 14 of the gateway’s status word). If these two values are different, this
means that the gateway has not yet acknowledged the previous Profibus-DP master command. Else,
the Profibus master can issue a new command, updating the FB_DU bit according to the nature of its
command (shutdown or activation of Modbus exchanges), then toggling the value of the
FB_HS_SEND bit to inform the gateway that it has sent it a new command.
Summary:
• If (FB_HS_SEND ≠ ABC_HS_CONFIRM ) Æ The Profibus-DP master command word still
contains a command which has not yet been acknowledged by the gateway. So the Profibus
master cannot use this word to place a new command in it.
• Else Æ The previous command of the Profibus master has been acknowledged by the gateway,
which allows it to transmit a new command. In this case, it changes the value of the FB_DU bit,
then toggles the value of the FB_HS_SEND bit.
13
FB_DU: Modbus exchange startup
(Reserved if "Diagnostic and Control")
The setting of this bit to one by the Profibus master allows communications between the gateway and
the Modbus slaves. Resetting it to zero is used to inhibit them.
When the Profibus master sets this bit to one, it is preferable for all of the output data it has placed in
the gateway’s output memory to be up-to-date (“FB_DU” means “FieldBus – Data Updated”). If they
are not, this data will be transmitted to the Modbus slaves “as is”.
8-12
0-7
NOTE: As long as FB_DU is not set to 1 by the Profibus-DP master, the gateway does not send any Query
to the Modbus slaves. This bit is primarily used by a Profibus-DP master to prevent the gateway from
sending invalid data to them.
CC: Control Code for activation / deactivation of Modbus slave(s)
Code of the command sent by the Profibus master to the gateway in order to activate or inhibit the
communications with one or more Modbus slaves (see CC-CD table).
CD: Control Data for activation / deactivation of Modbus slave(s)
Data item associated with the CC control code (see CC-CD table).
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5. Gateway Initialization and Diagnostics
The correct use of this command word by the Profibus master, to transmit a new command to the gateway, goes
through the following steps:
• checking of (FB_HS_SEND = ABC_HS_CONFIRM). If FB_HS_SEND = ABC_HS_CONFIRM, then
• the Modbus exchange startup command (FB_DU) is updated,
• the control of the Modbus slaves (through CC and CD) is updated if the master wants to inhibit / activate one or
more slaves,
• the value of the FB_HS_SEND bit is inverted.
NOTE: It is possible to simplify this use as follows:
• The FB_DU and FB_HS_SEND bits are set to one to activate the Modbus communications.
• The FB_DU and FB_HS_SEND bits are reset to halt Modbus communications.
Though both 8-bit and 16-bit writes to the Profibus-DP master command Word are permissible in theory, writing
directly to the Profibus-DP master command word in 16-bit format can cause errors. Such 16-bit writes can
disrupt the operation of the transfer of the gateway diagnostics (undesired change to FB_HS_CONFIRM).
WARNING
RISK OF UNINTENDED EQUIPMENT OPERATION
Do not write 16-bit data directly to the Profibus-DP master command word. Writing to this word using a 16-bit
format can disrupt the transfer of Gateway diagnostics information to the master. Depending on the user’s
configuration, unintended equipment operation may result.
Instead of using 8-bit or 16-bit writes, you should write to the Profibus-DP Master Command Word on a bit-by-bit
basis. For example, to update FB_DU, you should only write the value of bit 13 (i.e. %QW4.0:X13 in the case of the
default configuration) without modifying the other bits of this word.
Failure to follow this instruction can result in death, serious injury, or equipment damage.
The values of the CC and CD fields are described in the table below:
CC
2#00000
2#10000
Description of
the command
No command
Disable a node
CD
Notes
—
The gateway inhibits all the Modbus exchanges (Commands
and Transactions) configured for the corresponding Modbus
slave.
Note: In the case of the LUFP7 default configuration, please
note that disabling the slave at address 1 (i.e. “TeSys U n°1”)
will also inhibit the two Transactions designed to read / write
any parameter of any slave.
2#10001
Enable a node (1) Modbus address
The gateway activates all the Modbus exchanges (Commands
of the slave to
and Transactions) configured for the corresponding Modbus
enable
slave.
2#10010
Enable several
Number of
The gateway activates all the Modbus exchanges (Commands
nodes (1)
Modbus slaves to and Transactions) configured for the first CD Modbus slaves
enable
and inhibits all the Modbus exchanges configured for the rest
of the Modbus slaves.
If CD is equal or greater than the total number of slaves, then
all slaves are activated.
Example: In the case of the default configuration, if CD = 5, then
the 5 first slaves (“TeSys U n°1” to “TeSys U n°5”) will be
activated while the 3 remaining slaves (“TeSys U n°6” to
“TeSys U n°8”) will be inhibited.
(1) By default, all nodes are activated. Hence, it is not necessary to enable a node that has not been disabled first.
48
—
Modbus address
of the slave to
disable
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5. Gateway Initialization and Diagnostics
5.5. Description of the Gateway Status Word
The input word located at addresses 0x0000 (MSB) and 0x0001 (LSB) in the gateway’s input memory
constitutes the gateway’s status word. Its structure is described below:
Bits
15
14
13
Description
ABC_HS_SEND: New gateway diagnostic
(See description of bit 15 of the Profibus-DP master command word, FB_HS_CONFIRM.)
ABC_HS_CONFIRM: Acknowledgement bit of a Profibus-DP master command
(See description of bit 14 of the Profibus-DP master command word, FB_HS_SEND.)
ABC_DU: Modbus exchanges activated
The gateway activates this bit to tell the Profibus master that all Modbus data located in its input
memory area has been updated at least once since the last activation of FB_DU (“ABC_DU” means
“ABC – Data Updated”). This Modbus input data includes every data in responses from all Modbus
slaves, for both periodic commands and aperiodic commands.
This bit is deactivated by the gateway when the FB_DU bit is deactivated, that is to say when the
Profibus master demands a shutdown of Modbus exchanges.
12
NOTE: Once it is active, this bit is not deactivated if there are any communication errors with the
Modbus slaves. To signal this type of error, the gateway uses bit 12 of its status word.
Periodicity of Modbus exchanges
The gateway activates this bit provided that it is periodically communicating with all of the Modbus
slaves. It deactivates it as soon as it loses communication with one of them.
The “Reconnect time (10ms)”, “Retries” and “Timeout time (10ms)” elements of each of the Modbus
queries (see chapter 6.12.2.2) are used to determine whether communication is lost, then restored.
8-11
0- 7
NOTE: If a number of periodic exchanges are configured for the same Modbus slave, only one of
them needs to remain active for the periodic communications with this slave to be declared active.
EC: Error code associated with the Modbus network
Code for the error detected on the Modbus network by the gateway and transmitted to the Profibus
master (see EC-ED table).
ED: Error data item associated with the Modbus network
Data item associated with the EC error code (see EC-ED table).
The correct use of this status word by the Profibus master, to read a diagnostic generated by the gateway, goes
through the following steps:
1) checking of (ABC_HS_SEND ≠ FB_HS_CONFIRM). If ABC_HS_SEND ≠ FB_HS_CONFIRM, then
2) the value of ABC_DU is read to determine whether all of the Modbus input data are up-to-date,
3) the value of the “Periodicity of Modbus exchanges” bit is read to determine whether the periodicity of the
Modbus communications has been maintained,
4) the values of EC and ED are read to check for any error detected by the gateway on the Modbus network
(see table below),
5) the value of the ABC_HS_SEND bit is copied to the FB_HS_CONFIRM bit.
This last step is very important if the system is designed to read the gateway diagnostics and perform some
action depending on the result. Copying of the value of the ABC_HS_SEND bit to the FB_HS_CONFIRM bit
allows the gateway to transmit a future diagnostic, preventing the loss of subsequent error information.
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5. Gateway Initialization and Diagnostics
WARNING
RISK OF UNINTENDED EQUIPMENT OPERATION
The user must ensure the Profibus master programming concludes read operations by copying the value of the
ABC_HS_SEND bit to the FB_HS_CONFIRM bit. If this step is omitted in applications where gateway
diagnostics will be read and acted upon, future diagnostics information will be blocked. Depending on the
user’s configuration, unintended equipment operation may result.
For example, the disappearance of a Modbus slave (EC = 2#0001) may have perturbing consequences on the
communications with the other slaves, due to the future reconnection attempts and timeouts with this faulty Modbus
slave. As a consequence, and depending on the needs of your application, it may be very important for the ProfibusDP master to acknowledge each diagnosis in order to be informed as soon as possible of the disappearance of a
slave. Thus, your application could take measures to react accordingly (e.g. by inhibiting the faulty slave with CC and
CD of the Gateway Command Word).
Failure to follow this instruction can result in death, serious injury, or equipment damage.
The values of the EC and ED fields are described in the table below:
EC
2#0000
2#0001
2#0010
2#0011
Description of the error
Re-transmissions on the
Modbus network
A Modbus slave is missing
Several Modbus slaves
are missing
Excessive data in a
Modbus response
2#0100
Unknown Modbus error
2#1111
Absence of error
ED
Number of
re-transmissions
Address of the missing
Modbus slave
—
Notes
Total number of re-transmissions carried out
on the sub-network, for all slaves.
—
—
Address of the Modbus This error occurs when the gateway receives too
slave involved
much data in the response sent by one of its
Modbus slaves.
Address of the Modbus —
slave involved
—
This is a “no-error” code used by the gateway
whenever the Modbus communications are
OK. It is typically used when previously absent
Modbus slaves are back on the sub-network.
The re-transmission counter used to signal this error is not reset when the gateway generates this error code. If
there are recurrent communication problems on the Modbus network, the gateway will generate this same
diagnostic repeatedly, so as to tell the Profibus master the total number of re-transmissions carried out as often
as possible. This counter is reset when its value exceeds its maximum value (counter modulo 256: 0xFF Æ
0x00).
In the case of disconnection of one or several devices on the Modbus sub-network, the LUFP7 gateway will first
report re-transmission errors several times and then the error “A Modbus slave is missing” or “Several Modbus
slaves are missing”. Later on when the LUFP7 makes a reconnection attempt, only the re-transmission error will
be reported. Due to this, the indication of the errors “A Modbus slave is missing” or “Several Modbus slaves are
missing” may be perceived as very brief.
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Each part of this chapter describes a separate step allowing the user to personalize the gateway configuration,
according to his own particular needs. Each part gives an introduction to a basic operation isolating it from the
rest of the configuration and describing the operations to be carried out using ABC-LUFP Config Tool (mainly)
and SyCon (where necessary), and their implications for the gateway’s general behaviour.
In each case, the first two steps are required, as they allow you to establish the dialogue between the gateway
and the PC software allowing you to configure it, that is to say ABC-LUFP Config Tool.
We strongly recommend that you read chapter 4, because all of the operations carried out in ABC-LUFP Config
Tool or SyCon are based on the principle that we are using the default configuration of the LUFP7 gateway.
6.1. Connecting the Gateway to the Configuration PC
This step is required when setting up the gateway configuration application, ABC-LUFP Config Tool.
Connecting the gateway to one of the serial (COM) ports on a PC requires a straight PowerSuite cable and a
RS232/RS485 converter. These two items are the same as those allowing dialogue with drives and soft startsoft stop units using the PowerSuite application and are both available from the catalogue (ref.: VW3 A8 106).
Ensure that you use the “POWERSUITE” cable and the “RS232 / RS485 PC” converter. An “ATV28 before 09 /
2001” cable and an “ATV 58” converter are also supplied with these items, but they should not be used with the
LUFP7 gateway.
LUFP7 gateway (Seen from underneath)
Configuration
PC
RS485
RJ45
VW3 A8 106
Male
SubD 9
RS232
(COM)
RJ45
Straight POWERSUITE cable
Female
SubD 9
RS232 / RS485
convertor
Once the gateway has been connected to a PC with the PowerSuite cable and the RS232/RS485 converter, you
can change its configuration using “ABC-LUFP Config Tool”. This configurator also allows you to carry out a few
diagnostics on the gateway.
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6. Configuring the Gateway
6.1.1. Pin Outs
— LUFP7 (Configuration) —
Female RJ45
Male RJ45
RS-485 D(B)
RS-485 D(A)
+10 V
GND
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
8
D(B)
D(A)
+10 V
0V
Straight POWERSUITE cable
——— RS485 / RS232 converter ———
Male RJ45
Female RJ45
1
1
2
2
3
3
D(B)
4
4
D(B)
D(A)
5
5
D(A)
6
6
+10 V
7
7
0V
8
8
–—— PC (COM) ——–
Female 9-point SUB-D
Male 9-point SUB-D
1
1
Tx
2
2
RS-232 Rx
Rx
3
3
RS-232 Tx
4
4
5
5
6
6
+10 V
7
7
0V
8
8
9
9
GND
GND
NOTE: The inversion of the Rx and Tx signals between the gateway and the PC is shown on the 9-point SUB-D
connectors, because beyond this junction, the RS-232 signals are replaced by the D(A) and D(B) polarizations
of the RS-485 signals.
6.1.2. RS-232 Link Protocol
There is no need to configure the PC’s COM port, as ABC-LUFP Config Tool uses a specific setup which
replaces the one for the port being used. This replacement is temporary and is cancelled as ABC-LUFP Config
Tool stops using this serial port, that is to say when ABC-LUFP Config Tool is closed.
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6.2. Installing ABC-LUFP Config Tool
The minimum system requirements for ABC-LUFP Config Tool are as follows:
•
•
•
•
•
Processor .......................................Pentium 133 MHz
Free hard disk space......................10 Mb
RAM................................................08 Mb
Operating system ...........................MS Windows 95 / 98 / ME / NT / 2000 / XP
Browser ..........................................MS Internet Explorer 4.01 SP1
The ABC-LUFP Config Tool installation program can be found on the http:///www.schneider-electric.com
website. To install it, run “ABC-LUFP153.exe”, then follow the on-screen instructions.
You can read about how to use ABC-LUFP Config Tool in a user manual entitled AnyBus Communicator –
User Manual: “ABC_User_Manual.pdf”. We strongly recommend that you read this manual when using ABCLUFP Config Tool, because this guide will only describe the various features it provides in relation to using the
LUFP7 gateway.
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6. Configuring the Gateway
6.3. Connecting to / Disconnecting from the Gateway
In ABC-LUFP Config Tool, the connection to the gateway must be performed manually.
But first, you should check which serial port ABC-LUFP Config
Tool will use for this connection. In the “Tools” menu, the “Port”
sub-menu will reveal which serial ports (COM1, COM2, etc.) are
currently available. If several COM ports are available, select, in
this sub-menu, the port you intend to use for connecting to and
configuring the gateway.
An example is given on the right:
NOTE: If all the serial ports of your PC are already used by other applications, you must first close ABC-LUFP
Config Tool, then “free” a serial port by disconnecting, closing, or terminating an application that currently uses a
serial port. Afterward, restart ABC-LUFP Config Tool because COM ports are only scanned during its start-up;
the freed COM port should now be useable by it.
To connect ABC-LUFP Config Tool to the gateway:
• right-click on the “ABC-LUFP” element and click on “Connect” in the popup menu that appears, or
• select the “ABC-LUFP” element and choose “Connect” in the “ABC-LUFP” menu, or
• click on the
button.
Once connected, you can disconnect ABC-LUFP Config Tool from the gateway by:
• right-clicking on the “ABC-LUFP” element and clicking on “Disconnect” in the popup menu that appears, or
• selecting the “ABC-LUFP” element and choosing “Disconnect” in the “ABC-LUFP” menu, or
• clicking on the
button.
The rightmost part of the status bar of ABC-LUFP Config Tool displays its current connection mode:
“On-line” mode (the left LED is green)
“Off-line” mode (the right LED is red)
In “On-line” mode, ABC-LUFP Config Tool periodically polls the gateway in order to detect if the gateway has been
disconnected.
When an unwanted disconnection does occur, ABC-LUFP Config Tool goes to
“Off-line” mode (the red LED is displayed) and automatically retries to connect
itself to the gateway. The “Searching for ABC-LUFP” window is visible for the
whole duration of this search.
If the search fails, ABC-LUFP Config Tool asks the user “No Module was found, retry?”.
• Should the user select the “Cancel” button, ABC-LUFP Config Tool remains in “Off-line” mode.
• Should he select the “Retry” button, ABC-LUFP Config Tool resumes the search for an ABC-LUFP gateway.
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6.4. Importing the Gateway Configuration
Before you can make any changes to the gateway configuration, you will first need to import its current
configuration. If you already have this configuration on your hard disk, all you will need to do is open the file
corresponding to this configuration.
Check that the gateway has a valid configuration and that it is working properly, that is to say that LED s
GATEWAY is flashing green (see page 25)
In ABC-LUFP Config Tool, choose “Upload configuration from
button, in
ABC-LUFP” from the “File” menu or click on the
the ABC-LUFP Config Tool toolbar. A window called “Upload”
will then open and a progress bar shows you the state of
progress of the gateway configuration uploading process. This
window disappears as soon as the whole configuration has
been successfully uploaded.
This step is particularly important if you wish to read details about the content of the gateway’s default
configuration, after unpacking it. You can then use this configuration as a template for any changes you wish to
make subsequently, thus avoiding having to create all of the items and reducing the potential risk of error.
NOTE:
ƒ Save this configuration to your hard disk so that it is always available. This will allow you to reconfigure
the gateway “cleanly” should the configuration become invalid.
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6. Configuring the Gateway
6.5. Transferring a Configuration to the Gateway
When using ABC-LUFP Config Tool, you can transfer the configuration you are editing to the gateway at any
time.
Choose “Download configuration to ABC-LUFP” from the “File”
menu or click on the
button, in the ABC-LUFP Config Tool
toolbar.
ABC-LUFP Config Tool initializes a check test of the gateway
type.
NOTE: During this very fast test, the PC should not carry out
any other operations, as this could lead to ABC-LUFP Config
Tool apparently freezing up and slow down the PC’s general
operation for several minutes. After the test is complete, the
PC will return to full speed, and may be used normally.
Once this test has finished, a window called “Download” opens
and a progress bar shows the state of progress for the transfer of
the configuration to the gateway.
NOTE: Do not interrupt this operation, otherwise you will have
to start it again from the beginning.
Check that the transfer has been correctly carried out: LED s GATEWAY should be flashing green (see page 25).
If this LED is flashing red/green, save the configuration you were editing, open the file containing the default
configuration for LUFP7 gateways, then transfer it to the gateway. This will restore it to a known initial state. You
can then continue with the configuration you were transferring, and make any corrections which may be
necessary.
If the gateway and its master DPM1 are both connected via a Profibus-DP network, LED q FIELDBUS DIAG (see
page 25) will begin to flash red at a frequency of 1 Hz if changes have to be made under SyCon. This occurs if you
change the total size of the input data and/or the total size of the output data exchanged with the Modbus slaves.
6.6. Monitoring the Content of the Gateway’s Memory
One of the main commands that you will need to use when setting up the gateway is the command allowing you
to read the contents of the gateway’s memory and to display it in a window used for this purpose. This will be
particularly useful when you are working on your PLC configurations and applications. However, it only shows
data from the “Data” and “Preset Data” fields (and also those from the “Variable Data” fields, reserved for the
Transactions) configured in the “Query” and “Response” elements of just one of the Modbus slaves, plus the
content of the gateway’s two reserved registers, located at memory addresses 0x0000-0x0001 (gateway status
word) and 0x0200-0x0201 (Profibus-DP master command word).
To monitor the content of the gateway’s memory, start by selecting the node corresponding to the Modbus slave
whose data you wish to view, then choose “Monitor” from the menu whose name corresponds to the name of the
previously selected node. A monitoring window then appears. The sample window shown below corresponds to
a view of the contents of the memory exchanged, using the gateway’s default configuration, with the “TeSys U
n°1” motor starter.
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6. Configuring the Gateway
The upper part of this window allows you to choose a Modbus command, to edit its contents, then to send it to
the Modbus network (“Command” menu). The response will then be displayed in this same part. Please see
chapter 2.10 Node monitor in the ABC-LUFP Config Tool user manual, entitled AnyBus Communicator – User
for further information about how to use this window.
The lower part of this window allows you to view the content of the gateway’s memory, but only the bytes used in
frames for queries and responses frames for commands and transactions configured for the selected node. The
values of the gateway’s two reserved words (addresses 0x0000-0x0001 and 0x0200-0x0201) are also shown,
whichever node is selected.
In the window shown above, the data displayed correspond to the values at the memory locations designated by
the “Data” fields in the commands and transactions configured for the “TeSys U n°1” node, that is to say the
following commands: “Read Holding Registers”, “Preset Multiple Registers”, “Transactions 1”, and “Transactions 2”.
NOTE: The data exchanged with the Modbus slave previously selected are displayed MSB-first, that is in the
MSB / LSB order (as read from left to right, with growing memory addresses), provided that the “Byte Swap”
option from the “Data”, “Preset Data”, or “Variable Data” element of the corresponding Modbus command was
set to “No swapping” (see chapter 6.12.2.4). This also holds true for the two reserved words dedicated to the
management of the downstream Modbus network.
However, but only as far as the “TeSys U n°1” node is concerned, the data beginning at addresses 0x0013,
0x0018, 0x0212, and 0x0218 (see Appendix C:, Content of the Gateways’s DPRAM Memory paragraph) follow
the same byte order than the content of the frames they are related to (see Appendix F: Modbus Commands),
from first to last byte (checksum excluded), and following growing adresses in the memory of the gateway.
Finally, bytes 0x001E, 0x001F, 0x021E, and 0x021F correspond to the reception and emission counters for
these frames (“Trigger bytes” from Transactions 1 and 2).
A brief description of the toolbar buttons of this window is given below:
Stop / Start communications with the selected node (see “Node” menu, below)
Select / Send the Modbus command shown in the upper part of the window (see “Command”
menu, below)
Stop / Resume refreshing the data displayed in the lower part of the window
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6. Configuring the Gateway
The menus of this window allow the user to perform the following actions:
• “File” menu:
- The “Exit” command closes the “Monitor” window, thus returning to ABC-LUFP
Config Tool.
• “Node” menu:
- The “Start Node” command restarts all the communications configured for the node
currently monitored. Since a node is active by default, this command is only useful if
the node has been explicitly stopped by the user with the “Stop Node” command (or
with one of the commands described in chapter Erreur ! Source du renvoi
introuvable., using the CC and CD fields).
