Schneider Electric XBTN/R/RT, Uni-Telway Protocol User Guide
Below you will find brief information for XBT N/R/RT. This user guide describes communication between automation systems and the XBT N/R/RT product range using the Uni–Telway protocol. It includes operating principles, software configuration, cable connections, and diagnostics for XBT terminals in Uni-Telway applications, including connecting XBT terminals to Schneider PLCs using RS485 lines.
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Schneider Electric
Uni-Telway Protocol
XBT N/R/RT
33003974 06/2008
2
Table of Contents
Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
About the Book . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Chapter 1
Operating Principle. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Operating Principle of XBT Terminals Using the Uni-Telway Protocol . . . . . . . . 19
Chapter 2
Software Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Uni-Telway Equipment Address Dialog Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Chapter 3
Variable Types Supported . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Chapter 4
Cables and Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Chapter 5
Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Appendices
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Appendix A
RS485 Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Glossary
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Index
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
3
4
Safety Information
§
Important Information
NOTICE 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 to call attention to information that clarifies or simplifies a procedure.
The addition of this symbol to a Danger or Warning safety label indicates that an electrical hazard exists, which will result in personal injury if the instructions are not followed.
This is the safety alert symbol. It is used to alert you to potential personal injury hazards. Obey all safety messages that follow this symbol to avoid possible injury or death.
DANGER
DANGER indicates an imminently hazardous situation, which, if not avoided, will result in death or serious injury.
WARNING
WARNING indicates a potentially hazardous situation, which, if not avoided, can result in death, serious injury, or equipment damage.
CAUTION
CAUTION indicates a potentially hazardous situation, which, if not avoided, can result in injury or equipment damage.
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5
Safety Information
PLEASE NOTE 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.
© 2008 Schneider Electric. All Rights Reserved.
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33003974 06/2008
About the Book
At a Glance
Document Scope This document describes communication between automation systems and the
XBT N/R/RT product range using the Uni–Telway protocol.
Validity Note The data and illustrations found in this document are not binding. We reserve the right to modify our products in line with our policy of continuous product development. The information in this document is subject to change without notice and should not be construed as a commitment by Schneider Electric.
Related
Documents
Title of Documentation
XBT N/R/RT Instruction sheet
XBT N/R/RT User Manual
Reference Number
W916810140111 A08
33003962
Vijeo-Designer Lite
X-Way reference manual, UNI-TE protocol, coding, electro-magnetic compatibility
Online help
TSX DR NET
Product Related
Warnings
Schneider Electric assumes no responsibility for any errors that may appear in this document. If you have any suggestions for improvement 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 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 ensure compliance with documented system data, only the manufacturer should perform repairs to components.
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7
About the Book
Since the XBT N/R/RT terminals are not designed to pilot safety critical processes, no specific instructions apply in this context.
User Comments We welcome your comments about this document. You can reach us by e-mail at [email protected]
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Operating Principle
1
At a Glance
Overview This chapter describes the operating principle of XBT terminals in applications using the Uni-Telway protocol.
WARNING
LOSS OF CONTROL z z z z
The designer of any control scheme must consider the potential failure modes of control paths and, for certain critical 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 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.*
Each implementation of a Magelis XBT N/R/RT must be individually and thoroughly tested for proper operation before being placed into service.
Failure to follow these instructions can result in death, serious injury, or equipment damage.
*For additional information, refer to NEMA ICS 1.1 (latest edition), Safety Guidelines for the Application, Installation, and Maintenance of Solid State Control
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Operating Principle
What's in this
Chapter?
This chapter contains the following topics:
Topic
General
Operating Principle
Presentation of X-Way Addressing
Operating Principle of XBT Terminals Using the Uni-Telway Protocol
Page
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33003974 06/2008
Operating Principle
General
At a Glance
Illustration
Uni-Telway is a field bus used to communicate between devices of the same type according to a protocol defined by Schneider Electric.
Numerous proprietary or third-party devices can be used on this bus, which has become one of the industry standards.
The communication protocol terminology defines the software (driver) installed in the devices that are connected to the Uni-Telway bus.
This section gives a brief description of the principles of the communication bus.
The following illustration shows the position of the field buses in an industrial communication environment.
Function
Computer networks
Local industrial networks
Field bus
Sensor actuator bus
- Short messages
- Low response time
- Long messages
- Higher response time
Transmission needs
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11
Operating Principle
Architecture
Example
The following illustration shows a communication architecture, featuring a Uni-
Telway bus.
Unity Pro, PL7
Ethernet sub-network
Ethernet sub-network
Uni-Telway
Uni-Telway
Gateway
Uni-Telway
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Operating Principle
Operating Principle
At a Glance
Illustration
Communication between same-type devices can only take place by defining interconnection standards that define the behavior of each device in relation to the others. These standards were developed by ISO (the International Standard
Organization), which defined a standardized Network Architecture more commonly known as the OSI (Open System Interconnection) model.
This model is made up of seven ranked layers that each perform a specific part of the functions necessary for interconnecting systems.