- The “Stop Node” command stops all the communications configured for the node
currently monitored. This means that all Commands and Transactions configured for
the node are inhibited. Please note that in the case of the first node of the LUFP7
default configuration (the “TeSys U n°1” slave), this will also inhibit the two
Transactions designed to read / write any parameter of any slave.
Note: The Stop / Start Node commands can be particularly useful when used to
isolate one or more nodes in order to investigate Modbus communication problems.
• “Command” menu:
- The “Select Command” command opens a “Select Command” window that enables
the user to select a Modbus command (see chapter 6.12.2.
• ). Once selected, the Query and Response frames of this command will be displayed in the upper part of the
“Monitor” window. The user can then edit the value associated with each field of the
Query frame before sending the command with the “Send Command” command
(see below).
- The “Send Command” command triggers the emission of the Query displayed in the
upper part of the “Monitor” window. As soon as a Modbus Response will be received
by the gateway, ABC-LUFP Config Tool will display its contents in the upper part of
the “Monitor” window.
• “Columns” menu:
- The “Free” choice configures the three monitoring columns (“In Area”, “Out Area”,
and “General Area”) to automatically adjust their width on a 1-byte unit (1 byte, 2
bytes, 3 bytes, etc.) each time the user modifies the width of the “Monitor” window.
- The “8 Multiple” choice configures the three monitoring columns to automatically
adjust their width on an 8-byte unit (8 or 16 bytes) each time the user modifies the
width of the “Monitor” window.
•
- The “Hex” choice configures the three monitoring columns to display all monitored
values and memory addresses in Hexadecimal.
- The “Decimal” choice configures the three monitoring columns to display all
monitored values and memory addresses in Decimal.
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“View” menu:
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6.7. Deleting a Modbus Slave
This step allows you, for instance, to free up a location on the downstream Modbus network, known as the “SubNetwork” in ABC-LUFP Config Tool, in order to replace one Modbus slave with another.
In fact the gateway’s default configuration allows it to communicate with eight TeSys U motor starters, which is
the maximum number of Modbus slaves.
If the gateway is used to manage exchanges on a Modbus network with fewer than eight TeSys U motor
starters, it is preferable to delete the redundant TeSys U motor starters from the gateway. You should carry out
this operation using ABC-LUFP Config Tool.
If you are using the aperiodic read/write services, keep in mind that these services are configured using the
memory space of the first configured TeSys U Motor starter. Therefore, deleting the first configured TeSys U
Motor starter can also result in the deletion of the aperiodic read/write services.
WARNING
LOSS OF APERIODIC COMMUNICATIONS
Do not delete the first configured TeSys U motor starter if you are using the aperiodic read/write services.
Deleting this first device will also delete the aperiodic services. Because these services allow communication
with all of the configured Modbus devices, and not just the first device, you may lose communications with all
devices, leading to unintended equipment operation.
Failure to follow this instruction can result in death, serious injury, or equipment damage.
Procedure for deleting a Modbus slave
1) Select the node corresponding to the Modbus slave you wish to delete from the configuration. If this is the
only node remaining in the configuration, you will not be able to delete it, as the downstream Modbus network
must include at least one slave.
2) Right click on the icon or the name of this Modbus slave. A menu pops up underneath the mouse cursor.
or
In the ABC-LUFP Config Tool main menu, pull down the menu whose name corresponds to the name of the
previously selected node.
3) On this menu, click on “Delete”. The confirmation window shown below then appears, asking you to either
confirm that you want to delete the selected node (“TeSys U n°2” in the example shown here) or cancel the
operation.
4) If you confirm that you want to delete the node,
the menu disappears, along with the previously
selected node. Otherwise, the node will still be
there once the window disappears.
Keyboard shortcut: “Del” key.
Adjusting the gateway’s memory (optional step):
The data previously exchanged between the gateway and the Modbus slave which has just been deleted will
free up locations in the gateway’s memory. If you want to optimize the exchanges between the gateway’s
memory and the master PLC Profibus-DP coupler inputs/outputs, you will need to change the configuration of all
the other Modbus slaves in order to adjust the content of the gateway’s memory.
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6. Configuring the Gateway
However, these operations are not necessary when deleting a single slave. Conversely, they become almost
essential when most of the Modbus slaves are deleted, because these deletions divide up the gateway’s
memory.
Please see chapter 6.12, which describes all of the changes you can make to the configuration of each of the
Modbus commands.
6.8. Adding a Modbus Slave
This operation allows you to add a Modbus slave whose type is different from those of the other Modbus slaves in the
configuration. On the other hand, if the slave type is the same as one of the previously configured slaves, it is
preferable to copy this slave rather than to create a new one.
An additional import/export feature also allows you to individually save the complete configuration of a Modbus
slave, in order to have access to it in ABC-LUFP Config Tool, from any configuration and at any time.
These two features are only available provided that there are less than 8 Modbus slaves declared, which is not
the case in the default configuration, as it comprises 8 TeSys U motor starters.
Adding a new type of Modbus slave:
Use one of the two methods shown below:
a) Select “Sub-Network”, then choose “Add Node” from the “Sub-Network” menu. A new node is added after all
the other configured nodes. By default, its name is “New Node”.
b) Select one of the nodes located under the “Sub-Network” element, then choose “Insert New Node” from the
menu whose name corresponds to the name of the selected node. A new node is added just before the
selected node. By default, its name is “New Node”.
All of the steps in configuring the new node are described in chapter 6.11.
Copying a previously configured Modbus slave:
Select the node corresponding to the slave whose configuration you want to copy, then choose “Copy” from the
menu whose name corresponds to the name of the selected node. Keyboard shortcut: “Ctrl C”.
Then use one of the two methods shown below:
a) Select “Sub-Network”, then choose “Paste” from the “Sub-Network” menu. A new node is added after all the
other configured nodes. Its name and its whole configuration are identical to that of the node you copied.
Keyboard shortcut: “Ctrl V”.
b) Select one of the “Sub-Network” nodes, then choose “Insert” from the menu whose name corresponds to the
selected node. A new node is added just before the one which is selected. Its name and its whole
configuration are identical to that of the node you copied.
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As the new node and the original node are identical in every way, you will need to change (1) the name of the
node, (2) the address of the corresponding Modbus slave and (3) the location of the data exchanged between
the gateway’s memory and this Modbus slave. All of these operations are described in chapter 6.11, and in
chapter 6.12.
WARNING
DUPLICATE MODBUS ADDRESSES OR GATEWAY MEMORY RANGES
If the user chooses to add a Modbus slave by copying the configuration of an existing Modbus slave, the user
must change the added device’s Modbus address and the memory locations it uses to exchange data with
the gateway. Duplicated Modbus addresses or gateway memory locations may result in communications
errors, incorrect information being written to a slave’s registers, or in writing the registers of an unintended
device. Any of these errors may result in unintended equipment operation.
Failure to follow this instruction can result in death, serious injury, or equipment damage.
Importing/exporting a Modbus slave configuration:
ABC-LUFP Config Tool offers the possibility of independently saving and loading the configuration of a node on
the downstream “Sub-Network”. For instance, this will allow you to build a library of Modbus slave templates, so
that you can use them in any configuration.
To save the configuration of a Modbus slave, select the node it corresponds to, then choose “Save Node” from
the menu whose name corresponds to the name of the selected node. A dialog box will then appear asking you
to save the configuration (export in XML format).
To insert a node using the XML file containing a Modbus slave configuration as a template, use one of the two
methods shown below:
a) Select “Sub-Network”, then choose “Load Node”. A dialog box asks you to choose a file containing a Modbus
slave configuration (import in XML format). A new node is added after all the other configured nodes. Its
name and its whole configuration are identical to those of the Modbus slave, as it was configured when it was
saved.
b) Select one of the “Sub-Network” nodes, then choose “Insert from File” from the menu whose name
corresponds to the name of the selected node. A new node is added just before the selected node. Its name
and its whole configuration are identical to those of the Modbus slave, as it was configured when it was
saved.
You will then change (1) the name of the node, (2) the address of the corresponding Modbus slave and (3) the
location of the data exchanged between the gateway’s memory and this Modbus slave. All of these operations
are described in chapter 6.11, and in chapter 6.12.
WARNING
DUPLICATE MODBUS ADDRESSES OR GATEWAY MEMORY RANGES
If the user chooses to add a Modbus slave by copying the configuration of an existing Modbus slave, the user
must change the added device’s Modbus address and the memory locations it uses to exchange data with
the gateway. Duplicated Modbus addresses or gateway memory locations may result in communications
errors, incorrect information being written to a slave’s registers, or in writing the registers of an unintended
device. Any of these errors may result in unintended equipment operation.
Failure to follow this instruction can result in death, serious injury, or equipment damage.
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6. Configuring the Gateway
6.9. Changing the Periodic Data Exchanged with a Modbus Slave
This operation consists of replacing, adding or deleting periodic data exchanged with one of the Modbus slaves.
With each of these operations, we shall take the default configuration of the LUFP7 gateway as an example, that
is to say that any changes previously made will have been cancelled at the start of each operation. In addition,
the operations to be carried out are shown as part of a targeted example.
Do not forget to save the changes you have made, or to transfer the whole configuration to the gateway. This will
allow you to check that the configuration is valid, as the gateway automatically verifies the configuration when it
is downloaded.
6.9.1. Replacing a Periodic Input Data Element
We will use the node corresponding to. “TeSys U n°3” motor starter for our example. We are trying to replace the
monitoring of the “TeSys U Status Register” (address 455 = 0x01C7) with the monitoring of the “1st Fault
Register” (address 452 = 0x01C4).
The operation consists of changing the value of the “Starting register address” element of the “Query” from the
“Read Holding Registers” command (Modbus command for reading the values of a number of registers).
Select this element, then change its value as shown below. You can enter the address of the parameter in
decimal format. ABC-LUFP Config Tool will automatically convert it to hexadecimal.
This operation in no way changes the content of the gateway’s memory, because we do not need to change the
values of the “Data length” and “Data location” fields of the “Data” element of the “Response” to the
aforementioned command. So no additional operations will be necessary, either in ABC-LUFP Config Tool, or in
SyCon.
On the other hand, the Profibus-DP master PLC software will have to take account of the change in the nature of
the corresponding input. In Appendix C:, Input Data Memory Area paragraph, the description of the word located
at address 0x0006 becomes “value of the motor starter e 1st default register”. This word corresponds to the
PLC input word %IW4.0.3 (see chapter 4.2.9).
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6.9.2. Replacing a Periodic Output Data Element
We will use the node corresponding to “TeSys U n°6” motor starter for our example. We will replace the control
of the “Command Register” (address 704 = 0x02C0) with the control of the “2nd Command Register”
(address 705 = 0x02C1).
The operation consists of changing the value of the “Starting register address” element in the “Query” and the one
of the “Preset Multiple Registers” command (Modbus command for writing values of a number of registers) in the
“Response”.
Select “Starting register address” from the “Query”, then change its value as shown below. You can enter the
address of the parameter in decimal format. ABC-LUFP Config Tool will automatically convert it to hexadecimal.
Do the same for the “Starting Address” element of the “Response” because the gateway checks the value
of this field when it receives each Modbus response. If the value does not correspond to that of the query, the
gateway will ignore the response.
This operation in no way changes the content of the gateway’s memory, because we do not need to change the
values of the “Data length” and “Data location” fields of the “Data” element of the “Query”. So no additional
operations will be necessary, either in ABC-LUFP Config Tool, or in SyCon.
On the other hand, the Profibus-DP master PLC software will have to take account of the change in the nature of
the corresponding output. In Appendix C:, Output Data Memory Area paragraph, the description of the word
located at address 0x020C becomes “value of the motor starter h 2nd command register”. This word
corresponds to PLC output word %QW4.0.6 (see chapter 4.2.9).
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6. Configuring the Gateway
6.9.3. Increasing the Amount of Periodic Input Data
We will use the node corresponding to “TeSys U n°2” motor starter for our example. We will complete the
monitoring of this motor starter starting from the currently monitored register, that is to say “TeSys U Status
Register” (address 455 = 0x01C7), and going as far as the “Reserved: 2nd Warning Register”
(address 462 = 0x01CE). The number of registers monitored is therefore increased from 1 to 8.
In this case, there are quite a lot of operations to be carried out. They are described in order below:
1) Changing the number of registers monitored: This step consists of changing the value of “Number of registers”
element of the “Query” from the “Read Holding Registers” command (Modbus command for reading the
values of a number of registers). Select this element, then change its value as shown below. ABC-LUFP
Config Tool will automatically convert any value entered in decimal to hexadecimal.
2) Changing the number of data bytes in the Modbus response: The number of bytes read from the “TeSys U
n°2” motor starter memory increases from 2 to 16, as the number of registers monitored has increased from 1
to 8. Select the “Byte count” element from the “Response” and change its value as shown below. ABC-LUFP
Config Tool will automatically convert any value entered in decimal to hexadecimal.
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3) Changing the location of the Modbus data received in the gateway’s memory: As the number of bytes read
(see previous step) has increased from 2 to 16, the Modbus data received must be placed at a different
location in the gateway’s memory, and the size of the memory occupied must also be adjusted appropriately.
If you are not certain how much of the gateway’s memory is currently occupied, select “Sub-Network” and
choose “Monitor” from the “Sub-Network” menu. The following window appears, allowing you to see how
much of the gateway’s memory is occupied.
To see which memory locations are occupied by data from the command you are interested in, uncheck the
box corresponding to the “Read Holding Registers” command from the “TeSys U n°2” node, as shown above.
We can see that the Modbus data received in response to this command occupy 2 bytes located from
address 0x0004.
NOTE:
ƒ
The memory locations 0x0000 and 0x0001 are reserved (see chapter 5). So you will not be able to
place any Modbus data in these locations.
ƒ
The sizes displayed above the graphics areas of this window (“In Area 32 bytes” and “Out Area
32 bytes”) correspond to the total input and ouput sizes you must configure using the modules
presented under SyCon (see point 6).
You may wish to place the 16 bytes of Modbus data which will be received by the gateway for this command
into memory once you have made the changes. There are two methods:
1) Move all the other data by 14 bytes – which may be a tedious process
2) Change the memory location of the block of data received.
The first solution is preferable as it avoids leaving any “holes” in the gateway’s memory, thus optimising the
transfer of all data to the Profibus-DP master PLC. The TSX PBY 100 coupler may exchange up to 242 input
words with Profibus-DP slaves. If communication with a larger number of slaves is required, limit the volume
of exchanges with the LUFP7 gateway. In that case, leaving such "blanks" in the gateway memory is not
advisable.
For this example, we will use the second method and place the 16 bytes of data form address 0x0020 (32 in
decimal).
This is directly after the input data for the gateway’s default configuration.
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6. Configuring the Gateway
Close the “Sub-network Monitor” window, then once you are back in the main ABC-LUFP Config Tool
window, select the “Data length” and “Data location” fields of the “Data” element from the “Response” one
after another and change their values as shown below. ABC-LUFP Config Tool will automatically convert any
value entered in decimal to hexadecimal.
To check that these changes have been entered into the configuration, choose “Monitor” from the “SubNetwork” menu again:
4) Transferring this configuration to the gateway: Please see chapter Erreur ! Source du renvoi introuvable..
Check that the configuration is valid (LED s GATEWAY flashing green). However, the gateway configuration is
now different from the one taken into account by the Profibus-DP coupler with respect to the gateway
(difference in the total length of input data), the LED q FIELDBUS DIAG therefore becomes flashing red at a
frequency of 1 Hz, providing that the gateway is connected to the Profibus-DP network and to its DPM1
master.
5) Saving this configuration to your PC’s hard disk: See chapter 4.2.7.
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6) Changing the amount of data received by the Profibus-DP coupler: Under SyCon, change the list of modules
configured for the gateway (see chapter 4.2.6). Since we have added 16 bytes after the input data in the
gateway memory, the coupler should be configured to receive a block of input data with 16 bytes more from
the gateway.
In this case, add an “INPUT: 16 Byte (8 word)” module after the module configured for the gateway, as the
number of input bytes in the default configuration is even (word-aligned).
Then you should save and export the configuration of the Profibus-DP network, as described in chapter
4.2.7.
7) Configuring the Profibus-DP master PLC inputs: under PL7 PRO, import the new configuration of the
Profibus-DP network (see chapter 4.2.8 and following chapters). Words %IW4.0.16 to %IW4.0.23 are now
displayed in the "PROFIBUS-DP slave data” frame of the TSX PBY 100 coupler configuration window.
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6. Configuring the Gateway
We get a correspondence derived from the one used for the gateway default configuration. The changes in
relation to the default configuration are shown by a greyed-out background, like the “free memory locations”.
Service
PLC input
Managing the downstream Modbus network
%IW4.0.00
%IW4.0.10
%IW4.0.20
%IW4.0.30
%IW4.0.40
%IW4.0.50
%IW4.0.60
%IW4.0.70
%IW4.0.80
%IW4.0.90
Periodic communications
—
Monitoring of
TeSys U motor starters
Aperiodic communications
—
Reading the value of a motor starter
parameter (RESPONSE)
Aperiodic communications
—
Writing the value of a motor starter
parameter (RESPONSE)
Aperiodic communications
(“Trigger bytes” for the responses)
Periodic communications
—
Monitoring of
TeSys U motor starter d
%IW4.0.10
%IW4.0.11
%IW4.0.12
%IW4.0.13
%IW4.0.14
%IW4.0.15
%IW4.0.16
%IW4.0.17
%IW4.0.18
%IW4.0.19
%IW4.0.20
%IW4.0.21
%IW4.0.22
%IW4.0.23
Description
Bit 15 ....................Bit 8 Bit 7 ...................... Bit 0
Gateway status word
Value of the motor starter c status register
Free memory location
Value of the motor starter e status register
Value of the motor starter f status register
Value of the motor starter g status register
Value of the motor starter h status register
Value of the motor starter i status register
Value of the motor starter j status register
Free memory location
Slave no. (0x01-0x08)
Function number
Number of bytes
(0x03)
read (0x02)
Value of the parameter read (0xxxxx)
Slave number
Function number
(0x01 to 0x08)
(0x06)
Address of the parameter written (0xxxxx)
Value of the parameter written (0xxxxx)
Read parameter
Write parameter
response counter
response counter
Value of the “TeSys U Status Register”
Value of the “Complementary Status Register”
Value of the “K7 Status Register”
Value of the “K7 Status Register 2 (free format)”
Value of the “K7 Status Register 3 (free format)”
Value of the “Warning Number” register
Value of the “Warning Register”
Value of the “Reserved : 2nd Warning Register”
8) Transferring the Profibus-DP coupler configuration: Once changes have been made to the Profibus-DP
coupler configuration, it is necessary to validate the hardware configuration of the PLC rack, and to transfer
the whole application to the Premium PLC on which the coupler is located. Please see chapter 4.2.12.
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6.9.4. Increasing the Amount of Periodic Output Data
We will use the node corresponding to “TeSys U n°4” motor starter for our example. By default, we are
controlling Command Register 704. To add control of Command Register 705, we will carry out the following
operations.
1) Changing the number of registers controlled: This step consists of changing the value of the “Number of
registers” in the “Query” and the one for the “Preset Multiple Registers” command (Modbus command for
writing values of a number of registers) in the “Response”. Start by selecting “N° of Registers” from the
“Query”, then change its value as shown below. ABC-LUFP Config Tool will automatically convert any value
entered in decimal to hexadecimal. Do the same for the “N° of Registers” element of the “Response” because
the gateway checks the value of this field when it receives each Modbus response. If the value does not
correspond to that of the query, the gateway will ignore the response.
2) Changing the number of data bytes in the Modbus query: The number of bytes written into the memory of the
“TeSys U n°4” motor starter memory increases from 2 to 4, as the number of registers controlled has
increased from 1 to 2. Select the “Byte count” element from the “Query” and change its value as shown
below. ABC-LUFP Config Tool will automatically convert any value entered in decimal to hexadecimal.
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6. Configuring the Gateway
3) Changing the location of the Modbus data transmitted into the gateway’s memory: As the number of bytes
written (see previous step) has increased from 2 to 4, the Modbus data to be transmitted to the “TeSys U n°4”
motor starter must be placed at a different location in the gateway’s memory, and the size of the memory
occupied must also be adjusted appropriately.
If you are not certain how much of the gateway’s memory is currently occupied, select “Sub-Network” and
choose “Monitor” from the “Sub-Network” menu. The window shown below appears, allowing you to see how
much of the gateway’s memory is occupied.
To see which memory locations are occupied by data from the command you are interested in, uncheck the
box corresponding to the “Preset Multiple Registers” command from the “TeSys U n°4” node, as shown
above. We can see that the Modbus data transmitted with the query corresponding to this command occupy
2 bytes located from address 0x0208.
NOTE:
ƒ Memory locations 0x0200 and 0x0201 are reserved (see chapter 5). So you will not be able to place any
Modbus data in these locations.
ƒ The sizes displayed above the graphics areas of this window (“In Area 32 bytes” and “Out Area
32 bytes”) correspond to the total input and ouput sizes you must configure using the modules
presented under SyCon (see point 6).
You may wish to place the 4 bytes of Modbus data which will be transmitted by the gateway for this command
into memory, once the changes have been made. There are two methods:
1) Move all the other output data by 2 bytes – which may be a tedious process
2) Change the memory location of the block of data transmitted.
The first solution is preferable as it avoids leaving any “holes” in the gateway’s memory, thus optimising the
transfer of all of the data from the Profibus-DP master PLC. The TSX PBY 100 coupler can exchange up to
242 output words with Profibus-DP slaves. If communication with a larger number of slaves is required, limit
the volume of exchanges with the LUFP7 gateway. In that case, leaving such "blanks" in the gateway
memory is not advisable.
For this example, we will use the second method. This is directly after the input data for the gateway’s default
configuration.
When selecting a value for the “Data Location” field, data must be located at even addresses in order to align
the Modbus data (in 16-bit format) on the %QW4.0.x outputs of the Profibus-DP TSX PBY 100 coupler.
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WARNING
RISK OF UNINTENDED EQUIPMENT OPERATION
The user must use even values for the “Data Location” field. The selection of odd data values complicates
application programming and increases the likelihood of improper Modbus values being written to or read
from the slave devices. Depending on the user’s configuration, unintended equipment operation may result.
Failure to follow this instruction can result in death, serious injury, or equipment damage.
Returning to our previous example, we will place the 4 bytes of data from address 0x0220 (544 in decimal).
Close the “Sub-network Monitor” window, then once you are back in the main ABC-LUFP Config Tool
window, select the “Data length” and “Data location” fields of the “Data” element from the “Query” one after
another and change their values as shown below. ABC-LUFP Config Tool will automatically convert any
value entered in decimal to hexadecimal.
To check that these changes have been entered into the configuration, choose “Monitor” from the “SubNetwork” menu again:
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6. Configuring the Gateway
4) Transferring this configuration to the gateway: Please see chapter Erreur ! Source du renvoi
introuvable.. Check that the configuration is valid (LED s GATEWAY flashing green). However, the gateway
configuration is now different from the one taken into account by the Profibus-DP coupler with respect to the
gateway (difference in the total length of input data), the LED q FIELDBUS DIAG therefore becomes flashing
red at a frequency of 1 Hz, providing that the gateway is connected to the Profibus-DP network and to its DPM1
master.
5) Saving this configuration to your PC’s hard disk, see chapter 4.2.7.
6) Changing the number of data transmitted by the Profibus-DP coupler: Under SyCon, change the list of
modules configured for the gateway (see chapter 4.2.6). Since we have added 4 bytes after the output data in
the gateway memory, the coupler should be configured to issue an additional 4-byte output data block for the
gateway.
In this case, add an “INPUT: 4 Byte (2 word)” module after the module configured for the gateway, as the
number of input bytes in the default configuration is even (word-aligned).
NOTE: Make sure that the total input and ouput sizes of the configured modules are the same as the exchange
sizes displayed in the “Sub-network Monitor.” In the current example, “In Area 32 bytes” and “Out Area
36 bytes” imply that the modules combined under SyCon must have a total of 16 IW and 18 OW.
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In this example, the modules
configured for the gateway are
listed on the right.
Then you should save and export the configuration of the Profibus-DP network, as described in chapter 4.2.7.
7) Configuring the Profibus-DP master PLC outputs: under PL7 PRO, import the new configuration of the
Profibus-DP network (see chapter 4.2.8). Words %QW4.0.16 and %QW4.0.17 are now displayed in the
"PROFIBUS-DP slave data” frame of the TSX PBY 100 coupler configuration window, providing that the
address 2 station is selected in the list of the “PROFIBUS-DP slave configuration” frame.
We get a correspondence derived from the one used for the gateway default configuration. The changes in
relation to the default configuration are shown by a greyed-out background, like the “free memory locations”.
Service
PLC output
Managing the downstream Modbus network
%QW4.0.00
%QW4.0.10
%QW4.0.20
%QW4.0.30
%QW4.0.40
%QW4.0.50
%QW4.0.60
%QW4.0.70
%QW4.0.80
Periodic communications
—
Controlling
TeSys U motor starters
Aperiodic communications
—
Reading the value of a
motor starter parameter (QUERY)
Aperiodic communications
—
Writing the value of a
motor starter parameter (QUERY)
Aperiodic communications
(“Trigger bytes” for the queries)
%QW4.0.90
Periodic communications
—
%QW4.0.16
Controlling motor starter TeSys U f
%QW4.0.17
%QW4.0.10
%QW4.0.11
%QW4.0.12
%QW4.0.13
%QW4.0.14
%QW4.0.15
Description
Bit 15 ................... Bit 8 Bit 7 ..................... Bit 0
Profibus-DP master command word
Value of the motor starter c command register
Value of the motor starter d command register
Value of the motor starter e command register
Free memory location
Value of the motor starter g command register
Value of the motor starter h command register
Value of the motor starter i command register
Value of the motor starter j command register
Slave number
Function number
(0x01-0x08)
(0x03)
Address of the parameter to be read (0xxxxx)
Number of parameters to be read (0x0001)
Slave number
Function number
(0x01-0x08)
(0x06)
Address of the parameter to be written (0xxxxx)
Value of the parameter to be written (0xxxxx)
Read parameter
Write parameter
query counter
query counter
Value of the
“Command Register”
Value of the
“2nd Command Register”
8) Transferring the Profibus-DP coupler configuration: Once changes have been made to the Profibus-DP
coupler configuration, it is necessary to validate the hardware configuration of the PLC rack, and to transfer
the whole application to the Premium PLC on which the coupler is located. Please see chapter 4.2.12.
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6. Configuring the Gateway
6.10. Deleting Aperiodic Parameter Data
If your PLC application does not need the aperiodic service for reading/writing parameter data on Modbus
slaves, you can delete the associated commands. If you also intend to add Modbus data, and therefore use new
locations in the gateway’s memory, it is preferable to delete the aperiodic commands from the start, so that you
can reuse the memory locations.
On the other hand, if the only configuration operation you wish to carry out on the LUFP7 gateway consists of
not using the aperiodic service for parameter data, you can simply not use this service. Go straight on to step 8.
If you decide to delete the aperiodic commands, you will need to carry out the following operations:
1) Displaying parameter data commands: Select the very first node of the downstream Modbus network,
“TeSys U n°1”, and expand the tree structure showing its commands and transactions. The screen should
look like the one below.
2) Deleting the read command for a parameter: Select the personalized “Transactions 1” command and delete it
with the “Del” key (or “Delete” from the menu whose name corresponds to the name of the selected node).
A request for confirmation appears, asking you whether or not to proceed deleting the “Transactions 1”
command. In this case confirm with the “Yes” button.
3) Deleting the write command for a parameter: Back in the main ABC-LUFP Config Tool window, the
“Transactions 1” command has been deleted. The second personalised command, “Transactions 2” is
automatically renamed “Transactions 1”, but retains all of its setup. Now delete this one in the same way as
you did with the previous command.
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4) Checking the new memory occupation: If you wish to check how much of the gateway’s memory is now
occupied, select “Sub-Network” and choose “Monitor” from the “Sub-Network” menu. The following window
appears, allowing you to see how much of the gateway’s memory is occupied by Modbus data. The part
framed in red represents the memory occupation before the deletion of the two setup commands. It has been
inlaid in the illustration below so that you can see the effects of the deletion operations we have just carried
out.
You will note that the “TeSys U n°1” section now only has the two Modbus commands common to the eight
TeSys U motor starters, and that the memory locations which corresponded to the two personalised
commands are now free.
NOTE: The free memory location at address 0x0012 in the gateway’s memory is no longer part of the
gateway’s inputs, because there is no input data used beyond this address.
5) Transferring this configuration to the gateway: Please see chapter Erreur ! Source du renvoi introuvable..
Check that the configuration is valid (LED s GATEWAY flashing green).
6) Saving this configuration to your PC’s hard disk.
7) Changing the amount of data received and the number of data transmitted by the Profibus-DP coupler: Still in
SyCon, change the list of modules configured for the gateway (see chapter 4.2.6). Since now you only have
18 input data bytes and 18 output data bytes in the gateway memory, the coupler should be configured to
receive an 18-byte input data block from the gateway and to transfer an 18-byte output data block to the
gateway.
Then you should save and export the configuration of the Profibus-DP network, as described in chapter 4.2.7.
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6. Configuring the Gateway
8) Configuring the inputs and outputs of the Profibus-DP master PLC: under PL7 PRO, import the new
configuration of the Profibus-DP network (see chapter 4.2.8 and following chapters). Only words %IW4.0 to
%IW4.0.8 and %QW4.0 to %QW4.0.8 are now displayed in the "PROFIBUS-DP slave data” frame of the
TSX PBY 100 coupler configuration window, providing that the address 2 station is selected in the list of the
“PROFIBUS-DP slave configuration” frame.
We get the two correspondences represented below, derived from the ones used for the gateway default
configuration.
Service
PLC input
Description
Bit 15 ....................Bit 8 Bit 7 ...................... Bit 0
Managing the downstream
Modbus network
%IW4.0.00
Gateway status word
Periodic communications
—
Monitoring of
TeSys U motor starters
%IW4.0.10
%IW4.0.20
%IW4.0.30
%IW4.0.40
%IW4.0.50
%IW4.0.60
%IW4.0.70
%IW4.0.80
Value of the motor starter c status register
Value of the motor starter d status register
Value of the motor starter e status register
Value of the motor starter f status register
Value of the motor starter g status register
Value of the motor starter h status register
Value of the motor starter i status register
Value of the motor starter j status register
Service
PLC output
Description
Bit 15 ....................Bit 8 Bit 7 ...................... Bit 0
Managing the downstream
Modbus network
%QW4.0.00
Profibus-DP master command word
Periodic communications
—
Controlling
TeSys U motor starters
%QW4.0.10
%QW4.0.20
%QW4.0.30
%QW4.0.40
%QW4.0.50
%QW4.0.60
%QW4.0.70
%QW4.0.80
Value of the motor starter c command register
Value of the motor starter d command register
Value of the motor starter e command register
Value of the motor starter f command register
Value of the motor starter g command register
Value of the motor starter h command register
Value of the motor starter i command register
Value of the motor starter j command register
9) Transferring the Profibus-DP coupler configuration: Once changes have been made to the Profibus-DP
coupler configuration, it is necessary to validate the hardware configuration of the PLC rack, and to transfer
the whole application to the Premium PLC on which the coupler is located. Please see chapter 4.2.12.
6.11. Changing a Modbus Slave Configuration
Configuring a Modbus slave itself remains very simple because it only involves the name and the Modbus
address of the node to which it corresponds. On the contrary, configuring Modbus commands is much more
complete and is the subject of a separate object of its own (see chapter 6.12).
You will need to change the configuration of a Modbus slave when you add a new Modbus unit (see
chapter 6.8), using any method.
Changing the name of the node which corresponds to a Modbus slave is used to distinguish it from the other
nodes when the configuration of its Modbus commands has been changed, for instance.
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6.11.1. Changing the Name of a Modbus Slave
To carry out this operation, select the node which corresponds to the Modbus slave involved (“Devices:”
section), and perform one of the four following actions:
• right-click on the node and click on “Rename” in the popup menu that appears, or
• select the node and click on the node's name, or
• select the node and choose “Rename” in the menu whose name matches the node's name, or
• use the F2 function key.
After confirming the new name (“Enter” key or click outside the node's name), it will be used to update the menu
bar and the status bar of ABC-LUFP Config Tool. An example is given below. The three red frames shown in this
example show the consequences of the change made.
6.11.2. Changing the Address of a Modbus slave
To carry out this operation, select the node which corresponds to the Modbus slave involved (“Devices:”
section), click on the value of the current address (value of the “Slave address” field, in the “Configuration:”
section), then change it.
NOTE: The address of a Modbus slave must be between 1 and 247. The system will not let you add a
value > 247.
WARNING
USE OF RESERVED MODBUS ADDRESSES
Do not use Modbus addresses 65, 126, or 127 if a gateway’s Modbus slaves will include a Schneider Electric
Adjustable-Speed Drive System device such as an Altistart soft-starter or an Altivar motor drive. The Altistart
and Altivar devices reserve these addresses for other communications, and the use of these addresses in
such a system can have unintended consequences.
Failure to follow this instruction can result in death, serious injury, or equipment damage.
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6. Configuring the Gateway
After confirming the new address (“Enter” key or click outside the data entry field of the address of the Modbus
slave), this will become effective in ABC-LUFP Config Tool, and the values of the “Slave Address” elements of
the queries and responses in the Modbus commands for the selected node will be automatically updated. An
example is given below, but the updating of a single “Slave Address” element is shown:
6.11.3. Changing the Name of a Modbus Command or Transaction
To rename a Modbus Command or Transaction, first perform one of the following actions:
• right-click on the name of the command itself (e.g. Preset Multiple Regs) and click on “Rename” in the popup
menu that appears, or
• select the name of the command and choose “Rename” in its corresponding menu, or
• select the name of the command and click inside its name, or
• select the name of the command and press the F2 key.
Then, type the new name of the command, and confirm it (“Enter” key or click outside the name’s field) or
cancel it (“Escape” key). Once confirmed, the new name will become effective in ABC-LUFP Config Tool.
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6. Configuring the Gateway
For Modbus commands, but not Transactions, the type of command is automatically appended at the end of its
new name.
An example is given below:
This renaming function can also be used for the
Queries and Responses of the Modbus
Commands and Transactions, as illustrated by the
following example:
6.12. Adding and Setting Up a Modbus Command
6.12.1. With the TeSys U Motor Starters
With TeSys U motor starters, the main use of adding a Modbus command allows you to control or monitor
additional registers, without having to change the elements in the default configuration. So, the operation of the
periodic and aperiodic communication services remains the same as for the default configuration, unlike the
operations described in the various parts of chapter 6.9.
Instead of adding a command and fully configuring it, it is a better idea to copy one of the two default commands
for TeSys U motor starters, “Read Holding Registers” (reading/monitoring) or “Preset Multiple Registers”
(writing/controlling), and to paste it into the list of Modbus commands for the appropriate node.
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6. Configuring the Gateway
To copy an already configured Modbus command, select it, then choose “Copy” from the menu whose name
corresponds to the name of the selected command. Keyboard shortcut: “Ctrl C”. Then continue using one of
the two methods shown below:
a) Select the node corresponding to the Modbus slave for which you wish to add this command (e.g. “TeSys U
n°4”), then choose “Paste” from the menu whose name corresponds to the selected node. A new command is
added after all the other configured commands for this node. The whole of its configuration is identical to that
for the previously copied command. Keyboard shortcut: “Ctrl V”.
b) Select one of the commands for the node involved, then choose “Insert” from the menu whose name
corresponds to the selected command. A new command is added just before the one which is selected. The
whole of its configuration is identical to that for the previously copied command.
As the new Modbus command and the original Modbus command are identical, you will need to make changes
to the fields highlighted in blue in one of the two diagrams below, depending on whether this is the “Preset
Multiple Regs” command or a “Read Holding Registers” command (see chapter 6.9). The correspondence
between the various elements which appear in these tree structures and the standard Modbus terminology is
located to their right:
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6. Configuring the Gateway
Name of the Modbus command
Modbus query
! Frame "
Slave no.
Function no.
No. of the 1st word (MSB / LSB)
Number of words (MSB / LSB)
Number of bytes
…Values of the words (MSB/LSB)…
CRC16 (LSB / MSB)
Modbus response
Slave no.
Function no.
No. of the 1st word (MSB / LSB)
Number of words (MSB / LSB)
CRC16 (LSB / MSB)
Name of the Modbus command
Modbus query
! Frame "
Slave no.
Function no.
No. of the 1st word (MSB / LSB)
Number of words (MSB / LSB)
CRC16 (LSB / MSB)
Modbus response
! Frame "
Slave no.
Function no.
Number of bytes read
…Values of the words (MSB/LSB)…
CRC16 (LSB / MSB)
NOTE: In all cases, the “Query / Slave Address” and “Response / Slave Address” elements are automatically
updated by ABC-LUFP Config Tool according to the node in which the command is located. Their values cannot
be changed by the user. In the same way, the “Query / Function code” and “Response / Function code” fields
depend on the nature of the Modbus command and cannot be changed by the user.
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The operations to be carried out are similar to changing the default commands. For the “Read Holding Registers”
command, please see chapter 6.9.1, and chapter 6.9.3. For the “Preset Multiple Regs” command, please see
chapter 6.9.2, and chapter 6.9.4.
6.12.2. With a Generic Modbus Slave
In this chapter, we will add and configure Modbus commands differing from the LUFP7 defaults.
Please see Appendix F: Modbus Commands, for a list of the Modbus functions supported by the LUFP7
gateway. If you need to use a command which is not supported by the gateway, you can configure one. A
command of this sort is included in a specific element called “Transactions” or becomes a new Modbus
command in its own right. Please see the next paragraph for further details on this subject.
For our example, we will use an Altistart starter, the ATS48, and a Modbus command recognized both by the
gateway and the ATS48. This is the “Preset Single Register” command, whose function code is 6 and which
allows you to write the value of a unique output word. This function will be used to periodically write the value of
the ATS48’s CMD command register, located at address W400 (address 400 = 0x0190).
Since the gateway’s default configuration already has 8 Modbus slaves, you will need to delete one of them,
such as the “TeSys U n°2” node, for example, and to add a new node in its place (see chapter 6.7 and chapter
6.8.
NOTE: We strongly advise you not to delete the “TeSys U n°1” node, as it contains the commands
corresponding to the read and write services for a parameter in a Modbus slave.
After creating the new node, we
rename it and assign it Modbus
address 10, as shown at right:
We then add the “Preset Single
Register”
command
by
choosing “Add Command” from
the “ATS48” menu.
In the window which appears (shown opposite), select the “0x06 Preset
Single Register” command and choose “Select” from the “File” menu.
Back in the main ABC-LUFP Config Tool window, the “Preset Single
Register” command now appears in the list of Modbus commands for the
“ATS48” node.
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Expand the full tree structure for this command, shown below. The correspondence between the various
elements which appear in this tree structure and the standard Modbus terminology is located to its right.
Name of the Modbus slave
Name of the Modbus command
Modbus query
! Frame "
Slave no.
Function no.
Word no. (MSB / LSB)
Value of the word (MSB / LSB)
CRC16 (LSB / MSB)
Modbus response
! Frame "
Slave no.
Function no.
Word no. (MSB / LSB)
Value of the word (MSB / LSB)
CRC16 (LSB / MSB)
These elements can be configured using ABC-LUFP Config Tool, as described in the following chapters.
6.12.2.1. Managing Degraded Modes
PLC processor stopped or on failure
PLC processor response
Outputs:
Software error: outputs reset to default state or hold their present state depending on configuration.
Hardware error: (EEPROM or hardware failure), output state will be indetermined
Inputs: PLC stops responding to inputs in any error state.
Profibus master response
Depending on master configuration:
forces Profibus outputs to 0 and refreshes the inputs,
or holds Profibus outputs in their last position, and refreshes the inputs.
LUFP7 gateway response
If the master forces Profibus outputs to 0 and refreshes the inputs:
all data sent (Write requests) is set to 0,
reading from slaves continues to run normally.
If the master holds Profibus outputs and refreshes the inputs:
all data sent (Write requests) retains its current value,
reading from slaves continues to run normally.
Slave response
Depending of the slave.
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6. Configuring the Gateway
Profibus master stopped or on failure
PLC processor response
The PLC processor provides some error and/or diagnostic objects to the application in case of Profibus
master stop or failure (input/output not valid).
Refer to the PLC user manual to have their description.
This information must be managed in the PLC application.
Profibus master response
If the Profibus master is stopped (command coming from the application):
the master stops to communicate with the LUFP7 gateway.
If the Profibus master is on failure:
the master stops to communicate with the processor and the LUFP7 gateway.
LUFP7 gateway response
If the master stops to communicate with the gateway, the behavior depends on the fieldbus "Offline options:
Clear:
All data sent to the concerned Modbus slave is set to 0.
Freeze:
All data sent retains its current value.
No scanning: The query is no longer transmitted.
Slave response
Depending on the slave.
LUFP7 gateways disconnected on Profibus side
PLC response
The PLC processor provides some error and diagnostic objects coming from the Profibus master in case of
a slave disconnection from the application.
Refer to the PLC user manual to have their description.
This information must be managed in the PLC application.
Profibus master response
The Profibus master provides the processor with some error and diagnostic objects in case of Profibus
slave disconnection.
LUFP7 gateway response
The behavior depends on the fieldbus Offline options:
Clear:
All data sent to the concerned Modbus slave is set to 0.
Freeze:
All data sent retains its current value.
No scanning: The query is no longer transmitted.
Slave response
Depending of the slave
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LUFP7 gateways failure
PLC response
The PLC processor provides some error and diagnostic objects coming from the Profibus master in case of
slave failure to the application.
Refer to the PLC user manual to have their description.
This information must be managed in the PLC application.
Profibus master response
The Profibus master provides the processor with some error and diagnostic objects in case of Profibus
slave failure.
LUFP7 gateway response
In case of a failure, the gateway stops to communicate with the Profibus master and the Modbus slaves.
Slave response
Depending on the slave.
LUFP7 gateways disconnected on Modbus side or slave failure
PLC response
The processor gives access to the gateway status word coming from the Profibus master input table and to
the gateway command word coming from the output table.
These 2 words must be managed in the PLC application in order to detect if a Modbus slave is missing.
Profibus master response
The Profibus master must be configured to access the gateway status and command words in order to
provide Modbus diagnostic information.
LUFP7 gateway response
The behavior depends on the different options:
Timeout time, number of Retries, Reconnect time and Offline option for sub-network.
Slave response
In case of a Modbus disconnection, the behavior depends on the slave.
In case of a slave failure, undetermined state which must be managed in the PLC application.
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6. Configuring the Gateway
6.12.2.2. Configuring the Query
Select the “Query” element from the Modbus command. The
various elements of the configuration of the query for this command
are shown opposite. The values displayed correspond to the
default values for any new command.
These elements allow you to configure how the whole command is
managed, including how degraded modes are managed (number of
re-transmissions, for example).
Each of these elements is described, in order, in the table below. When a unit is assigned to an element, it is
shown in brackets after the name of the element.
Configuration
element
Offline options
for fieldbus
Reconnect time
(10ms)
Default value:
10ms x 1000 =
10s
Retries
Default value: 3
Timeout time
(10ms)
Default value:
10ms x 100 = 1s
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Description
This element affects the data sent to the Modbus slave, but only in the query to which this
element belongs to, whenever the gateway is disconnected from the Profibus-DP network.
This element takes one of the following three values:
- Clear ............. From now on all data sent to the Modbus slave using this query is set to
0x0000 (resetting of the output data in the gateway’s memory).
- Freeze........... All data sent to the Modbus slave using this query retains its current values
(the output data in the gateway’s memory is frozen).
- NoScanning .. The query is no more transmitted to the Modbus slave by the gateway
If there is no response from the Modbus slave to a query, or following the receipt of an
incorrect response, the gateway uses the “Retries” and “Timeout time (10ms)” elements to
carry out re-transmissions. If the Modbus slave has still not responded correctly following
these re-transmissions, the gateway stop sending it the corresponding query for a period of
time which can be adjusted using “Reconnect time (10ms)”.
When this period is over, the gateway attempts to restore communication with the Modbus
slave.
This element indicates the number of re-transmissions carried out by the gateway if there is
no response from the Modbus slave to a query, or if the response is incorrect. This retransmission process ceases as soon as the gateway gets a correct response within a given
time. If none of the re-transmissions has allowed the gateway to obtain a correct response,
the Modbus slave is deemed to be off-line, but only in relation to the command in question.
The gateway then uses the “Offline options for sub-network” and “Reconnect time (10ms)”
elements and the LED r MODBUS becomes red. This LED will only revert to a green state if
the Modbus command is answered with a correct response, once the reconnection has
started (see element “Reconnect time (10ms)”).