The layers communicate with equivalent layers from other devices, via standardized protocols. Within a single device, layers communicate with their immediate neighbors via hardware or software interfaces.
The figure below describes the layers of the OSI model.
Device 1
Application
Presentation Information processing layers
Device 2
Session
Transport
Network
Link
Physical
Communication layers
Physical interconnection support
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Note: The Uni-Telway bus matches this model in terms of layers, without possessing all of them. Only the Application, Network, Link and Physical layers are necessary for this field bus.
13
Operating Principle
Application
Layer
The field bus’ application layer is the one visible by the programs of the interconnected devices. This is used to formulate the requests (reading/writing words and bits, identification, etc.) that will be sent to the remote device.
The Application layer used by the Uni-Telway bus is the UNI-TE application protocol.
Example : an XBT N/XBT R/XBT RT connected to a Uni-Telway bus will send UNI-
TE requests in order to update the graphic objects displayed on these pages.
The UNI-TE protocol is a CLIENT/SERVER protocol enabling each device of a Uni-
Telway bus to send or receive requests.
Request
CLIENT SERVER
Action
Report
Certain devices can support the double status of CLIENT and SERVER. For example, a PLC is SERVER for its system tasks, (programming functions, adjustment, diagnostics, etc.) and can be CLIENT to the user program code
(command sending, status reading, etc.) with regard to another PLC, to the digital control of tool machines, to a sensor or to a protector). In general, XBT N/XBT R/
XBT RTs have the status CLIENT to PLCs whose operation they visualize or control.
They have the status SERVER when they meet requests for identification, protocol version, detected error counters, etc.
Note: For further details on the UNI-TE application protocol, refer to the Schneider
Electric TSX DR NET documentation.
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Network Layer
Operating Principle
The network layer of the Uni-Telway bus is used to define and use the addresses of the devices that communicate between themselves. In the case of a Uni-Telway bus, this layer is the X-Way layer.
X-Way addressing is used to identify a device on a network or a bus. Each station of a network is identified by a unique address, made up of a network number and a station number. Addresses then differ according to the bus.
To identify the address system used by the XBT N / XBT R / XBT RT, refer to the section in this manual on configuring the Uni-Telway driver.
Note: For further details on X-Way addressing, refer to Presentation of X-Way
Addressing , p. 17 or Schneider Electric TSX DR NET documentation.
Link Layer The link layer of the Uni-Telway bus uses the Master/Slave communication principle.
The principle of a link layer is to define the low-level communication method for the communication medium (physical layer).
A Uni-Telway bus has one master device, the other devices of the bus are slaves
The master device can send directly a request or an answer to any slave.
Cyclically, the master device interrogates each slave. The interrogated slave can thus send a request or an answer to the master. If this request or answer is not for the master but for another slave device, the master forwards it to the right addressee.
Note: One reason for Master/Slave management is that at any time it is possible to calculate transfer time for requests and the answers from each device. This therefore enables us to size the buses precisely, in order that there be no saturation or information loss.
In general, the master device is a PLC. To find out the maximum number of slaves, refer to the documentation of the master you have chosen.
Note: Do not confuse the notions of CLIENT/SERVER and Master/Slave. These are not located on the same layers of the OSI model. There is only one master on the bus, but several CLIENTS and/or SERVERS), and a single device can be a
CLIENT one moment and a SERVER another.
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15
Operating Principle
Physical Layer The physical layer of the OSI model characterizes the topology of the communication bus or network, as well as the medium (cable, wire, fiber optic, etc.) that will transport the information and its electrical coding.
Within the framework of a Uni-Telway bus, topology may be daisy-chained, derived or a mix of both. The medium is made up of shielded twisted pairs, and the signal is a base band signal with a default speed of 9600 bit/s, odd parity, 8 data bits and 1 stop bit.
Note: In order for all devices to be able to communicate among themselves on the same Uni-Telway bus, the speed, parity and data bit number characteristics must be identical.
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Operating Principle
Presentation of X-Way Addressing
General Rules In a communication architecture, all exchanges generally take place as point-topoint exchanges between two logical entities (client and server). Each of these logical entities must be identified by a unique address. The address has two construction levels, described over the following pages.
Note: An XBT N / XBT R / XBT RT type operator dialog terminal, connected to a
Uni-Telway bus from a station in this communication architecture, is able to reach a device through the X-Way addressing, indicating the address of the objects to display or control.
Architecture
Level
A network architecture is made up of terminal stations and intermediate stations
(bridges) that link together 2 or more networks.
A station is identified by: z z a single network number in the architecture, a single station number in a network.
The intermediate stations connected to different networks therefore have several network addresses.
Illustration:
Terminal station Station i Address = R1S2
Station j
Intermediate station
Address = R1S1
Address = R2S2
Network 1
Station k Address = R1S3
Station l
Address = R2S1
Station m
Intermediate station
Address = R2S3
Address = R3S1
Intermediate station Station n Address = R3S2
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17
Operating Principle
Station Level This level is used to call an entity in the station.