If the number of re-transmissions is set to 0, the process described above will not be run.
This element represents the time that the Modbus slave will wait for a response. If a
response has not reached the gateway within the given time, configured using the “timeout
time (10ms)” element, the gateway proceeds to a re-transmission. This process continues
until it reaches the last re-transmission allowed (see “Retries”), then the gateway declares
the Modbus slave off-line, but only for the command to which the “timeout time (10ms)”
belongs to.
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Configuration
element
Trigger byte
address
Description
This element is only used by the gateway if “Update mode” is set to “Change of state on
trigger”. In this case, it specifies the address, in the gateway’s output memory (0x0202 to
0x02F3), of an 8-bit counter managed by the Profibus-DP master.
When the value located at this address is changed by the Profibus-DP master but different
from zero, the query configured with a “Change of state on trigger” related to this address is
transmitted to the Modbus slave. So the Profibus-DP master must have access to this
counter in the same way as for the periodic output registers sent to TeSys U motor starters.
In comparison to the “On data change” mode, this mode allows you to send a command on
a specific order from the Profibus-DP master if, for example, the latter is unable to update
all data from of any given query at the same time.
NOTE: In the specific case of the gateway’s default configuration, the “Transactions 1” and
“Transactions 2” personalized command mode for the “TeSys U n°1” node is set to “Change
of state on trigger”. These aperiodic commands are respectively used to read and write the
value of a parameter of one of the Modbus slaves.
The “Trigger byte address” elements of the “Query” elements of these two commands are
configured at addresses 0x021E and 0x021F. These are the “parameter read/write request
counters”. Considered under Profibus-DP, SyCon, and PL7 PRO, these two data are
configured the same way as the other outputs (see chapter 4.2.9) and both correspond to
the %QW4.0.15 output.
To transmit one of these two commands, the Profibus-DP master PLC must first of all
update all of the data to be transmitted on the Modbus network for this command
(addresses 0x0212 to 0x0217 or addresses 0x0218 to 0x021D), then change the value of
the associated counter (address 0x021E or 0x021F). The gateway will then transmit the
query corresponding to the command.
Update mode
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NOTE: The “trigger byte” does not have to be an item of output data updated by the
Profibus-DP master. In fact it is quite possible that it may be an input between 0x0002 and
0x00F3. In this case, the Modbus slave which updates this byte will condition the
exchanges of the command you’re currently configuring.
This element is used to specify the transmission mode for the query on the Modbus
network. It takes one of the following four values:
- Cyclically................................. Default communication mode. The query is transmitted
periodically on the Modbus network (see “Update time”).
- On data change ...................... The gateway transmits the query on the Modbus network
when at least one item of data from this query is changed by the Profibus-DP master.
So this is an aperiodic communication mode. For instance, this is not the case with
the queries associated with “Transactions 1” and “Transactions 2” personalized
commands for the “TeSys U n°1” node of the gateway’s default configuration. These
queries are transmitted when at least one of the values of their output data
(addresses 0x0212 to 0x0217 or addresses 0x0218 to 0x0220D) is changed by the
Profibus-DP master. So all data from a single query must be updated by the ProfibusDP master at the same time. If you are not certain whether your software is able to
update all the output data from a query at the same time, we recommend using
“Change of State on trigger” mode for these two commands.
- Single Shot ............................. This transmission mode only allows a single Modbus
exchange for the whole of the time that the gateway is operating. This exchange
takes place just after the initialization of the gateway.
- Change of state on trigger...... With this aperiodic communication mode, the Modbus
query is sent every time that the Profibus-DP master changes the value of an 8-bit
counter designated by the “Trigger byte address” element. Please see the description
of this element for further information about how to use this communication mode.
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6. Configuring the Gateway
Configuration
element
Update time
(10ms)
Description
This element is only used by the gateway if “Update mode” is set to “Cyclically”. In this
case, it specifies the query’s transmission period on the Modbus network.
Default value:
10ms x 100 = 1s
Returning to our example employing the ATS48 at address 10, we
will use the configuration shown opposite. The most notable points
of this configuration are:
• On disconnection the data is reset on one of the two networks.
• 3 re-transmissions with a 100 ms timeout.
• Periodic communications with a cycle time set to 300 ms.
6.12.2.3. Configuring the Response
Next select the “Response” element from the Modbus command.
The various elements of the configuration of the response for this
command are shown opposite. The values displayed correspond to
the default values for any new command.
These elements allow you to configure a single aspect of managing the command, described below. Each of
them is described, in order, in the table below.
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Configuration
element
Offline options
for sub-network
Trigger byte
Description
This element affects the input data sent to the Profibus-DP master, but only for the data
of the Response to which this element belongs to, whenever the Modbus slave does not
answer to the corresponding Query (or upon disconnection from the Modbus sub-network).
This element takes one of the following two values:
- Clear
All data sent to the Profibus-DP master for this Response is set to 0x0000
(resetting of the input data in the gateway’s memory).
- Freeze
All data sent to the Profibus-DP master for this Response retain their current
values (the input data in the gateway’s memory is frozen).
This element is used by the gateway to activate the unitary incrementation of an 8-bit
counter in order to notify the Profibus-DP master of the receipt of a new response to the
associated Modbus command. It takes one of the following two values:
- Disabled.................................. Default configuration. The gateway does not increment any
counter on receipt of the Modbus response.
- Enabled .................................. Each time that the gateway receives a new response to the
associated Modbus command, it increments the value of an 8-bit counter designated by
the “Trigger byte address” element (see below). If used, this counter allows the ProfibusDP master, for example, to only consider the response’s corresponding data when this
counter’s value is incremented.
Trigger byte
address
This element is only used by the gateway if the element “Trigger byte” is set to “Enabled”. In
this case, it specifies the address, in the gateway’s input memory (0x0002 to 0x00F3), of an
8-bit counter managed by the gateway.
When the gateway receives a response to the associated Modbus command, it increments
the value of this counter in a unitary manner (value = value+1). So the Profibus-DP master
must have access to this counter in the same way as for the periodic input registers from
the TeSys U motor starters.
This mode allows the Profibus-DP master to be informed that a new response is available.
This can be useful, for example, if it is possible that the data from two consecutive
responses may be identical.
NOTE: In the specific case of the gateway’s default configuration, the “Trigger byte” element for
responses to the “Transactions 1” and “Transactions 2” personalized commands of the
“TeSys U n°1” node is set to “Enabled”. Hence, the management of responses to read and
write commands for parameters is event driven.
The “Trigger byte address” elements of the “Response” elements of these two commands
are configured at addresses 0x001E and 0x001F. These are the “parameter read/write
response counters”. Considered under Profibus-DP, SyCon, and PL7 PRO, these two data
are configured the same way as the other inputs (see chapter 4.2.9) and both correspond to
the %IW4.0.15 input.
The Profibus-DP master PLC will be able to detect the receipt of a response from a Modbus
slave by comparing the previous value and the current value of the associated counter
(address 0x001E or 0x001F). If there is a unitary incrementation of this counter, the PLC
may, for example, read all of the data from the response (addresses 0x0013 to 0x0017 or
addresses 0x0018 to 0x001D) and allow the transmission of a new query for reading or
writing the value of a parameter (using a “Trigger byte” for the queries). Contrarily to the
counter one can associate to the queries of any command, a response’s “Trigger byte” is a
true modulo 256 counter, i.e. zero must be managed (… 254, 255, 0, 1, 2 …).
In this example using the ATS48, we do not want the response to be event driven. So we will be retaining the
default configuration.
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6.12.2.4. Configuring the Content of the Query Frame
The window shown below is obtained using “Edit Transaction” from the “Query” menu. Unlike the tree structure in
the main ABC-LUFP Config Tool window, this display has the advantage of showing all of the frame’s fields at the
same time as well as their values. The values displayed below correspond to the values assigned by default to the
Modbus command query we have created. The correspondence with the content of the corresponding Modbus
frame has been added underneath this window.
Slave no.
Function no.
Word number
Value of the word (MSB / LSB)
(MSB / LSB)
CRC16 (LSB / MSB)
Edit the values which are not greyed out, one after another. There is a description of them below.
The nature of a frame’s fields depends on the Modbus command to which it corresponds. However, a certain
number of these fields are common to all frames, whereas others are common to a number of them. The
description of those shown above is given below, as a part of the example described at the beginning of
chapter 6.12.2.
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Field in the
frame
Slave
Address
Size in the
frame
1 byte
Description
This field cannot be changed by the user and its value is greyed out to inform
him of the fact. ABC-LUFP Config Tool updates the value of this field
automatically using the address of the Modbus slave corresponding to the
current node.
NOTE: This field is common to queries for all Modbus commands.
E.g.: The value of this field is set to the address of the Modbus slave which
corresponds to the “ATS48” node, that is to say to 0x0A.
Function
Code
1 byte
This field cannot be changed by the user and its value is greyed out to inform
him of the fact. ABC-LUFP Config Tool updates the value of this field
automatically using the function code for the corresponding Modbus command.
NOTE: This field is common to queries for all Modbus commands.
E.g.: The value of this field is set to the code for the “Preset Single Register”
command (writing the value of an output word), that is to say 0x06.
Register
Address
2 bytes
Address of an output word, or of a register, in the Modbus slave’s memory. So this
field designates the memory object to which the command relates.
NOTE: This field is common to queries for all Modbus commands whose
purpose is to access one or more locations in the memory of a Modbus slave.
When accessing several memory locations, the “Register” field designates the
address of the first word affected by the command.
E.g.: The value of this field should be changed by entering the address of the
CMD command register, that is to say 400 (0x0190). This value will be
automatically converted to hexadecimal if the user enters it in decimal.
Preset Data
2 bytes
or more for a
block of data
Data Location: Address, in the gateway’s output data memory (0x0202 to
0x02F3), of the item of data to be transmitted in the “Preset Data” field for the
query’s frame.
NOTE: The “Data location” field is used for each frame that allows you to
exchange some data between the Modbus slaves and the Profibus-DP master.
In this case it designates the starting address of the block of data to be
transmitted.
WARNING
RISK OF UNINTENDED EQUIPMENT OPERATION
The user must use even values for the “Data Location” field (i.e. 514, 516, 518, etc.). The selection of odd data
locations complicates application programming and increases the likelihood of improper Modbus values being
written to or read from the slave devices. Depending on the user’s configuration, unintended equipment
operation may result.
Failure to follow this instruction can result in death, serious injury, or equipment damage.
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6. Configuring the Gateway
Preset Data
(continued)
Returning to our previous example, the value to be assigned to the ATS48’s
CMD register should be placed in the gateway’s output data memory area. We
will be using the first free location starting at an even address, that is to say the
one located at 0x0220, with the gateway’s default configuration.
Data length: Length of the block of output data, in the gateway’s memory,
whose values must be transmitted in the “Preset Data” field of the query’s
frame. It is expressed in number of bytes.
NOTE: The “Data length” field is always used together with the “Data location”
field, described above.
E.g.: Since the “Preset Single Register” command is used to write the value of a
single register (16-bit), the value of the “Data length” field must be set to 2.
See the documentation for each Modbus slave to find out the maximum
amount of 8-bit data which can be placed in “Data” type fields in queries and
responses for this slave. With the ATS48, for instance, it is limited to 30 16-bit
words (Data length field limited to ≤ 60).
Field in the
frame
Preset Data
(continued)
Size in the
frame
Description
Byte swap: Specifies whether the output data bytes to be transmitted to the
Modbus slave must be swapped before being placed in the Modbus frame or
not. The three possible values are as follows:
- No swapping .......Default configuration. The data is sent in the same order as
they appear in the gateway’s memory. This is the case which must be used
by default, because for an item of 16-bit data, the most significant byte is
placed first in the Modbus frame and is always written into the gateway’s
memory by a Profibus-DP master with the most significant byte first.
- Swap 2 bytes.......The bytes to be transmitted are swapped two by two.
- Swap 4 bytes.......The bytes to be transmitted are swapped four by four. This is
rarely used, as it only relates to 32-bit data. The principle is similar to that of the
previous case, “Swap 2 bytes”.
Checksum
2 bytes
E.g.: We will be using the “No swapping” value, because the two bytes of the
value to be written into the ATS48’s CMD register, as transmitted by the
TSX PBY 100 coupler, are placed into the gateway’s memory in most
significant / least significant order.
Error check type: Type of error check for the frame.
- CRC.....................Default method.
This is the method adopted for the Modbus RTU protocol. It cannot be changed.
Error check start byte: Indicates the number of the byte, in the frame, from
which the calculation of the “checksum” should begin. The first byte in each
frame carries the number 0.
NOTE: The calculation of a frame’s checksum should always begin with the
first byte. Do not change the error check start byte from its default of zero. A
non-zero value will result in an incorrect CRC, and all Modbus communications
wil return an error.
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6.12.2.5. Configuring the Content of the Response Frame
The window shown below is obtained using “Edit Transaction” from the “Response” menu. The values shown in
it correspond to the values assigned by default to the Modbus command response we have created. The
correspondence with the content of the corresponding Modbus frame has been added underneath this window.
Slave no.
Function no.
Word number
Value of the word (MSB / LSB)
(MSB / LSB)
CRC16 (LSB / MSB)
Edit the values which are not greyed out, one after another.
There is a description of them below, but also see the previous chapter, as the nature of the content of response
frames is very similar to that of the fields in Modbus query frames.
NOTE: If the value of a field from the response of a Modbus slave is different from that configured via ABC-LUFP
Config Tool, the response will be rejected by the gateway. It will then proceed to a re-transmission of the query,
provided that at least one re-transmission has been configured for this command (see chapter 6.12.2.2).
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6. Configuring the Gateway
Field in the
frame
Slave Address
Function
Code
Register
Address
Preset Data
Size in the
frame
1 byte
1 byte
2 bytes
2 bytes
or more for a
block of data
Description
Identical to that of the query’s “Slave Address” field.
Identical to that of the query’s “Function” field.
Identical to that of the query’s “Register” field, since the Modbus response of
any “Preset Single Register” command is an echo to the corresponding query.
Here you should also enter the address of the memory object to which the
command relates.
If receiving an exception code, see (*).
Data Location: Address, in the gateway’s input data memory (0x0002 to
0x00F3), of the item of data received in the “Preset Data” field for the
response’s frame.
NOTE Check that the data is located at even addresses in order to align the
Modbus data (in 16-bit format) on the %IW4.0.x inputs of the Profibus-DP coupler.
E.g.: The value sent back as an echo to the command must be placed in the
gateway’s input data memory area. We shall use the first two free bytes following
the input data of the default configuration, i.e. addresses 0x0020-0x0021.
If receiving an exception code, see (*).
WARNING
RISK OF UNINTENDED EQUIPMENT OPERATION
The user must use even values for the “Data Location” field (i.e. 2, 4, 6, etc.). The selection of odd data
locations complicates application programming and increases the likelihood of improper Modbus values being
written to or read from the slave devices. Depending on the user’s configuration, unintended equipment
operation may result.
Failure to follow this instruction can result in death, serious injury, or equipment damage.
Data length: Length of the block of input data received in the “Preset Data”
field of the response frame. It is expressed in number of bytes.
E.g.: The value of the “Data length” field must be set to 2.
Byte swap: Identical to that of the query’s “Byte swap” field.
E.g.: We will also be using the “No swapping” value, for the same reasons as
with the query.
Checksum
2 bytes
Error check type: Identical to that of the query’s “Error check type” field.
Error check start byte: Identical to that of the query’s “Error check start bype” field.
NOTE: These two fields cannot be changed by the user and their values are
greyed out to reflect this. ABC-LUFP Config Tool updates the values of these
fields automatically using those of the query’s “Error check type” and “Error
check start byte” fields.
(*) If receiving an exception code, the gateway re-transmits the request according to the number of retries that has
been defined. Then, it will disconnect the slave.
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6.12.3. Adding a Special Modbus Command
Apart from the standard Modbus commands covered in the previous chapter, it is possible to create two types of
special Modbus commands: Modbus commands using the same template as standard commands and Modbus
commands whose nature and frame content can be completely changed by the user.
6.12.3.1. Modbus Commands Based on Standard Commands
You create a command of this type from the “Select Command” window (see chapter 6.12.2), by choosing “Add
Command” from the “Command” menu. The window shown below appears. It shows the structure of the future
command’s query and response frames, which will then be added to the list of available Modbus commands.
This structure includes the standard elements, that is to say the “Slave Address”, “Function” and “Checksum”
fields, described in previous chapters.
Please see chapter 2.12 Command editor in the ABC-LUFP Config Tool user manual, entitled AnyBus
Communicator – User Manual for further information about creating standard Modbus commands.
6.12.3.2. User-Customizable Modbus Commands
In ABC-LUFP Config Tool, these commands are known as “Transactions”. Unlike in the previous examples
where many of the variables were fixed by the Modbus command selected, the whole structure of the query and
response frames associated with these transactions is dictated by data in the gateway’s memory. These data
fields in the gateway’s memory may contain constant and ranged values in Byte, Word or DWord format and a
final “Checksum” field.
(See Query’s table for details)
All of the data contained in the query and response “Data” and “Variable Data” fields of a “Transactions”
command are managed by the Profibus-DP master, including the “Slave address” and “Function” fields if these
are placed in a “Data” field. For instance, this allows you to manage all of the Modbus frame fields from the
Profibus-DP master if all of the query and response fields of a “Transactions” element (excluding “Checksum”)
are “Data” type fields, or “Variable Data” type fields for data with a variable data size (e.g. the Response to a
Query used to read a variable number of registers); see chapter 6.12.3.3 for a description.
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WARNING
MORE THAN ONE “DATA” FIELD IN A MODBUS FRAME
Do not use more than one “Data” field per Modbus frame. Multiple “Data” fields in a single Modbus frame
may not be executed in the proper order by the gateway, leading to unintended consequences.
It is preferable for the master to set this data as only one “Data” field, even if this means that in-between
constants would become part of this “Data”, and thus be exchanged with the master.
Concerning “Variable Data”, there can be only one such field in any Modbus frame (Query or Response).
Thus, the “Add Variable Data” command of ABC-LUFP Config Tool will be disabled if the current frame
already includes a “Variable Data” field.
Failure to follow this instruction can result in death, serious injury, or equipment damage.
Constants in Byte, Word or DWord format place the values of these constants in Modbus query frames
(constants in “Query” elements) or by comparing them to the values located in the Modbus responses (constants
in “Response” elements). These comparisons are used to accept (identical values) or reject (different values) the
Modbus responses in the same way as for standard Modbus commands. The Profibus-DP master does not have
access to these constants. They are mainly used to replace fields such as “Slave address,” “Function,” “Starting
Address,” etc.
Please refer to the section on “Produce/Consume Menu” in chapter 5.4.2 Transaction and in chapter 5.5 Frame
objects in the ABC-LUFP Config Tool user manual, entitled AnyBus Communicator – User Manual for further
information about how to handle “Transaction” type commands.
The LUFP7 gateway’s default configuration includes two “Transaction” commands. These are aperiodic
commands used for reading and writing the value of a Modbus slave parameter (necessarily a TeSys U motor
starter with the default configuration). They are configured solely for the “TeSys U n°1” node, as the address of
the slave is controlled by the Profibus-DP master via the first byte of the “Data” field, which corresponds to the
“Slave Address” field in standard Modbus commands. This allows the Profibus-DP master to send this command
to all of the Modbus slaves, slave by slave, through the first byte of the “Data” field. The remaining fields of the
frames used by these two commands are also placed in the same “Data” field. So the Profibus-DP master has
access to all of the content of the frames in these two commands.
6.12.3.3. Using “Variable Data” Fields in Transactions
A “Variable Data” field is similar to a “Data” field, but has no predefined length. Instead, a length character (i.e. a
number of bytes) or an end character is used to indicate the significant length of the data field. Each “Variable
Data” field is also protected with a “Maximum Data Length” that prevents any overflow when there is no “end
character” where one is expected, or when the “length character” is too high.
Variable Data (w. End Character)
Data
Variable Length Data
End Character
0x00
Variable Data (w. Length Character)
0xXX
Data
0xXX bytes of Data
Length Character
The end / length character of any “Variable Data” located in the Queries of Transactions must be supplied by the
Profibus-DP master because it is the producer of this data.
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The end / length character of any “Variable Data” located in the Responses of Transactions is generally
produced by the LUFP7 gateway, not by a Modbus slave! But the Response of the Read Holding Registers
(Modbus command 0x03) is an exception to this rule, because its “Byte count” field can be used as the length
character (refer to the examples given at the end of the current chapter).
NOTE: Only one “Variable Data” field is allowed in any Query or Response of a Transaction.
The following table describes the properties of any “Variable Data” field:
Property
Byte swap
Notes
As for the standard “Data” field. As a reminder, the three possible values are as follows:
•
Data location
End Character Value
Fill un-used Bytes
No swapping: Default configuration for a Profibus-DP master. The data is sent
in the same order as it appears in the gateway’s memory.
This is the case which must be used by default.
•
Swap 2 bytes: The bytes to be transmitted are swapped two by two.
•
Swap 4 bytes: The bytes to be transmitted are swapped four by four.
For a Query: Starting address, in the gateway’s output data memory (0x0202 to
0x02F3), of the data sent by the Profibus-DP master and destined to the Modbus slave.
This data is directly inserted in the Query frame, at the position of the current “Variable
Data” field.
For a Response: Starting address, in the gateway’s input data memory (0x0002 to
0x00F3), of the data sent by the Modbus slave and destined to the Profibus-DP master.
This data is directly retrieved from the Query frame, at the position of the current
“Variable Data” field.
NOTE: In both cases, the end / length character (if actually used) is part of the data;
thus, it can also be found in the input / output data memory of the gateway.
This property is only used if “Object Delimiter” is set to “End Character” or “End
Character visible”. It is used to mark the end of the data. Of course, this specific
character must be forbidden inside the data.
Thus, for example, it is common practice to end text strings with a “zero” character
because 0x00 cannot be used in written text; this is known as the ASCIZ
representation. E.g. the string “ABC” becomes the string { 0x41 , 0x42 , 0x43 , 0x00 } in
ASCIZ.
This property is only used for “Variable Data” located in the Responses of Transactions
because the “Variable Data” located in the Queries is only updated by the master.
Only two choices are available for this property:
•
Filler Value
Maximum Data
Length
Disabled: Unused data (i.e. data located after the last character or beyond the end
character) is not updated in any way; it keeps the current value.
• Enabled: Unused data bytes are filled with the value set in “Filler Value”. For
example, if the “Filler Value” is equal to 0xFF, then all data located after the last
character or beyond the end character is set to 0xFF.
If “Fill un-used Bytes” is set to “Enabled” for the “Variable Data” of a Response, then
this value is copied into each byte located after the last character or beyond the end
character.
The combination of “Data location” and “Maximum Data length” properties
determines the input / output memory used to exchange data between the ProfibusDP master and the Modbus slave, exactly like the “Data Location” and the “Data
length” properties of the Standard “Data” fields.
NOTE: This maximum length must include the “end character” or the “length character”
if any one of these characters is used (see “Object Delimiter”, below). When used, this
character is always present in the input / output memory, even if it is not exchanged
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6. Configuring the Gateway
Object Delimiter
with the Modbus slave (i.e. if the optional “visible” item has not been chosen).
This property is critical because it dictates the method used to sort out useful data
from the whole input / output data allocated for the “Variable Data”. There are five
possibilities:
•
•
•
•
•
98
Length Character: The first byte in the input / output memory represents the
length of the significant data (length character excluded). This character is not
located in the Modbus Query or Response; it is either produced by the gateway
(based upon the length of the Modbus Response), or by the Profibus-DP master
(who alone updates the output data).
Length Character visible: Same as “Length Character”, but this character
becomes part of the Modbus Query or Response; it is either produced by the
Modbus slave (in the Response) or by the Profibus-DP master (in the Query).
End Character: The significant data ends on the first occurrence of the “End
Character Value”. This character is not located in the Modbus Query or
Response; it is either produced by the gateway (based upon the length of the
Modbus Response), or by the Profibus-DP master (who alone updates the
output data).
End Character visible: Same as “End Character”, but this character becomes
part of the Modbus Query or Response; it is either produced by the Modbus
slave (in the Response) or by the Profibus-DP master (in the Query).
No Character: This option is reserved for Responses only. With “No Character”,
upon receiving a response that contains some “Variable Data”, the gateway
simply copies the data from the frame to its input memory. Hence, the ProfibusDP master cannot determine the real length of the significant data (i.e. the data
that has been updated).
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Example 1:
Configuration of the communications between a LUFP7 gateway and only one Modbus slave (a TeSys U motor
starter located at address 1 on the Modbus sub-network, and named “TeSys U n°1”):
• The first two bytes of the input memory (0x0000-0x0001) and the first two bytes of the output memory
(0x0200-0x0201) of the gateway are reserved for the gateway initialization and diagnostics (see chapter 5),
but in the “Diagnostic and Control” mode (“Control/Status Word = Enabled but no startup lock” for the “ABCLUFP” element).
• 1 “Read Holding Registers” command (FC 0x03): Periodic command (“Update mode = Cyclically” and
“Update time (10ms) = 30” for the Query) used to get the status of the TeSys U motor starter (“Starting
register address = 0x01C7 = 455” and “Number of registers = 0x0001” in the Query; “Byte count = 0x02” in
the Response); the value of this status is transferred to addresses 0x0002-0x0003 of the input memory of
the gateway (“Data length = 0x0002” and “Data location = 0x0002” for the “Data” of the “Response”).
• 1 “Preset Multiple Regs” command (FC 0x10): Periodic command (“Update mode = Cyclically” and “Update
time (10ms) = 30” for the Query) used to set the command of the TeSys U motor starter (“Starting register
address = 0x02C0 = 704”, “Number of registers = 0x0001”, and “Byte Count = 0x02” in the Query; but also
“Starting register address = 0x02C0 = 704” and “Number of registers = 0x0001” in the Response); the value
of this command is transferred to addresses 0x0202-0x0203 of the output memory of the gateway (“Data
length = 0x0002” and “Data location = 0x0202” for the “Data” of the “Query”).
• 1 “Transactions” command: Periodic command (“Update mode = Cyclically” and “Update time (10ms) = 100”
for the Query) used to get from one to five status registers (exact number in 0x0204-0x0205) from the
TeSys U motor starter (starting at register 455 / 0x01C7); the value of these registers is transferred to
addresses 0x0006-0x000F of the input memory of the gateway (length of 2, 4, 6, 8, or 10 bytes, depending
on the number of registers actually read, for a maximum of 10 bytes). The contents of this command is
detailed below because our example focuses on it:
o The Query is made of the following fields, in this order:
ƒ 1 “Byte, Constant” field, renamed as “Address”: 0x01 (address of the Modbus slave).
ƒ 1 “Byte, Constant” field, renamed as “Function code”: 0x03 (function code of a “Read Holding
Registers” command).
ƒ 1 “Word, Constant” field, renamed as “Register Address”: 0x01C7 (to emulate the “Starting register
address” field of the FC 0x03).
ƒ 1 “Data” field, with “Data length = 0x0002” and “Data location = 0x0204” (to replace the “Number of
registers” field of the FC 0x03); the Profibus-DP master uses this output data field to set the number of
status registers (from 1 to 5) he wants to read from the TeSys U slave.
ƒ 1 “Checksum” field (mandatory: CRC at 0x0000).
o The Response is made of the following fields, in this order:
ƒ 1 “Byte, Constant” field, renamed as “Address”: 0x01 (address of the Modbus slave).
ƒ 1 “Byte, Constant” field, renamed as “Function code”: 0x03 (function code of a “Read Holding
Registers” command).
ƒ 1 “Byte, Limits” field, renamed as “Byte count”, and with “Minimum Value = 0x02” and “Maximum
Value = 0x0A” (to emulate the “Byte count” field of the FC 0x03); these limits restrict the Response for
reading from 1 to 5 registers (2 to 10 bytes).
ƒ 1 “Variable Data” field that replaces the standard “Data” field generally used for the FC 0x03; its
properties are set as follows:
• “Byte swap = No Swapping” ............. The default case for a Profibus-DP master.
• “Data location = 0x0005” .................. The data begins at 0x0005 with the “Length Character” (see
below); thus, the significant data really begins at 0x0006 (this
aligns the 16-bit data on even memory addresses).
• “End Character Value = 0x00” .......... Not used here.
• “Fill un-used Bytes = Enabled” ......... In this example, the not-up-to-date input data read from the
TeSys U slave will be set to 0xFF (the “Filler Value”).
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• “Filler Value = 0xFF” .........................The value copied into the not-updated data retrieved from the
Response frame, i.e. for data located beyond the last
character, as indicated by the “Length Character”.
• “Maximum Data length = 0x000B” ....A maximum of 11 bytes must be accepted and allocated in
the input memory (from 0x0005 to 0x000F); the first byte is
the “Length Character” and the other ten bytes are the
significant data, retrieved from the frame of the Response
sent by the Modbus slave.
• “Object Delimiter = Length Character” ...This mode states that the first input data byte (here, 0x0005)
is the length of the significant data (0x0005 excluded); it also
states that, as a not “ visible” character, this byte is not
located in the frame of the Response, but evaluated by the
gateway, depending on the real length of the Response
frame.
ƒ 1 “Checksum” field (mandatory: CRC at 0x0000).
With this configuration, the contents of the gateway memory is as follows:
Input Memory (16 bytes)
Output Memory (6 bytes)
0x0000-0x0001
Gateway: Status Word
0x0200-0x0201
Gateway: Control Word
0x0002-0x0003
TeSys U: Status Register (455)
0x0202-0x0203
TeSys U: Command Register (704)
0x0004
Spare / Not used
0x0204-0x0205
Number of registers to read (1-5)
0x0005
0x0006-0x0007
0x0008-0x0009
0x000A-0x000B
0x000C-0x000D
0x000E-0x000F
Significant Data length
1st status register (455)
2nd status register (456)
3rd status register (457)
4th status register (458)
5th status register (459)
Use your Profibus-DP configuration tool to resize the I/O data exchanged between the master (TSX PBY 100)
and the LUFP7 gateway; use an “INPUT:
16 Byte ( 8 word)” module and an “OUTPUT:
6 Byte
( 3 word)” module.
Under PL7 PRO, for a TSX PBY 100 coupler inserted into the slot #2 of a TSX Premium PLC, these I/O translate
into the following:
Inputs (8 words)
Outputs (3 words)
%IW2.0
Gateway: Status Word
%QW2.0
Gateway: Control Word
%IW2.0.1
TeSys U: Status Register (455)
%QW2.0.1
TeSys U: Command Register (704)
%IW2.0.2
Significant Data length (bits 0-7)
%QW2.0.2
Number of registers to read (1-5)
%IW2.0.3
%IW2.0.4
%IW2.0.5
%IW2.0.6
%IW2.0.7
1st status register (455)
2nd status register (456)
3rd status register (457)
4th status register (458)
5th status register (459)
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For a motor starter commanded into RUN mode (%QW2.0.1 = 0x0001), its status can be read in %IW2.0.1
(0x0043), but also from %IW2.0.3 to %IW2.0.7, depending on the number of registers actually read (%QW2.0.2
= 0x0001 to 0x0005):
Resulting
Inputs
%IW2.0.2
%IW2.0.3
%IW2.0.4
%IW2.0.5
%IW2.0.6
%IW2.0.7
————————— Value of %QW2.0.2 —————————
0x0001
0x0002
0x0003
0x0004
0x0005
0x••02
0x0043
0xFFFF
0xFFFF
0xFFFF
0xFFFF
0x••04
0x0043
0x0000
0xFFFF
0xFFFF
0xFFFF
0x••06
0x0043
0x0000
0x000D
0xFFFF
0xFFFF
0x••08
0x0043
0x0000
0x000D
0x0001
0xFFFF
0x••0A
0x0043
0x0000
0x000D
0x0001
0x0000
Please note that the gateway sets to 0xFF (the “Filler Value”) any byte located beyond the last significant byte.
Example 2:
The configuration described in Example 1 is also used here, with the two following exceptions:
• In the “Variable Data”, the “Byte, Limits”, renamed as “Byte count”, and with “Minimum Value = 0x02” and
“Maximum Value = 0x0A”; this field is removed from the Response because it is now included in the data
retrieved from the frame of the Response and copied into the input memory of the gateway (look at the
values of %IW2.0.2 / 0x0005 to get convinced of this fact)
• In the “Variable Data”, the “Object Delimiter = Length Character” becomes “Object Delimiter = Length
Character visible”; this instructs the gateway to retrieve the “length character” (1 byte) from the Response
frame of the Modbus slave instead of evaluating it with the Response frame's remaining length.
As these two modifications mutually compensate one another in the specific case of a “Read Holding
Register” command, the results described at the end of Example 1 also apply here.
6.13. Configuring the General Characteristics of the Gateway
This operation relates to the gateway’s general characteristics (“Fieldbus”
to “Sub-Network” elements), whereas the previous chapters described the
configuration of the Modbus slaves (elements located under the “SubNetwork” element).
The “Fieldbus” element describes the upstream network, that is to say the
Profibus-DP network in the case of the LUFP7 gateway.
The “ABC-LUFP” and “Sub-Network” elements describe the downstream
network, that is to say the Modbus RTU network in the case of the LUFP7
gateway, and allow you to identify the software version in the gateway.
The configuration of these three elements, plus the commands they give
access to, are described in the next three chapters.
6.13.1. “Fieldbus” Element
Below this element there is a list of the mailboxes configured by default. These elements are not described here,
as they are only designed for the internal management of the gateway. These mailboxes can neither be changed
nor deleted. Both their number and their nature depend on the type of upstream network.
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When the “Fieldbus” element is selected, you can select the
type of upstream network: “Profibus-DP” with the LUFP7
gateway.
If your PC is connected to the gateway using the PowerSuite
cable and you are using ABC-LUFP Config Tool in “on-line”
mode when ABC-LUFP Config Tool starts up, the type of
upstream network will be automatically detected.
The only command accessible from the “Fieldbus” menu is “Restore Default Mailboxes”. The usage of this
command is recommended if you inadvertently inserted a user-defined Mailbox under the “Fieldbus” device. As
Mailboxes are not meant to be used with the LUFP7 gateway, only the Default Mailboxes should be set under
the “Fieldbus” device, in the following order:
• StartInit
• Fieldbus specific
• EndInit
Should any other Mailbox also appear in this list,
please perform the “Restore Default Mailboxes”
command. Then, confirm the operation by
clicking on the “Yes” button in the confirmation /
warning window that appears.
6.13.2. “ABC LUFP” Element
The sole command accessible from the “ABC-LUFP” menu is “Disconnect” (or “Connect” if you are in “off-line”
mode); please refer to chapter 6.3, for details about “on-line” and “off-line” modes.
In the configuration of the LUFP7 gateway’s “ABC-LUFP” element, the “Physical Interface” and the “Protocol Mode”
properties must not be changed. Their value, respectively, must always be set to “Serial” and “Master Mode”.
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These seven properties allow you to configure some of the gateway’s system aspects:
•
Control/Status Word: The three possibilities offered for this property are described in chapter 5 .
•
Module Reset: By default, this property prevents the gateway from reinitializing itself when there is an
internal operation problem. Changing this option is mainly intended for “laboratory” type use.
•
Physical Interface: The only possibility offered by this property shows that the physical interface of the
downstream network of the gateway (Modbus) is a serial link.
•
Protocol Mode: This property should not be changed, because it indicates the type of protocol used on the
downstream network of the gateway. With the LUFP7 gateway, “Master Mode” must be
selected. The other possibilities available are reserved for other products from the same
family as this gateway.
•
Statistics: This property dictates the presence or absence of the two Receive and Transmit Counters in
the input memory of the gateway (see below). The four possibilities are:
• Disabled: The two “Receive Counter Location” and “Transmit Counter Location” properties are ignored.
• Enable Receive Counter: Only the “Receive Counter Location” property is used by the gateway.
• Enable Transmit Counter: Only the “Transmit Counter Location” property is used by the gateway.
• Enable Transmit/Receive Counter: Both the “Receive Counter Location” and “Transmit
Counter Location” properties are used by the gateway.
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6. Configuring the Gateway
•
Receive Counter Location: This property is only used by the gateway if “Statistics = Enable Receive
Counter” or “Statistics = Enable Transmit/Receive Counter”. It represents the
1-byte input memory address (from 0x0000 to 0x00F3) where the Modbus
Responses counter is copied into. As any other used input memory data, this
byte will increase the size of data exchanged with the Profibus-DP master.
This is a modulo 256 counter (i.e. it starts over at 0 once it goes past 255)
which is updated each time a Modbus frame is received by the gateway.
•
Transmit Counter Location: This property is only used by the gateway if “Statistics = Enable Transmit
Counter” or “Statistics = Enable Transmit/Receive Counter”. It represents the
1-byte input memory address (from 0x0000 to 0x00F3) where the Modbus
Queries counter is copied into. As any other used input memory data, this
byte will increase the size of data exchanged with the Profibus-DP master.
This is a modulo 256 counter (i.e. it starts over at 0 once it goes past 255)
which is updated each time a Modbus frame is emitted by the gateway,
retries included.
Finally, a useful command from the “Help” menu will allow you to check the software versions of the LUFP7
gateway (the “ABC-LUFP” element), but only in “on-line” mode; of course, it also shows the version of the ABCLUFP Config Tool.
To get this information, execute the “About…” command of
the “Help” menu. An example in “on-line” mode is given
here:
In “off-line” mode, all versions and information from the
“Sub-Network” and “Fieldbus” categories are replaced with
“Unknown” since they could not be obtained from an
existing and connected gateway.
The “http://www.hms.se/abc_lufp.shtml” text is an
hypertext link. By clicking on it, you are directly redirected
to the Schneider Electric's Web page dedicated to the
ABC-LUFP gateways.
This page features many downloadable items related to the
family of LUFP• gateways, including the latest version of
ABC-LUFP Config Tool.
6.13.3. “Sub-Network” Element
The five commands accessible from the “Sub-Network” menu are:
- “Paste”: Appends a copy of the last copied node (after a “Copy”
command on an existing node), or a replica of the cut node (after a “Cut”
command), to the list of nodes of the “Sub-Network” element. This
command is only available if a node has been previously copied or cut,
and only if the 8 nodes limit has not been reached yet.
- “Sub-Network Monitor”: Allows you to view the correspondence between
the data from Modbus commands and the content of the gateway’s
memory. Examples of how to use this command are shown in
chapters 6.9.3, 6.9.4 and 6.10.
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- “Add Node”: Allows you to add a new node on the downstream Modbus network. Each node corresponds to a
different Modbus slave. This command is not available if there are already 8 Modbus slaves, which is the case
with the gateway’s default configuration.
- “Add Broadcaster”: Allows you to add a broadcaster node (see chapter 6.14).
- “Load Node”: Allows you to add a pre-configured node on the downstream Modbus network. The configuration
for this node is contained in an XML file (see the section on “Importing/Exporting a Modbus slave configuration”
in chapter 6.8). This command is not available if there are already 8 Modbus slaves, which is the case with the
gateway’s default configuration.
- “Sub-Network Status…”: In “on-line” mode (see
chapter 6.13.2), this command displays a window
summarizing the values of the gateway’s error counters.
These counters are also used by the gateway to update the
value of its status word (see chapter 5.2.2). The “Update”
button allows you to refresh the values of these counters.
When you run this command in “off-line” mode, all of the
values displayed are replaced by the word “Unknown” to
show that they cannot be read on the gateway. The
“Update” button then becomes inaccessible.
NOTE: The “Sub Network Status” window may be useful to detect problems on the Modbus sub-network. So, if the
number of retransmission errors increases upon using the “Update” button, this denotes the absence of one or more
slaves, Modbus cabling or speed problems, or invalid Commands and/or Transactions. Since retransmission errors
tend to lower the general performances of the Modbus communications, you should undertake actions to prevent these
retransmission errors from increasing!
When the “Sub-Network” element is selected, you have access to all of the options allowing you to configure the
gateway’s communication protocol format on the Modbus network. The various settings you can make are
described below. All of the Modbus slaves present must support this configuration and be configured
appropriately.
- Bitrate (bits/s): The gateway
supports a limited number of
communication speeds.
Choose the speed that suits
your Modbus network.
- Data bits: 8 bits (required).
- Parity: Choose the parity
according to the format
chosen for communications
on your Modbus network.
- Physical standard:
(required).
RS485
- Stop bits: 1 or 2 bits.
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6.14. Adding a Broadcaster Node
A broadcaster node does not correspond to any Modbus slave in particular, as it applies to all Modbus slaves.
All the commands which will be configured for this node will be transmitted with the “Slave Address” field set to
0x00. This means that all of the slaves will run the command, but that none of them will respond to it.
To add a broadcaster node, select “Sub-Network”, then choose “Add
Broadcaster” from the “Sub-Network” menu. The broadcaster node created in
this way does not count in the limit on the number of configurable nodes. A
simple example is shown opposite:
The addition and configuration of a Modbus command in the list of broadcaster
node commands is done in the same way as for other nodes, but with the
following differences:
- The list of standard Modbus commands which can be used in broadcast is
smaller. Only functions 0x06 and 0x10 can be used (see list in
chapter 6.12.2).
- The command is made up of a query, but does not include any response. The query bears the name of the
command itself, instead of the name “Query.” Also, each broadcast command only consumes one of the
100 queries and responses allowed by the gateway, as there is no possible response for such a command.
- The value of the query frame’s “Slave Address” field is set to 0x00.
Please see chapter 6.12.2.2, for further details on how to configure a Modbus query.
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Appendix A: Technical Characteristics
Environment
Dimensions (excluding
connectors)
External appearance
Torque
Power supply
Protection class
Maximum relative humidity
Ambient air temperature
around the device, in a dry
environment
UL
EC
Electromagnetic compatibility
(EMC): Transmission
Electromagnetic compatibility
(EMC): Immunity
1744087 03/2009
Height: 120 mm
Width: 27 mm
Depth: 75 mm
(4.724 in.)
(1.063 in.)
(2.953 in.)
Plastic housing with snap-on connection to DIN-rail.
PSU connector: between 5 and 7 lbs.-in (0.56 and 0.79 N-m).
24V regulated ±10%
Maximum consumption: 280 mA (typically around 100 mA)
Maximum internal consumption for all of the gateway’s electronic cards,
relating to the internal 5V PSU: 450 mA
IP20
95% without condensation or seepage, according to IEC 68-2-30
According to IEC 68-2-1 Ab, IEC 68-2-2 Bb and IEC 68-2-14 Nb:
• Storage:
–55°C (±3)
to
(–72.4°F to –61.6°F) …
+85°C (±2)
(+181°F to 189°F)
• Operation:
–5°C (±3)
to
(+17.6°F to 28.4°F) …
+55°C (±2)
(+127°F to 135°F)
E 214107 certificate
“open type” category
The product should be installed in an electrical cabinet or in an equivalent location.
Certified as complying with European standards, unless otherwise stated.
Complies with the EN 50 081-2:1993 (industrial environment) standard
Tested according to class A radiation under the EN 55011:1990 standard
Complies with the EN 50 082-2:1995 and EN 61 000-6-2:1999 (industrial
environment) standard
Tested according to the ENV 50 204:1995, EN 61000-4-2:1995, EN 61000-4-3:1996,
EN 61000-4-4:1995, EN 61000-4-5:1995 and EN 61000-4-6:1996 standards.
107
Appendix A: Technical Characteristics
Communication Characteristics
“Upstream” network
“Downstream” network
Profibus-DP
characteristics
Profibus-DP
Modbus RTU
• Transmission method: PROFIBUS DIN 19245 Part 1.
• Nature of network: Device-oriented bus (DeviceBus).
• Network topology: multipoint linear topology (bus) with adapted and active line
terminations (see chapter 2.6.2).
• Physical media: single twisted pair copper cable, shielded or not, preferably a
type A Profibus-DP cable, with the following characteristics:
- Impedance....... 135 to 165 Ω
- Loop impedance .....................110 Ω/km
(nominal value ........... 150 Ω)
- Conductor diameter ................. 0.64 mm
- Capacity..............< 30 nF/km
- Conductor section ................> 0.34 mm²
• Connections: 9-point SUB-D connectors, preferably (see chapter 2.6.2).
• Communication speed: 9.6, 19.2, 45.45, 93.75, 187.5, 500, 1,500 or 12,000 kbits/s.
• Maximum network length: the length of each segment (from one line termination
to the other) is limited and depends upon the transmission rate. Using one, two,
or three repeaters makes it possible to put such segments end to end; one can
thus derive the maximum total length of the network, without changing the
maximum length of each segment.
Maximum
Max. network length
Transmission rate
segment length (with the three repeaters)
Up to 93.75 kbits/s...........................1,200 m (3,937 ft) ..........4,800 m (15,748 ft)
00,187.5 kbits/s .............................1,000 m (3,281 ft) ..........4,000 m (13,123 ft)
00,500,0 kbits/s .............................0,400 m (1,312 ft) .......... 2,000 m (6,567 ft)
01,500,0 kbits/s ............................... 200 m (656 ft) .............0,800 m (2,625 ft)
12,000,0 kbits/s ............................... ,100 m (328 ft)............. 0,400 m (1,312 ft)
Profibus-DP
characteristics
(cont'd)
• Maximum number of stations: 32 stations per segment, repeater included; up to
126 stations with all three repeaters (repeaters included). Address 126 is reserved
and should therefore not be used for exchanging data.
• Possible types of stations: there are three types of Profibus-DP stations:
- Class 1 DP master (DPM1): PLC, PC, etc. exchanging information with DP slaves.
- Class 2 DP master (DPM2): A programming, bus configurating, or commissionning
device, used to configure the Profibus-DP network upon commissioning and operation,
or supervision.
- DP slave: Peripheral device that exchanges data cyclically with the active DPM1 station
to which it is linked.
• Mono-master or multi-master network.
• Hybrid access method: Acyclical communication between masters using the
transfer of a token (synchronisation); cyclical master/slaves communications
(application data transfers).
• Up to 244 input bytes and 244 output bytes per DP slave; typical exchange of 32
bytes per slave.
• Operating modes: Functional operations (cyclical I/O exchanges), resetting to
zero (input reading and output resetting), or disruption (only inter-master
functions are allowed).
• Input (Freeze-Mode) and/or output (Sync-Mode) synchronisation of all DP
slaves.
• Other services offered:
-
Verification of DP slaves configuration.
Advanced diagnostics on three hierarchical levels.
Allocation of DP slaves addresses.
DP slaves provided with a watchdog triggering timeout.
Protection of DP slaves' access to I/O.
• Possibility to connect or disconnect
communications between other stations.
108
a
station
without
impacting
1744087 03/2009
on
Appendix A: Technical Characteristics
• Performance
results:
diagram
presenting the bus
cycle time of a monomaster Profibus-DP
network, according to
the number of DP
slaves present on
that network (with 2
input bytes and 2
output bytes per DP
slave).
Profibus-DP LUFP7
gateway specifics
•
•
•
•
•
•
1744087 03/2009
Test conditions: minimum slave time interval = 200 µs;
one bit; TSDR = 11 × duration of one bit.
Network type: PROFIBUS EN 50 170 (DIN 19245).
Protocol version: v1.10.
Standard connections: Female SUB-D 9-point
recommended for baud rates exceeding 1.5 Mbits/s.
All baud rates supported (9.6, 19.2, 93.75, 187.5, 500,
12,000 kbits/s), automatic baud rate detection.
"DP slave" Profibus-DP station.
Cyclical data transmissions: up to 244 input bytes
416 bytes exchanged maximum, inputs and outputs
maximum used to configure these I/O.
TSDI = 37 × duration of
connector,
which
is
1,500, 3,000, 6,000 and
and 244 output bytes;
included; 24 modules
109
Appendix A: Technical Characteristics
Profibus-DP LUFP7
gateway specifics
(cont'd)
Modbus RTU
characteristics
• Profibus-DP address configured using 2 coding wheels (address between 1 and
99); address 0 is not allowed.
• Profibus-DP diagnostics service: Yes (standard 6-byte diagnostic).
• "Resetting to zero" operating mode (input reading and output resetting to zero)
not supported.
• Input synchronisation (Freeze-Mode) and output synchronisation (Sync-Mode)
supported.
• Gateway address allocated by a master: Service not supported.
• Configuration conducted using a specific GSD file.
• DP-V1 extensions not supported (transmission of non-cyclical data).
• Galvanic gateway insulation from the network; D(A) and D(B) signal insulation
using opto-couplers.
• Physical media: RS485 serial link
• Network topology: Multipoint linear topology with adapted line terminations
(impedance of 120 Ω in parallel with a capacity of 1 nF)
• Communication speed: 1,200 to 57,600 kbits/s
• Data bits: 8
• Subscriber addresses: 1 to 247. Address 0 reserved for broadcasting.
Addresses 65, 126 and 127 reserved if drivers and/or starters from Schneider
Electric are used on the same Modbus network.
• Period of silence: Equivalent to the transmission of 3.5 characters.
WARNING
USE OF RESERVED MODBUS ADDRESSES
Do not use Modbus addresses 65, 126, or 127 if a gateway’s Modbus slaves will include a Schneider Electric
Adjustable-Speed Drive System device such as an Altistart soft-starter or an Altivar motor drive. The Altistart
and Altivar devices reserve these addresses for other communications, and the use of these addresses in such
a system can have unintended consequences.
Failure to follow this instruction can result in death, serious injury, or equipment damage.
Specific Modbus RTU
features of the LUFP7
gateway
110
• Maximum number of subscribers (excluding gateway): 8 Modbus slaves.
• Maximum number of commands configured: Up to 100 Modbus queries and
responses configured for the same gateway using ABC-LUFP Config Tool.
• Communication speed: 1,200, 2,400, 4,800, 9,600, or 19,200 bits/s, configured
using ABC-LUFP Config Tool.
• Period of silence: No possibility to raise the gateway’s period of silence.
• Parity: None, even or odd, configured using ABC-LUFP Config Tool.
• Start bits: 1 bit only.
• Stop bits: 1 or 2 bits, configuration using ABC-LUFP Config Tool.
1744087 03/2009
Appendix A: Technical Characteristics
Structure of the LUFP7
gateway’s memory:
Inputs
• 2 bytes for the diagnostics of errors on the downstream network by the gateway
(see chapter 5).
• 242 bytes accessible by the Profibus-DP master in the form of input data (see Appendix
C:, Input Data Memory Area paragraph, for default use of these input data).
• 268 input bytes inaccessible by the Profibus-DP master due to the maximum
number of input bytes that can be exchanged with the gateway (see
chapter 4.2.6).
Addresses
0x0000
0x0001
0x0002
:
0x00F3
0x00F4
:
0x01FF
Structure of the LUFP7
gateway’s memory:
Outputs
Inputs accessible by the Profibus-DP master
(242 bytes)
Inputs inaccessible by the Profibus-DP master
(268 bytes)
• 2 bytes for the activation or inhibition of the downstream network by the gateway
(see chapter 5).
• 242 bytes accessible by the Profibus-DP master in the form of output data (see
Appendix C: Default Configuration, Output Data Memory Area, for default use of
this output data).
• 268 output bytes inaccessible by the Profibus-DP master due to the maximum
number of output bytes that can be exchanged with the gateway (see
chapter 4.2.6).
Addresses
0x0200
0x0201
0x0202
0x02F3
0x02F4
0x03FF
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Input data area
Gateway status word
(unless “Control/Status Byte” = “Disabled”)
Output data area
Profibus-DP master command word
(except if “Control/Status Byte” = “Disabled”)
Outputs accessible by the Profibus-DP master
(242 bytes)
Outputs inaccessible by the Profibus-DP master
(268 bytes)
111
Appendix A: Technical Characteristics
Structure of the LUFP7
gateway’s memory:
General data
Data transfer order
(swapping)
• 1,024 bytes inaccessible through the Profibus-DP master.
Addresses
0x0400
0x051F
0x0520
0x063F
0x0640
:
0x07BF
0x07C0
0x07FD
0x07FE
0x07FF
General data area
Input area reserved for the Mailboxes
(288 bytes)
Output area reserved for the Mailboxes
(288 bytes)
Internal area reserved for the management
of the upstream network
(384 bytes; area not used by the LUFP7 gateway)
Internal area reserved for the control registers
(62 bytes / MSB first for 16-bit data)
Gateway status / Profibus-DP master control
(2 bytes)
NOTE: You can use the general data area for Modbus input data (from
Modbus responses) if you do not want the Profibus-DP master to have
access to them. You can also use this memory area for data transfers
between commands and/or transactions as this area is both an input and an
output area. In this case, always use 0x0400 as the starting address. If you
use multiple times the same addresses in this area, the corresponding
memory locations will be displayed in red in the “General Area” section of the
“Sub-network Monitor” window). However, this will have no consequences on
the gateway during run-time.
• Profibus-DP network: MSB first and LSB last.
• Modbus RTU network: MSB first and LSB last.
• LUFP7 gateway MSB stored in the lowest memory address.
→ In most cases, the option which should be chosen for Modbus data stored in
the gateway’s memory is “No swapping”. This option relates to all “Data”,
“Preset Data”, and “Variable Data” fields for Modbus queries and responses
frames.
112
1744087 03/2009
Appendix B: LUFP7 Gateway GSD File
The LUFP7 gateway GSD file contains all the information and settings for configuring the gateway under
Profibus-DP. This file, “Tele071F.gsd”, is used by SyCon to generate information that will eventually be used
by the DPM1 master PLC during setup phases.
Refer to chapter 4.2.4, to review the procedure for importing the GSD file under SyCon.
Identification Number
The most important information contained in the GSD file is the identification number “Ident_Number” of the
device type it designates (DP slave or DPM1 master). This identification number is, in particular, used by a
DPM1 master upon setting up its communications with a DP slave, in addition to checking its address on the
Profibus-DP network.
The allocation of Profibus-DP identification numbers is reserved for the Profibus International (PI) association. As
each identification number is unique and specific to each device type, you should change neither the number, nor
the remainder of the provided GSD file. Schneider Electric reserves the rights to change the content of this file.
Sample Profibus-DP products, with their identification numbers and the related GSD files:
Schneider Electric product
LUFP7 gateway
TEGO POWER
ATV58
ATV68
TSX PBY 100
ATV58/ATV66 gateway
Identification number
0x071F
0xBECE
0x00B9
0x1234
0x1654
0x2332
Name of the related GSD file
Tele071F.gsd
tk3110.gsd
Tele00b9.gsd
VEE_1234.gsd
Sad_1654.gsd
atvp2332.gsd
GSD File Content
;============================================================
; Profibus Device Database of :
; Schneider Electric Gateways
; Model
: LUFP7
; Description : Profibus-DP/Modbus Gateway
; Language
: English
; Date
: 14 November 2002
; Author
: Schneider Electric [EB/JFR]
;============================================================
#Profibus_DP
GSD_Revision
= 2
; Device identification
Vendor_Name
= "Schneider Electric"
Model_Name
= "LUFP7"
Revision
= "Version 1.0"
Ident_Number
= 0x071F
Protocol_Ident
= 0
; DP protocol
Station_Type
= 0
; Slave device
FMS_supp
= 0
; FMS not supported
Hardware_Release
= "Version 1.41"
Software_Release
= "Version 1.12"
1744087 03/2009
GSD file header.
LUFP7 gateway identification
Profibus-DP device.
as
a
113
Appendix B: LUFP7 Gateway GSD File
; Supported baudrates
9.6_supp
= 1
19.2_supp
= 1
45.45_supp
= 1
93.75_supp
= 1
187.5_supp
= 1
500_supp
= 1
1.5M_supp
= 1
3M_supp
= 1
6M_supp
= 1
12M_supp
= 1
; Maximum responder
MaxTsdr_9.6
MaxTsdr_19.2
MaxTsdr_45.45
MaxTsdr_93.75
MaxTsdr_187.5
MaxTsdr_500
MaxTsdr_1.5M
MaxTsdr_3M
MaxTsdr_6M
MaxTsdr_12M
Communication rates supported by the
LUFP7 gateway.
All rates should be mentioned in this
section. The gateway supports all the
baud rates of the Profibus-DP networks.
time for supported baudrates
= 60
= 60
= 60
= 60
= 60
= 100
= 150
= 250
= 450
= 800
Maximum response time of the gateway,
depending on the baud rate of the
Profibus-DP network.
The response times specified for the
gateway are standard values, compatible
with the TSX PBY 100 coupler, for
example.
; Supported hardware features
Redundancy
= 0
; not supported
Repeater_Ctrl_Sig
= 2
; TTL
24V_Pins
= 0
; not connected
Implementation_Type = "SPC3"
General hardware characteristics specific
to Profibus-DP.
; Supported DP features
Freeze_Mode_supp
= 1
Sync_Mode_supp
= 1
Auto_Baud_supp
= 1
Set_Slave_Add_supp = 0
;
;
;
;
Supported and not supported Profibus-DP
services.
; Maximum polling frequency
Min_Slave_Intervall = 1
; 100 us
supported
supported
supported
not supported
Maximum polling frequency / Minimum
polling interval
100 µs is the smallest interval that can be
configured.
; Maximum supported
Modular_Station
Max_Module
Max_Input_Len
Max_Output_Len
Max_Data_Len
Modul_Offset
sizes
= 1
= 24
= 244
= 244
= 416
= 1
Fail_Safe
= 0
Slave_Family
Max_Diag_Data_Len
= 0
= 6
Bitmap_Device = "LUFP7_R"
Bitmap_Diag
= "LUFP7_D"
Bitmap_SF
= "LUFP7_S"
; Definition of modules
114
; modular
; state CLEAR not accepted
The LUFP7 gateway is a modular
Profibus-DP device, i.e. the size of its I/O
exchanges on the Profibus-DP network is
configured by combining several modules
together (see below).
Supported and not supported Profibus-DP
services (cont'd).
The length of the gateway's diagnostic data
should remain equal to 6.
NOTE: There are no parameter data (the
“User_Prm_Data_Len” and “User_Prm_Data”
parameters are therefore omitted).
Names of the bitmap files used by SyCon
to display the gateway's connection
status.
Beginning of the section where the
modules used for configuring the sizes of
the gateway inputs and outputs are
defined.
1744087 03/2009
Appendix B: LUFP7 Gateway GSD File
Module = "IN/OUT:
1 Byte" 0x30
EndModule
;
Module = "IN/OUT:
2 Byte ( 1 word)" 0x70
EndModule
;
Module = "IN/OUT:
4 Byte ( 2 word)" 0x71
EndModule
;
Module = "IN/OUT:
6 Byte ( 3 word)" 0x72
EndModule
;
Module = "IN/OUT:
8 Byte ( 4 word)" 0x73
EndModule
;
Module = "IN/OUT: 10 Byte ( 5 word)" 0x74
EndModule
;
Module = "IN/OUT: 12 Byte ( 6 word)" 0x75
EndModule
;
Module = "IN/OUT: 14 Byte ( 7 word)" 0x76
EndModule
;
Module = "IN/OUT: 16 Byte ( 8 word)" 0x77
EndModule
;
Module = "IN/OUT: 32 Byte (16 word)" 0x7F
EndModule
;
Module = "IN/OUT: 64 Byte (32 word)" 0xC0,0x5F,0x5F
EndModule
;
Module = "IN/OUT: 128 Byte (64 word)" 0xC0,0x7F,0x7F
EndModule
;
Module = "INPUT:
1 Byte" 0x10
EndModule
;
Module = "INPUT:
2 Byte ( 1 word)" 0x50
EndModule
;
Module = "INPUT:
4 Byte ( 2 word)" 0x51
EndModule
;
Module = "INPUT:
6 Byte ( 3 word)" 0x52
EndModule
;
Module = "INPUT:
8 Byte ( 4 word)" 0x53
EndModule
;
Module = "INPUT:
10 Byte ( 5 word)" 0x54
EndModule
;
Module = "INPUT:
12 Byte ( 6 word)" 0x55
EndModule
;
Module = "INPUT:
14 Byte ( 7 word)" 0x56
EndModule
;
Module = "INPUT:
16 Byte ( 8 word)" 0x57
EndModule
;
Module = "INPUT:
32 Byte (16 word)" 0x5F
EndModule
;
Module = "INPUT:
64 Byte (32 word)" 0x40,0x5F
EndModule
;
1744087 03/2009
Definition of the “IN/OUT” (inputs size =
outputs size), “INPUT”, and “OUTPUT”
modules.
Modularity: under SyCon, one can
combine all three types of modules (I/O,
inputs, and outputs), up to the maximum
number of modules “Max_Module”, the
maximum number of input bytes
“Max_Input_Len”, the maximum number
of output bytes “Max_Output_Len”, and
the total maximum number of input and
output bytes “Max_Data_Len”. You must
not exceed any of these four limits.
Example 1: should the gateway exchange
83 input bytes and 33 output bytes, you
could combine the following modules:
• INPUT:
64 Byte ( 32 word)
16 Byte ( 8 word)
• INPUT:
2 Byte ( 1 word)
• INPUT:
1 Byte
• INPUT:
• OUTPUT: 32 Byte ( 16 word)
1 Byte
• OUTPUT:
Example 2: should the gateway exchange
33 input bytes and 34 output bytes, you
could use the following combination:
• IN/OUT: 32 Byte (16 word)
1 Byte
• INPUT:
• OUTPUT: 2 Byte ( 1 word)
115
Appendix B: LUFP7 Gateway GSD File
Module = "INPUT: 128 Byte (64 word)" 0x40,0x7F
EndModule
;
Module = "OUTPUT:
1 Byte" 0x20
EndModule
;
Module = "OUTPUT:
2 Byte ( 1 word)" 0x60
EndModule
;
Module = "OUTPUT:
4 Byte ( 2 word)" 0x61
EndModule
;
Module = "OUTPUT:
6 Byte ( 3 word)" 0x62
EndModule
;
Module = "OUTPUT:
8 Byte ( 4 word)" 0x63
EndModule
;
Module = "OUTPUT: 10 Byte ( 5 word)" 0x64
EndModule
;
Module = "OUTPUT: 12 Byte ( 6 word)" 0x65
EndModule
;
Module = "OUTPUT: 14 Byte ( 7 word)" 0x64
EndModule
;
Module = "OUTPUT: 16 Byte ( 8 word)" 0x67
EndModule
;
Module = "OUTPUT: 32 Byte (16 word)" 0x6F
EndModule
;
Module = "OUTPUT: 64 Byte (32 word)" 0x80,0x5F
EndModule
;
Module = "OUTPUT: 128 Byte (64 word)" 0x80,0x7F
EndModule
116
1744087 03/2009
Appendix C: Default Configuration
The configuration described below corresponds to the LUFP7 gateway’s default configuration.
NOTE: This chapter mainly gives the user information about the performance obtained on the downstream
Modbus network. It allows the user to decide whether, for example, he should change the period for cyclical
exchanges with one or more of the TeSys U motor starters (see chapter 6).
Configuring Modbus Exchanges
The LUFP7 gateway carries out four types of exchanges with each of the 8 TeSys U motor starters. The first two
exchanges are cyclical and allow you to control and monitor the motor starter. The last two exchanges are
aperiodic (only when there is a change in the values of the data to be transmitted to the motor starter) and allow
you to read and change the value of any motor starter parameter.
Function
0x03
0x10
Modbus function
Read Holding
Registers
Preset Multiple
Registers
Number of
bytes (1)
11,5 + 10,5
14,5 + 11,5
(0x03)
(Read Holding
Register)
011,5 + 10,5
(0x06)
(Preset Single
Register)
11,5 + 11,5
Exchange between the LUFP7 gateway
and the TeSys U motor starter
Periodic reading (300 ms period) of the TeSys U motor
starter’s status register (address 455 = 0x01C7) only
Periodic writing (300 ms period) of the TeSys U motor
starter’s status register (address 704 = 0x02C0) only
Aperiodic reading of the value of a single parameter, for a
single TeSys U motor starter at a time (function and
address supplied by the user)
Aperiodic writing of the value of a single parameter, for a
single TeSys U motor starter at a time (function and
address and value supplied by the user)
(1) Number of bytes in the Query + number of bytes in the Response, plus a period of silence of 3.5 characters
for each of these two frames. Each byte will be transmitted in the form of a group of 10 bits (8 data bits,
1 start bit and 1 stop bit). These values allow you to calculate the approximate amount of traffic on the
downstream Modbus network as follows:
Volume of periodic traffic (300 ms period)..................... [ (11.5 + 10.5) + (14.5 + 11.5) ] × (8 + 1 + 1) = 480 bits
For 1 TeSys U motor starter ............................................................... 1 × 480 × (1,000 ÷ 300) = 01,600 bits/s
For 8 TeSys U motor starters ........................................................... 8 × 480 × (1,000 ÷ 300) = 012,800 bits/s
As a result, on a network operating at 9,600 bits/s, you will need to considerably increase the cycle time for
all or part of the periodic Modbus commands. On the other hand, at a speed of 19,200 bits/s (default
speed), the available bandwidth is sufficient to allow proper communications, even in occasional degraded
mode (frames re-transmission), and to allow the use of aperiodic parameter reading/writing exchanges.
1744087 03/2009
117
Appendix C: Default Configuration
Content of the Gateway’s DPRAM Memory
The LUFP7 gateway’s DPRAM memory contains all of the data exchanged between the gateway and the
8 TeSys U motor starters, as well as two special registers only exchanged between the gateway and the
Profibus-DP master (words used for managing the downstream Modbus network).
The flow of data exchanged between the TeSys U motor starters, the gateway and the Profibus-DP master is
shown below, in order to highlight the role of the gateway’s memory in these exchanges:
TeSys U motor starters
LUFP7 Gateway
Outputs
OUTPUT data
memory zone
Modbus
c d
e
j
Inputs
Outputs
Profibus-DP master
(TSX 57353 + TSX PBY 100)
Profibus-DP
INPUT data
memory zone
Inputs
.
NOTE: The total number of input and output bytes should be less than or equal to 416 bytes. It is therefore not
possible to configure both the maximum number of input bytes and the maximum number of output bytes, which
are both equal to 244 bytes.
Input Data Memory Area
The gateway has 244 input bytes. Only the first 32 bytes are used. Byte 0x0012 is used for adjusting the
following 16-bit data, so that they can be aligned on even addresses, and for obtaining a total size of 32 input
bytes. One should therefore configure only one 32-byte input/output module using a Profibus-DP configuration
device such as SyCon.
Service
Managing the downstream Modbus network
Periodic communications
—
Monitoring of
TeSys U motor starters
——
Aperiodic communications
—
Reading the value of a
motor starter parameter
(RESPONSE)
Aperiodic communications
—
Writing the value of a
motor starter parameter
(RESPONSE)
Aperiodic communications
(“Trigger bytes” for the responses)
——
——
118
Address
0x0000
0x0002
0x0004
0x0006
0x0008
0x000A
0x000C
0x000E
0x0010
0x0012
0x0013
0x0014
0x0015
0x0016
Size
1 word
1 word
1 word
1 word
1 word
1 word
1 word
1 word
1 word
1 byte
1 byte
1 byte
1 byte
1 word
Description
Gateway status word
Value of the motor starter c status register
Value of the motor starter d status register
Value of the motor starter e status register
Value of the motor starter f status register
Value of the motor starter g status register
Value of the motor starter h status register
Value of the motor starter i status register
Value of the motor starter j status register
Free memory location
Slave no. (0x01 to 0x08)
Function number (0x03)
Number of bytes read (0x02)
Value of the parameter read (0xxxxx)
0x0018
0x0019
0x001A
0x001C
1 byte
1 byte
1 word
1 word
Slave no. (0x01 to 0x08)
Function number (0x06)
Address of the parameter written (0xxxxx)
Value of the parameter written (0xxxxx)
0x001E
0x001F
0x0020
…
0x00F3
0x00F4
…
0x01FF
1 byte
1 byte
1 byte
…
1 byte
1 byte
…
1 byte
Read parameter response counter
Write parameter response counter
Free input area
(212 bytes)
Unusable input area
(268 bytes)
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Output Data Memory Area
The gateway has 244 output bytes. Only the first 32 bytes are used. One should therefore configure only one 32byte input/output module using a Profibus-DP configuration device such as SyCon.
Service
Address
Size
Managing the downstream
Modbus network
0x0200
1 word
Profibus-DP master command word
0x0202
1 word
Value of the motor starter c command register
0x0204
1 word
Value of the motor starter d command register
0x0206
1 word
Value of the motor starter e command register
0x0208
1 word
Value of the motor starter f command register
0x020A
1 word
Value of the motor starter g command register
0x020C
1 word
Value of the motor starter h command register
0x020E
1 word
Value of the motor starter i command register
0x0210
1 word
Value of the motor starter j command register
Aperiodic communications
—
Reading the value of a
motor starter parameter (QUERY)
0x0212
1 byte
Slave no. (0x01 to 0x08)
0x0213
1 byte
Function number (0x03)
0x0214
1 word
Address of the parameter to be read (0xxxxx)
0x0216
1 word
Number of parameters to be read (0x0001)
Aperiodic communications
—
Writing the value of a
motor starter parameter (QUERY)
0x0218
1 byte
Slave no. (0x01 to 0x08)
0x0219
1 byte
Function number (0x06)
0x021A
1 word
Address of the parameter to be written (0xxxxx)
0x021C
1 word
Value of the parameter to be written (0xxxxx)
Aperiodic communications
(“Trigger bytes” for the queries)
0x021E
1 byte
Read parameter query counter
0x021F
1 byte
Write parameter query counter
——
0x0220
…
0x02F3
1 byte
…
1 byte
Free output area
(212 bytes)
——
0x02F4
…
0x03FF
1 byte
…
1 byte
Unusable output area
(268 bytes)
Periodic communications
—
Controlling
TeSys U motor starters
Description
Total Number of Modbus Queries and Responses
The total number of Modbus queries and responses is equal to 36 (2 periodic queries and 2 periodic
responses for each of the 8 TeSys U motor starters, plus 2 aperiodic queries and 2 aperiodic responses for all of
these motor starters). Since the total number of the Modbus queries and responses one can configure for a
single gateway is limited to 100, there are 64 spare Modbus queries and responses (that is to say the equivalent
of 32 Modbus commands).
So, this reserve allows the addition of up to 4 Modbus commands for each one of the 8 TeSys U motor starters,
as this would require the use of 64 Modbus queries and responses (4 times 1 query and 1 response for each of
the 8 motor starters; i.e. 4 × (1+1) × 8).
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Appendix D: Sample Use under PL7 PRO
A practical example can be found on the http:///www.schneider-electric.com website. It is composed of four files.
• The first file, “LUFP7_Tutorial_EN.pb”, is a SyCon file for a Profibus-DP network. It therefore represents
the configuration of the Profibus-DP network, as it is described in the previous chapters. This file is useful
only if you wish to change the configuration.
• The second file, “LUFP7EN.cnf”, is the configuration file exported in ASCII format from SyCon. It
corresponds to the configuration defined in the previous file. You must therefore generate a new “.cnf” file
if you change the first file or use another “.pb” file.
The “LUFP7EN.cnf” file should be copied to the “C:\PL7USER\” directory. If you copy it to another
directory, you should specify its location, under PL7 PRO, using the “Load CNF” button available in the
TSX PBY 100 board configuration screen.
• The
third
and
fourth
file,
“lufp7_tutorial_EN_tsx57353.stx”
and
“lufp7_tutorial_EN_tsx57202.stx”, are PL7 PRO files and therefore represents the actual example
for a TSX Premium PLC with respectively a TSX57353 processor and TSX57202 processor. The next
chapters deal with its content and the way to use those files.
The configuration of the two SyCon files corresponds exactly to what is described in the previous chapters.
Therefore, their content is not detailed here. However, the PL7 PRO file is described below, based on the
structure of the program sections used and the related operating screens.
Overview of the “LUFP7 - Tutorial Example”
In this example, the various program sections and subprograms (icon ), and also the operations screens (icon )
are organized as follows:
• LUFP7 gateway initialization and diagnostics:
Handshake_lufp7
Handshake_master
LUFP7 Gateway Exchanges
• Control and supervision screen for the 8 TeSys U motor
starters:
Cmde_mon
Sr0
Supervision Control
• Reading and writing of any TeSys U motor starter
parameter (service similar to the “parameter area PKW”):
Pkw_service
PKW Service
Each of the groupings presented above is described in an
independent chapter.
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This description remains concise, because it is only meant to describe the overall operation of the program and
the way to use the related screen. If you need further detail, review the actual content of the example under
PL7 PRO.
The source code has comments to help you understand how this works. Each "program" file starts with a short
description of the way it operates; each line includes a comment.
Each variable used has a symbol whose name describes its use. Use keyboard shortcuts “Ctrl+E” and “Ctrl+F”
to display the variables by addresses (e.g. %MW80) or by symbols (e.g. Pkw_checked_boxes_slave).
Two animation tables (icon ) have been created, “Lufp7_inputs_outputs” and “Parameter_read_write.” The first
animation table presents the I/O that correspond to the exchanges with the LUFP7 gateway, i.e. %IW4.0 to
%IW4.0.15 and %QW4.0 to %QW4.0.15. The second table presents the I/O related to the aperiodic service for
reading/writing the value of any motor starter parameter, and also some local variables used by this service. In
the context of this example, this service is also called “PKW” due to its limited similarity with the PKW service
implemented on a few other products from Schneider Electric.
NOTE: This service was not implemented the same way as the PKW service and must therefore not be used
identically.
Gateway Initialization and Diagnostics
The “LUFP7 gateway exchanges” operating screen comprises four separate sections:
• Hexadecimal display of gateway input data (%IW4.0 to %IW4.0.15) in the INPUTS frame. These inputs are
named and grouped in the same manner as in this guide (see chapter 4.2.9). Of course, the display of
these input data is correct only if the gateway default configuration is used.
For INPUTS: A green/red LED indicates whether the various input data have already been updated by the
gateway. It is associated to bit 13 (ABC_DU) of the gateway status word.
NOTE: This input data includes periodic Modbus data (controlling and monitoring) and aperiodic Modbus
data (parameter reading/writing). For the LED to turn green, both parameter read and write commands must
have received a response from a Modbus slave.
A second green/red LED indicates whether the input data are updated on a periodic basis or not by the
gateway, i.e. if periodic exchanges take place properly with all Modbus slaves. It is associated to bit 12 of
the gateway status word. Unlike the first LED, only one Modbus command per slave should receive a
response on a periodic basis for this LED to remain green.
• Hexadecimal display of gateway output data (%QW4.0 to %QW4.0.15) in the OUTPUTS frame.
For OUTPUTS: The green/red LED indicates whether the Profibus-DP master wants the gateway to
communicate with the Modbus slaves. It is associated to bit 13 (FB_DU) of the Profibus-DP master
command word, which is updated in the “Handshake_master” program, in accordance with the user controls
described below.
• User controls for enabling / disabling exchanges on the gateway Modbus sub-network. These two exclusive
buttons are meant to switch the value of bit 13 (FB_DU) of the Profibus-DP master command word and to
generate a new control meant for the gateway (see “Handshake_master” program description and
chapter 5.2.1).
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• Comprehensive display of LUFP7 gateway diagnostics, via a thorough interpretation of the gateway status
word (see chapter 5.2.2). This interpretation is made in the program “Handshake_lufp7”.
A button appears as soon as a new diagnostic is made available by the gateway for the Profibus-DP
master. Pressing that button takes the new value of the gateway status word into account and
acknowledges the new diagnostic.
The “Handshake_master” program assists the screen presented on the previous page in conducting the
following tasks:
• Display of two buttons meant for enabling and disabling exchanges on the gateway Modbus sub-network.
• Transmission (to the gateway) of the command related to the button pressed by the user. This is done only
once the gateway acknowledges the previous command, i.e. once bit 14 of the gateway status word has the
same value as bit 14 of the Profibus-DP master command word.
In that case, bit 13 of the Profibus-DP master command word is updated in accordance with the user
command, and the value of its bit 14 is inverted to notify the gateway of the presence of a new command.
NOTE: The LED, the two buttons, and the related processings, should not be used with the gateway default
configuration as the choice retained for the “Control/Status Byte” option is “Enabled but no startup lock”
(see chapter 5 and chapter 5.2). These elements are therefore only meant to make this example compatible
with the “Enabled” option (see chapter 5.1).
The “Handshake_lufp7” program also assists the screen described on the previous page in conducting the
following tasks:
• Display the button meant to take the content of the gateway status word into account. This button is
displayed only if a new diagnostic is available, i.e. if the value of bit 15 of the gateway status word is
different from that of bit 15 of the Profibus-DP master command word.
• When the user presses that button, the content of the gateway status word is analyzed in order to generate
four separate messages according to the following data: gateway input data update/validity (bit 13),
periodicity of Modbus exchanges (bit 12), error code (bits 8-11) and unit/nature of the data element related
to the error code (bits 0-7).
Bit 15 of the Profibus-DP master command word is then set to the same value as bit 15 of the gateway
status word to notify the gateway that the diagnostic has been taken into account and it can therefore
deliver a new one.
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Controlling and Supervising the 8 TeSys U Motor Starters
The “Supervision Control” operating screen (see picture below) is meant to monitor the status of the 8 TeSys U
motor starters, numbered from 1 to 8. It is also meant to control them individually using several buttons.
Registers 455 and 704 of each of the 8 TeSys U motor starters are used to conduct this control and supervision:
455 – TeSys U status register (IEC61915)
Bit 0 ..........Motor starter ready
Bit 1 ..........Contactor in the ON position ( 1
Bit 2 ..........Fault (trip or dropout)
Bit 3 ..........Alarm presence
Bit 4 ..........Specific: Tripped ( I >> )
Bit 5 ..........Specific: Fault reset authorized
Bit 6 ..........Specific: A1-A2 supply
Bit 7 ..........Specific: Motor running
Bits 8-13 ...Motor current (2#10 0000 = 200%)
Bit 14 ........Reserved: Local control
Bit 15 ........Ramping (motor starting)
)
704 – (IEC61915) command register
Bit 0 ..........Reserved: Run forward
Bit 1 ..........Reserved: Run reverse
Bit 2 ..........Reserved (stopping)
Bit 3 ..........Reset
Bit 4 ..........Reserved (emergency start)
Bit 5 ..........Self test: Triggering test (trip)
Bit 6 ..........Reserved (low speed)
Bits 7-11 ...Reserved by the IEC61915 standard
Bit 12 ........Specific: Overload (shunt trip)
Bit 13 ........Specific: Pause (reserved for adjustment)
Bits 14-15 .Specific: Reserved
These statuses and controls are grouped in two sections: “General Status”, for the general operating mode of
the motor starters, and "Motor" for the general operating mode of controlled motors. The last section, “DEBUG
COMM.”, displays the registers %IW and %QW used for each motor starter.
This screen is represented below, but only for the first motor starter, as it is identical for the 7 others.
Most displays in this operating screen are directly tied to the %MW
registers containing the values of registers %IW4.0.1 to %IW4.0.8 and
%QW4.0.1 to %QW4.0.8 (status and command registers of the TeSys U
motor starters). Only the indirect controls and statuses are described
below.
The “Cmd_mon” program conducts the following tasks:
• Copy the values of words %MW20 to %MW27 to output registers
%QW4.0.1 to %QW4.0.8, and copy the values of input registers
%IW4.0.1 to %IW4.0.8 to words %MW10 to %MW17.
These data are copied because word bit extraction can be carried out
on %MW indexed words, but not on %IW indexed words. Actually, the
sub-program “Sr0” uses word indexing to a large extent, as it makes it
possible to process any motor starter, since it is designated by the word
%MW0. E.g.: “%MW10[%MW0]:X13” is allowed, but not
“%IW4.0.1[%MW0]:X13”.
Furthermore, the input and output words are copied one by one, as
PL7 PRO does not support expressions such as “%IW4.0.1:8”.
• “Sr0” sub-program calling loop, whose purpose is to control and
monitor of the 8 TeSys U motor starters. Upon each iteration of this
loop, the word %MW0 (“Module”) takes a value from 0 to 7 in order
to be used as an index for words %MW10 to %MW17 (inputs) and
%MW20 to %MW27 (outputs).
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The “Sr0” sub-program is called once per motor starter from the “Cmd_mon” program. Each of these calls
should be made with a different value in the word %MW0 (between 0 and 7) as it is used to index the status
word and the command word of the same motor starter. The sub-program assists the screen presented on the
previous page in conducting the following tasks:
• Determine the overall status of the motor starter with:
contactor on the motor starter is in the ON position, or
in case of triggering (tripped),
in all other cases.
• Use the commands generated by buttons
pause mode (bit 13 of the command word).
to set the motor starter in off-pause or in
and
NOTE: The "pause" mode should not be used for a normal application; you should rather use the
REV and STOP buttons (see below).
• Activate the fault reset command (bit 3 of the command word) if the user pressed the
fault LED is on: . Once this command is on, it is cancelled as soon as the LED goes off:
if the
FOR
,
button and the
.
• Activate the self test command (trip) of the motor starter (bit 5 of the command word) if the user pressed the
button and the “Tripped” LED is off:
. Once the command is on, it is cancelled as soon as
the LED goes on:
.
• Evaluate the value of the motor current, given as a percentage of the IR current value (unit = % FLA). Bits 8
(LSB) to 13 (MSB) of the motor starter status word are extracted and the appropriate unit (.e. 3,125% FLA),
is then used to evaluate the current. The maximum value is therefore equal to 63, i.e. 196,875% FLA.
• Use buttons
,
and
exclusively to enable only one of the three following controls at a
time, while resetting the other two to zero, in descending priority order: stopping (bit 2 of the command
word), run forward (bit 0), and run reverse (bit 1).
Reading and Writing any TeSys U Motor Starter Parameter
NOTE:
ƒ Although the term “PKW” is used in the current example, the service for which an example is described
here should not be confused with the PKW service of other products from Schneider Electric. These two
services are different but can also be compared due to their main purpose, which consists in
reading/writing the value of any parameter on any Modbus slave.
ƒ However, contrary to the true PKW service, the aperiodic parameter reading/writing service used here
does not support the Modbus broadcast feature (i.e. do not ever use address 0 to access all Modbus
slaves at the same time). In addition, the internal settings of the LUFP7 gateway cannot be accessed
using this service.
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The “PKW Service” operation screen allows the user to issue the reading or the writing of a register on any
Modbus slave (mainly one of the 8 TeSys U motor starters from the default configuration). This screen is subdivided into a number of frames, described and displayed hereafter:
• The first frame, “Slave Address,” is used to
select the station the aperiodic parameter
reading/writing service will poll. Only one
box can be checked at any given time.
Depending on the box currently checked
when the “SEND command” button is being
pushed, the “Slave” field of the reading
(MSB of %QW4.0.9) or writing (MSB of
%QW4.0.12) command will be updated
accordingly. The “Other address:” box allows
the user to type in an address ranging from
1 to 247.
• The second frame, “Parameter Address,” allows you to set the address of the parameter to read/write.
When the “SEND command” button is being pushed, the value currently set in this frame is copied into the
“Read parameter address” field of the reading command (%QW4.0.10) or into the “Written parameter
address” field of the writing command (%QW4.0.13).
• The third frame, “Value for WRITING,” will only be used if the “Parameter Writing” command is to be issued.
The transfer of any value set in this frame into the “Written parameter value” field of the writing command
(%QW4.0.14) is done whenever the “SEND command” button is being pushed, provided the “Parameter
Writing” box is checked.
• The fourth frame, “Command,” allows you to select the command that will be issued for the aperiodic
parameter reading/writing service: read command or write command. Only one box can be checked at any
given time.
• The “SEND command” button triggers the update of the gateway’s periodic output data (%QW4.0.9 à
%QW4.0.14) in such a way that the gateway will issue the command that matches the settings and values
from the frames previously described. The reading command is issued using the %QW4.0.9 to %QW4.0.11
outputs and the writing command is issued using the %QW4.0.12 to %QW4.0.14 outputs. All these updates
are performed in the “Pkw_service” program. A new command is issued and sent each time a modification
is brought to the value of the MSB byte (for reading) or to the value of the LSB byte (for writing) of the
%QW4.0.15 output.
E.g. In the example displayed above, the frames are used to issue a command intended to read (0x03, i.e.
the function code that stands for the “Read Holding Registers” Modbus function) the value of the register
no. 455 (address = 0x01C7) on the TeSys U motor starter no. 3 (0x03). The number of read parameters is
necessarily equal to 1 (0x0001), but this data is still updated by the “Pkw_service” program because it is
part of the Modbus command frame the gateway will issue.
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• The next four frames, located beneath and apart from the other ones, are intended to diplay the output data,
transmitted to the gateway so that it will issue the corresponding Modbus query, the input data, as received
by the gateway from one of its Modbus slaves in response to this query, the counters used by the gateway
to trigger the emission of a command, and the counters updated by the gateway in order to mark the
reception of a response. The upper frame is dedicated to the reading command (%QW4.0.9 to %QW4.0.11
for the query sent by the gateway and %IW4.0.9 to %IW4.0.11 for the response sent back by the Modbus
slave) and the middle frame is dedicated to the writing command (%QW4.0.12 to %QW4.0.14 for the query
sent by the gateway and %IW4.0.12 to %IW4.0.14 for the response sent back by the Modbus slave).
Finally, the lowest two frames display the counters (or “Trigger bytes”) associated to these queries and
responses. The queries counters are transmitted to the gateway using the %QW4.0.15 output, whereas the
responses counters are read using the %IW4.0.15 input. The contents of these two words is broken down in
order to isolate the values of these 8-bit counters.
The example below follows the previously described example, as the output and input data for the aperiodic
parameter reading/writing service match the settings and values of the other frames. Here, the value of the
parameter is equal to 0x02C3. The middle frame has no valid data because the gateway has not yet been
requested by the Profibus-DP master to send any write command.
The “Pkw_service” program includes the ST instructions that use the settings and values from the first frames
of the previously described “PKW Service” operation screen. These instructions are mainly designed to update
the PLC outputs that relate to the commands of the aperiodic parameter reading/writing service (%QW4.0.9 to
%QW4.0.11 for the read command, %QW4.0.12 to %QW4.0.14 for the write command, and %QW4.0.15 for the
counters associated to these two commands). This program processes the following tasks:
• Test of all the checkboxes from the “Slave” and “Command” parts of the screen. If none of the boxes from
each of these two parts is currently checked, one of them will be checked by default (Slave = TeSys U
no. 1; Command = Parameter Reading).
• Comparison of the values that correspond to these checkboxes over two consecutive PLC cycles in order to
keep only one checked box at any given time in each part.
• When the “SEND command” button is detected as being pushed, this program first updates some local
variables, then updates the outputs that relate to the aperiodic parameter reading/writing service. This twotimes update procedure is intended to cut off the outputs update from the rest of the program. The output
data of the gateway are update on a conditionnal basis:
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ƒ Parameter Reading Æ Updates the %QW4.0.9 to %QW4.0.11 outputs in order for the gateway to issue
the corresponding Modbus reading query (data displayed in the “Query (LUFP7 Outputs)” part of the
“READING of a parameter value” frame). An 8-bit local counter is incremented each time a new query is
issued (the 0 value being reserved, it will be replaced with 1), then transmitted to the gateway using the
MSB byte of the %QW4.0.15 output.
The response from the polled slave will then be used by the gateway in order to update the %IW4.0.9 to
%IW4.0.11 inputs (data displayed in the “Response (LUFP7 Inputs)” part of the “READING of a
parameter value” frame). Each time such a response is received, the gateway increments the MSB byte
of the %IW4.0.15 input in order to tell the Profibus-DP master that it has received a new response. This
8-bit counter is not used in this example.
ƒ Parameter Writing Æ Updates the %QW4.0.12 to %QW4.0.14 outputs in order for the gateway to issue
the corresponding Modbus writing query (data displayed in the “Query (LUFP7 Outputs)” part of the
“WRITING of a parameter value” frame). An 8-bit local counter is incremented each time a new query is
issued (the 0 value being reserved, it will be replaced with 1), then transmitted to the gateway using the
LSB byte of the %QW4.0.15 output.
The response from the polled slave will then be used by the gateway in order to update the %IW4.0.12 to
%IW4.0.14 inputs (data displayed in the “Response (LUFP7 Inputs)” part of the “WRITING of a
parameter value” frame). Each time such a response is received, the gateway increments the LSB byte
of the %IW4.0.15 input in order to tell the Profibus-DP master that it has received a new response. This
8-bit counter is not used in this example.
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Appendix E: Profibus-DP Data and Diagnostics
The various elements presented here are detailed in the documentation of the Profibus-DP master you will have
to use. In the case of the TSX PBY 100 coupler of the Premium automatic controls, for example, these elements
are detailed in the Implementation Manual – TSX PBY 100 – PROFIBUS-DP (ref.: TSX DM PBY 100E), and in
the PL7 PRO on line help (help path: Communication Æ Profibus-DP).
However, the most important elements are reproduced here in order to make the LUFP7 gateway easier to use.
Gateway Profibus-DP Diagnostics
These diagnostics are the gateway's response to a specific command generated by a Profibus-DP master. This
command enables the master to check the status of one of its slaves.
In the case of the LUFP7 gateway, the response length is equal to 6 bytes, i.e. the minimum standard and
mandatory length for a response to a diagnostic command.
Under PL7 PRO, this response can be viewed in two different ways:
• In the “Debug” screen of the TSX PBY 100 coupler, when the slave
whose address corresponds to the gateway's is selected. The
gateway Profibus-DP diagnostics are then displayed in the
"PROFIBUS-DP diagnostic data". An example is given on the right.
It is an excerpt from the screen represented in chapter 4.2.12.
• Using the SEND_REQ function, the 0x0031 command code, and requesting specifically a diagnostic from
the slave concerned.
The table below describes the structure and content of the gateway response to a Profibus-DP diagnostic
command sent to it:
Bytes
0
1
2
3
4-5
6-244
128
Structure
Description
x0: not_reachable
x1: not_ready
x2 : config_fault
x3 : ext_diag
x4 : not_supported
x5 : invalid_rsp
x6 : param_fault
x7 : master_lock
x0: prm_required
x1 : diag_data_rdy
x2 : is_slave_diag
x3 : wdt_active
x4 : freeze_mode
x5 : sync_mode
x6 (non utilisé)
x7 : inactive
x0..x6 (unused)
x7: diag_overflow
master_address
x0=1 if the slave is non connected or switched off
x1=1 if the slave is not ready for data exchange
x2=1 if there is a slave configuration error upon test request
x3=1 if extended diagnostic (bytes 7-255); x3=0 for the LUFP7 gateway
x4=1 if the function is not supported by the slave
x5=1 if there is an error in the slave's first response
x6=1 if there is an error in the slave's last setting message
x7=1 if the slave is already set up by another master module
x0=1 if the slave should be configured and set up again
x1=1 if the slave generated a diagnostic to be processed by the master
x2=0/1 if the diagnostic was created by the master / by the slave
x3=1 if the slave's watchdog is active
x4=1 if the selected slave inputs are frozen
x5=1 if the selected slave outputs are frozen
——
x7=1 if the slave is inactive (excluded from the processing)
——
x7=1 if the number of diagnostic bytes exceeds the size of the reception words
Address of the master module that sets up the slave
PNO_identifier
Slave's identification code
specific_diag (unused)
Optional specific diagnostic data (none for the LUFP7 gateway)
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Appendix E: Profibus-DP Data and Diagnostics
Gateway Configuration Data
These data are transmitted to the Profibus-DP master upon gateway initialization exchanges. These exchanges
enable the Profibus-DP master to set up, configure, and diagnose each of the slaves. The TSX PBY 100 coupler
conducts these setup exchanges, but they are not documented in its Implementation Manual. Please refer to the
general documentation about the Profibus-DP standard if you want further information about initialization
exchanges.
If you want to review the configuration data that have been exchanged during Profibus-DP slave setup, you may
use the SEND_REQ function in an application developed using PL7 PRO. You must then use the 0x0031
command code and specifically request the reading of the configuration data for the slave concerned (see
Implementation Manual of the TSX PBY 100 coupler).
The table below describes the structure and content of the response issued by the TSX PBY 100 coupler to a
read command of the LUFP7 gateway configuration data:
Bytes
Name
Description
Total length
Total length of the configuration information, in bytes
2
Number of %IW
Total size of the input data in the %IW area
3
Number of %QW
Total size of the output data in the %QW area
4-5
%IW offset
Offset of the input data blocks in the %IW area
6-7
%QW offset
Offset of the output data blocks in the %QW area
8
Station Status
Configuration of the slave's services (see Profibus-DP standard)
9
Watchdog Factor 1
Slave timeout (see Profibus-DP standard):
10
Watchdog Factor 2
Timeout = (Watchdog Factor 1) × (Watchdog Factor 2) × 10 ms
11
Min TSDR
Minimum slave TSDR (see Profibus-DP standard)
PNO_Identifier
Slave identification number (see Profibus-DP standard)
14
Group Flags
Identifiers that characterize the slave's group (see Profibus-DP standard)
15
Address ID
Slave's address on the bus
16
Modular slave
Value = 0x00 / 0x01 if the slave is a compact / modular equipment device
17
Active slave
Value = 0x00 / 0x01 if the slave is inactive/active on the network
18-19
Parameters size
Size (a bytes) of the parameters data block for that slave
20-21
Configuration data size
Size (b bytes) of the configuration data block for that slave
22-23
Size of the data used
Size (c bytes) of the data block used for that slave
24(23+a)
Parameters
Parameters data block for that slave
Configuration data
Configuration data block for that slave
0-1
12-13
(24+a)(23+a+b)
(24+a+b)Data used
(23+a+b+c)
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Data block used for that slave
129
Appendix E: Profibus-DP Data and Diagnostics
For the LUFP7 gateway default configuration, the following response is received from the TSX PBY 100 coupler:
Bytes
0-1
2
3
4-5
6-7
8
9
10
11
12-13
Name
Total length
Number of %IW
Number of %QW
%IW offset
%QW offset
Station Status
Watchdog Factor 1
Watchdog Factor 2
Min TSDR
PNO_Identifier
Value
0x0019
0x10
0x10
0x0000
0x0000
0x38
0x14
0x01
0x0B
0x071F
Bytes
14
15
16
17
18-19
20-21
22-23
——
24
——
Name
Group Flags
Address ID (1)
Modular slave
Active slave
Settings size
Configuration data size
Size of the data used
Settings
Configuration data
Data used
Value
0x00
0x02
0x01
0x01
0x0000
0x0001
0x0000
———————
0x7F
———————
(1) This value corresponds to the gateway address on the Profibus-DP network, and its value depends on the position of
the two coding wheels described in chapter 2.7.1.
NOTE: Depending on the network configuration and status, the resulting data are likely not to be strictly
identical to the ones presented above.
General Gateway Information
Another command, also sent to a Profibus-DP master, makes it possible to obtain less detailed information than
a slave's configuration data, and the values of statistic counters related to the exchanges between the queried
master and the slave.
If you wish to review the general information regarding a Profibus-DP slave, you may use the SEND_REQ
function in an application developed using PL7 PRO. Then, you must use the 0x0031 command code and
specifically request that the information for the slave concerned be read (see Implementation Manual of the TSX
PBY 100 coupler).
The table below describes the structure and content of the response issued by the TSX PBY 100 coupler to a
read command of the LUFP7 gateway general information:
Bytes
0
1
2-3
4-5
6
7
8
9
10
11
12
13
130
Name
Description
Configured
0x01 if the slave was configured in accordance with Profibus
Operating
0x01 if the slave has been set up and operates properly
Number of %IW
Total size (words) of the input data in the %IW area
Number of %QW
Total size (words) of the output data in the %QW area
Input data size
Total size (bytes) of the input data on Profibus
Output data size
Total size (bytes) of the output data on Profibus
Diagnostic data size
Total size (bytes) of the first diagnostic received
Compact diagnostic
Compact diagnostic data for that slave
Diagnostic counter
Total number of diagnostic messages received from that slave
Exchange counter
Number of exchanges between the master and this defective slave
Unavailability counter
Number of times this slave is present but unavailable
Invalid response counter
Number of invalid responses for this slave
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Appendix E: Profibus-DP Data and Diagnostics
For the LUFP7 gateway default configuration, the following response is received from the TSX PBY 100 coupler:
Bytes
0
1
2-3
4-5
6
7
Name
Configured
Operating
Number of %IW
Number of %QW
Input data size
Output data size
Value
0x01
0x01
0x0010
0x0010
0x20
0x20
Bytes
8
9
10
11
12
13
Name
Diagnostic data size
Compact diagnostic
Diagnostic counter (1)
Exchange counter (1)
Unavailability counter (1)
Invalid response counter (1)
Value
0x06
0x00
0x0A
0x02
0x03
0x02
(1) The values of all four counters vary while the coupler and gateway are operating. These are modulo 256 counters, i.e.
their values loop back from 255 to 0.
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131
Appendix F: Modbus Commands
Only the Modbus commands shown in
the right-hand table are supported by
the gateway. The structure of the query
and response frames for each of these
commands is then described in the
following chapters.
Function code
Broadcast (1)
Modbus command
03
0x03
—
Read Holding Registers
06
0x06
Yes
Preset Single Register
16
0x10
Yes
Preset Multiple Registers
(1) The content of this column shows whether the command can be added (“Yes”) or not (“—”) to the list of a
broadcaster node’s commands, known as “Broadcaster” in ABC-LUFP Config Tool.
In the following chapters, each byte of the query and
response frames of a Modbus command are
described, one after another, with the exception of the
fields shown opposite. These are always present in
the queries and responses of all Modbus commands.
The “Slave Address” and “Function” fields are the first
two bytes of these frames. The two bytes of the
“Checksum” are their last two bytes.
Slave Address
Function
- Value cannot be changed (Modbus
address: 1 to 247. Addresses 65,
126, and 127 prohibited)
- Value cannot be changed (code of
the Modbus command)
… Specific features of
Modbus commands …
… Other
fields …
Checksum (Lo) - Type of error check
Checksum (Hi) - Number of the 1st byte checked
The descriptions of the Modbus frames which appear in the following chapters are mainly intended to help you to
configure the gateway’s Modbus exchanges using ABC-LUFP Config Tool. Please see the documentation of
each Modbus slave to check for any restriction regarding these frames (number of registers which can be read
or written in a single Modbus command, for example).
It is a better idea to get hold of a standard Modbus document, such as the guide entitled Modicon Modbus
Protocol Reference Guide (ref.: PI-MBUS-300 Rev. J), so that you can see the correspondence between the
elements displayed in ABC-LUFP Config Tool and the content of the corresponding Modbus frames. Here is an
example of a correspondence for a full frame (including the start and end of frame fields shown above), based
on the “Read Holding Registers” Command (0x03):
Modbus
query
Elements under ABCLUFP Config Tool
Slave Address
Function Code
Starting register address
Number of registers
Checksum
Modbus
response
Slave Address
Function Code
Byte count
Data
Checksum
132
Modbus frame fields
Size
Slave no.
Function no.
No. of the 1st word (MSB / LSB)
Number of words (MSB / LSB)
CRC16 (LSB / MSB)
1 byte
1 byte
2 bytes
2 bytes
2 bytes
Slave no.
Function no.
Number of bytes read
Value of 1st word (MSB / LSB)
…………………………………
Value of last word (MSB / LSB)
CRC16 (LSB / MSB)
1 byte
1 byte
1 byte
2 bytes
…………
2 bytes
2 bytes
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Appendix F: Modbus Commands
Chapter 6.12, also shows a few examples of correspondences between the elements displayed in ABC-LUFP
Config Tool and the corresponding Modbus frame fields.
See also: Chapter 6.12.2, and chapter 6.12.3, if the implementation of one of these commands would be
incompatible with its implementation in the gateway, for example. You then have to create a special Modbus
command to compensate for this incompatibility.
NOTE: Here, the notions of “input” and “output” (and assimilated) are irrelevant, as all Modbus commands have
access to all of a Modbus slave’s memory. However, these names are retained in order to comply with the
terms used in the standard Modbus documentation.
“Read Holding Registers” Command (0x03)
Frame
Query
Response
Field
Starting Address (MSB)
Starting Address (LSB)
Number of points (PF)
Number of points (Pf)
Byte count
Data (first register / MSB)
Data (premier registre / Pf)
………
Data (dernier registre / PF)
Data (dernier registre / Pf)
Value or properties
- Address of the 1st output / internal register
- Number of output / internal registers
- Number of data bytes = Number of output / internal registers × 2
- Byte swap = “No swapping” (or “Swap 2 bytes”)
- Data length = Value of the “Byte count” field
- Data location = Address in the gateway’s input memory
“Preset Single Register” Command (0x06)
Frame
Query
Field
Register (MSB)
Register (LSB)
Preset data (MSB)
Preset data (LSB)
Response
Register (MSB)
Register (LSB)
Preset data (MSB)
Preset data (LSB)
Value or properties
- Address of the output / internal register
- Byte swap = “No swapping” (or “Swap 2 bytes”)
- Data length = 0x0002
- Data location = Address in the gateway’s output memory
- Byte swap = “No swapping” (or “Swap 2 bytes”)
- Data length = 0x0002
- Data location = Address in the gateway’s input memory
NOTE: These data are an echo to the query. So in most cases there is no
need to feed them back to the Profibus-DP master.
NOTE: Instead of creating a link between the echo of the response to the “Preset Single Register” Command
(0x06) and the memory area dedicated to the Profibus-DP inputs (0x0002-0x00F3), you’d better link it with the
address 0x0400.
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133
Appendix F: Modbus Commands
“Preset Multiple Registers” Command (0x10)
Frame
Query
Response
Field
Starting Address (MSB)
Starting Address (LSB)
Number of Registers (MSB)
Number of Registers (LSB)
Byte Count
Data (first register / MSB)
Data (first register / LSB)
………
Data (last register / MSB)
Data (last register / LSB)
Starting Address (MSB)
Starting Address (LSB)
Number of Registers (MSB)
Number of Registers (LSB)
Value or properties
- Address of the 1st output / internal register
- Number of output / internal registers
- Number of data bytes = number of output / internal registers × 2
- Byte swap = “No swapping” (or “Swap 2 bytes”)
- Data length = Value of the “Byte count” field
- Data location = Address in the gateway’s output memory
- Address of the 1st output / internal register
- Number of output / internal registers
Modbus Protocol Exception Responses
When it cannot process a command dictated by a Modbus query, a slave sends an exception response instead
of the normal response to the query.
! WARNING
UNATTENDED OPERATION OF THE SYSTEM
With standard Modbus commands, the LUFP7 gateway considers that all the exception responses it receives
from Modbus slaves are incorrect responses. As a result, it will carry out the re-transmissions configured for
the queries involved.
If you want the software application for your Profibus-DP master to be able to specifically manage exception
responses, you can replace the Modbus command, in ABC-LUFP Config Tool, with a personalized command
(see chapter 6.12.3.2). This then allows you to feed back the “Slave Address” and “Function” fields to the
Profibus-DP master.
Failure to follow this instruction can result in death, serious injury, or equipment damage.
The structure of an exception response is independent of the Modbus command associated with the “Function”
field of the query involved. The whole frame of an exception response is shown below:
Slave Address
Function
Exception Code
Checksum (Lo)
Checksum (Hi)
134
Modbus address (1 to 247; addresses 65, 126 and 127 prohibited): The value of this field is
identical to that of the “Slave Address” field of the query involved.
Command code, with exception indicator: The value of this field is set to 0x80 + the value of
the “Function” field of the query involved.
Code indicating the nature of the error which has caused the exception response (see table
on next page).
Error check
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Appendix F: Modbus Commands
Code
0x01
0x02
0x03
0x04
0x05
(1)
0x06
(1)
0x07
(1)
0x08
(1)
Name of the
Description of the exception
exception
ILLEGAL FUNCTION The query’s “Function” command code is not implemented in the Modbus slave
software, or it is unable to process it for the moment.
ILLEGAL DATA
The combination of the query’s “Starting Address” and “No. of Registers” fields
ADDRESS
(or assimilated fields) gives access to one or more addresses which are not
accessible on the Modbus slave.
ILLEGAL DATA
The value of one of the Modbus query’s fields is outside the authorized limits.
VALUE
This error does not affect the content of the “Data” (or assimilated) fields, as this
error only takes account of the fields used for managing the Modbus protocol.
SLAVE DEVICE
An unrecoverable failure has occurred when processin the command.
FAILURE
ACKNOWLEDGE
The Modbus slave informs the gateway that it has accepted the command
(acknowledgement), but that it will take too long to process it and it cannot afford
to wait for the completion of this process before sending a response.
The gateway should transmit subsequent queries in order to determine whether
the command has finished or not.
SLAVE DEVICE
The Modbus slave informs the gateway that it is already in the process of
BUSY
running a command and therefore it cannot run the one transmitted to it.
So the gateway should re-transmit the query subsequently.
NEGATIVE
The Modbus slave informs the gateway that it cannot process the requested
ACKNOWLEDGE
command. This exception only affects commands 13 and 14 (0x0D and 0x0E).
These functions are not part of the standard Modbus commands and are not
described in this document.
MEMORY PARITY The Modbus slave informs the gateway that it has detected a parity error on the
ERROR
access to its own memory. This exception only affects standard commands 20
and 21 (0x14 and 0x15) which are not supported by the gateway.
(1) Please see the standard Modbus documentation for further information about these various scenarios.
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135
Appendix G:
Concept and Quantum PLC
The default data type of Concept with a Quantum PLC is "BOOL".
As shown in the first drawing hereafter, "BOOL" should not be used for the data storage of the LUFP7.
The bytes (MSB/LSB) and bits are twisted with data type "BOOL".
The data type for the LUFP7 gateway at Concept should be changed to "INT16" or "UINT16".
In this case the data storage of the gateway and the PLC is identical.
Datatype: Bool
215
LUFP7
1
28 27
0
0
0
0
0
0
20
QUANTUM
0
0
0
20
0
0
0
1
0
0
27 28
0
0
1
0
0
0
0
0
0
215
0
0
0
0
0
1
0
Different data storage at the LUFP7 and Concept
with a Quantum PLC.
The BYTES are twisted with datatype "bool"
Datatype : INT16
215
LUFP7
1
28 27
0
0
0
0
0
0
20
QUANTUM
1
0
0
20
0
0
0
1
0
0
27 28
0
0
0
0
0
0
0
0
0
215
0
0
0
1
0
0
0
Identical DataStorage at the LUFP7 and Concept
with at Quantum PLC
INT16 is the correct datatype
Datatype : UINT16
LUFP7
215
QUANTUM
20
1
1
28 27
0
0
0
0
0
0
0
0
20
0
0
0
1
0
0
27 28
0
0
0
0
0
0
0
0
0
215
0
0
0
1
0
0
0
UINT16 has the same mapping like INT16.
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Index
_________________________________________________________________________________________
2
Line termination, 21
LU9GC03 hub, 19
2-way TSXSCA62 subscriber connector, 19
A
M
Modbus cable, 19
Address, 23
Architecture, 9, 28
P
C
Cable
type A, 20, 22
Communications
aperiodic, 44
periodic, 44
Cycle time, 29
PL7 PRO, 34, 39, 40, 42, 68, 77, 121
Product Related Warning, 5
Profibus-DP master, 34
Protective Earth, 13
R
Related documents, 5
RJ45 connector, 12
D
Data exchanged, 11
Diagnostic LEDs, 12
DIN Rail, 13
S
SyCon, 28, 34, 35, 37, 73, 76, 116, 121
T
E
End of line connector, 22
G
Gateway’s address, 23
GSD file, 36
SCA junction boxes, 17
Topology
bus, 16
TSXCA50 SCA junction box, 19
Type A cable, 20
V
L
VW3 A8 306 RC double termination, 19
VW3 A8 306 TF3 T-junction box, 19
LEDs, 25
Line connector, 22
137
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Glossary
_________________________________________________________________________________________
0x••••
Value expressed in hexadecimal, which is equivalent to the H••••, ••••h and 16#•••• notations,
sometimes used in other documents.
NOTE: The ABC-LUFP Config Tool software uses the 0x•••• notation.
e.g. 0x0100 = 16#0100 = 256.
2#•••• ••••
Value expressed in binary. The number of ‘•’ digits depends on the size of the item of data
represented. Each nibble (group of 4 bits) is separated from the other nibbles by a space.
Examples: byte 2#0010 0111 = 39, word 2#0110 1001 1101 0001 = 0x69D1 = 27089.
ABC-LUFP
Config Tool
Name of the PC software used to configure and monitor the LUFP7 Profibus-DP/Modbus
Gateway.
ASIC
Integrated circuits specific to a given user and application, covering two major families: precharacterised processes and pre-distributed networks.
ATS
Abbreviation of “Altistart” (soft start- soft stop unit).
ATV
Abbreviation of “Altivar” (drive).
CRC
Cyclical Redundancy Check.
LED
Light-Emitting Diode.
DP
Decentralised Periphery (remote I/O). Profibus version or protocol meant for quick
communication with remote I/O. This is the only Profibus protocol supported by the LUFP7
gateway.
DPM1
Class 1 DP master: the central automatic control of a Profibus-DP network. It resets and
controls I/O transfers and slave diagnostics on the network. One can have several DPM1
stations on a given Profibus-DP network, each one steering its own slaves.
DPM2
Class 2 DP master: The programming, configuration, and diagnostic device of a Profibus-DP
network.
Fieldbus
A term referring to the upstream Profibus-DP network in ABC-LUFP Config Tool.
FMS
Profibus-FMS messaging system that defines the objects and application services applicable to
these objects. By extension, the Profibus version or protocol dedicated to complex and advanced
communication tasks at the cell level. This protocol is not supported by the LUFP7 gateway.
GSD
Electronic equipment database, also called GSD file. This term designates the format of the
files (“.gsd” extension) that are used by a Profibus master configuration and adjustment tool to
configure their exchanges according to that same protocol.
Handshake
LRC
An old term referring to the two registers used for initialising and carrying out diagnostics of the
LUFP7 gateway. This term has been replaced by the expression “Control/Status Byte”.
Longitudinal Redundancy Check.
LSB
Least significant byte in a 16-bit word.
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Glossary
MSB
Most significant byte in a 16-bit word.
Node
A term referring to the connection point of a Modbus slave under ABC-LUFP Config Tool.
PA
Profibus version or protocol dedicated to process automation. This protocol is not supported by
the LUFP7 gateway.
PDP
Profibus-DP (see “DP” above).
PI
Profibus International. This term designates the international organization for users of the
Profibus protocol. It is responsible for federating Profibus skills centres, scattered throughout
the 20 largest industrial countries. The list of user groups of the Profibus protocol is available
on the Profibus web site, at http://www.profibus.com/. To get general-purpose support on
Profibus, please email to PI, at: [email protected].
PNO
This term designates the national and local associations of Profibus protocol users.
PPO
Parameter Process data Object. This term designates the type and size of the data exchanged
between a Profibus master and slave. In the case of the LUFP7 gateway, PPOs are not used
to configure its exchanges on the Profibus network.
Profibus
PROcess Field BUS.
PSU
Power supply.
Sub-Network
A term referring to the downstream Modbus network under ABC-LUFP Config Tool.
TSDI
Initiating station request time.
TSDR
Answering station response time.
XML
EXtensible Markup Language. The language used by ABC-LUFP Config Tool to import/export
the configuration of a Modbus slave.
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