A station connected to a network is made up of a set of communication entities located both in the station itself and in the devices connected to its internal communication channels (FIPIO bus, PLC backplane bus, Uni-Telway bus, etc.).
A communication entity is identified in its station by an address (module number, channel number in the module, connection point or slave address, etc.).
Examples:
Network 1
Station 1
Module 0
Channel 1
Station 2
Module 3
Channel 1
Module 1
Channel 15
Connection point 6
Connection point 22
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Operating Principle
Operating Principle of XBT Terminals Using the Uni-Telway Protocol
Status of XBT
Terminals in Uni-
Telway
Applications
The XBT terminal has the status of a CLIENT.
The XBT N410/401 and XBT R410/411 are slaves on the Uni-Telway network, unless they are connected to the programming port of a TSX 17 PLC via an
XBT Z958 cable.
The XBT occupies 2 consecutive addresses on the bus. CLIENT address = cabled address + 1; this is the address that the XBT uses to read and write variables in a device on its own initiative; this address is transparent for the other devices (it simply has to be reserved on the bus).
WARNING
UNINTENDED EQUIPMENT OPERATION
The protocol must be installed and used by authorized and properly trained personnel.
Failure to follow these instructions can result in death, serious injury, or equipment damage.
Roles of XBT
Terminals
XBT terminals perform the following functions: z monitoring function: XBT terminals visualize the processes that are active in the z
PLCs and indicate alarm states command function: XBT terminals send information to the PLC upon user request
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Operating Principle
20
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Software Configuration
2
At a Glance
Overview
What's in this
Chapter?
For Uni-Telway applications you do not have to configure protocol parameters because the communication parameters (transmission speed, parity etc.) are automatically detected. That is why this chapter only contains a dialog box for configuring equipment addresses.
This chapter contains the following topics:
Topic
Configuring the Address of the Terminal
Configuring Equipment Addresses
Uni-Telway Equipment Address Dialog Box
Page
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Software Configuration
Configuring the Address of the Terminal
Overview Use the Vijeo-Designer Lite software to configure the address of your XBT terminal.
WARNING
INCOMPATIBLE SOFTWARE
Use only Schneider Electric manufactured or approved software to program hardware.
Failure to follow these instructions can result in death, serious injury, or equipment damage.
Opening the
Protocol Specific
Dialog Box
To open the Protocol Specific dialog box in Vijeo-Designer Lite for configuring Uni-
Telway terminal address, proceed as follows:
Step
1
2
Action
Start Vijeo-Designer Lite.
From the application browser on the left-hand side of the Vijeo-Designer Lite window select the item Protocol-Unitelway .
Result : The Protocol Specific dialog box is displayed on the right-hand side of the Vijeo-Designer Lite window.
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Software Configuration
Configuring the
Address
Illustration of the Protocol Specific dialog:
Protocol Specific
Use Cable coded Address
Use following Address
XBT Base Address (Server)
Used Addresses are given by the cable
[1...
30]
Element
Use Cable coded Address
Use following Address
Used Addresses are ...
Description
The terminal uses the default address. In this case the XBT Base Address (Server) field is grayed out.
Depending on the cable used the address is:
RJ45
SUB-D25 forced to 4 cable coded (the XBT Base Address (Server) field is empty)
You can specify in the XBT Base Address (Server) field the address of the terminal.
The value must be between 1 and 30 and the default value is 4.
This text details the current configuration by indicating the server and client addresses used by the terminal.
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Software Configuration
Configuring Equipment Addresses
Overview Use the Vijeo-Designer Lite software to configure addresses for the equipment your
XBT terminal should communicate with.
WARNING
INCOMPATIBLE SOFTWARE
Use only Schneider Electric manufactured or approved software to program hardware.
Failure to follow these instructions can result in death, serious injury, or equipment damage.
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Software Configuration
Opening the
Equipment
Address Dialog
Box
Step
1
2
To open the Equipment Address dialog box in Vijeo-Designer Lite for configuring
Uni-Telway equipment addresses, proceed as follows:
Action
Start Vijeo-Designer Lite.
From the application browser on the left-hand side of the Vijeo-Designer Lite window select the item
Equipments .
Result : The following dialog box will be displayed on the right-hand side of the Vijeo-Designer Lite window.
Equipment
Name
MASTER
TSX57
QUANTUM
Address
[1]
[2]
[3]
Delete Add
Symbol Variables Files
Equipment Settings
Identification
Name
Address
MASTER
(0,254,0,254,0)
Communication
Double Word word order
ASCII Display byte order
High word first
High byte first
Common Settings
Protocol Advanced Settings
IEC61131
...
3
4
33003974 06/2008
In the Equipments dialog box select a slave device from the list.
In the Equipment Settings
→
Identification box below click the ...
button right to the Address text box.
Result : The dialog box Equipment Address will be displayed where you can configure an address for the selected Uni-Telway equipment.
25
Software Configuration
Uni-Telway Equipment Address Dialog Box
Purpose
Representation
Use this dialog box to configure the address of equipments connected to the network.
Uni-Telway equipment address
Equipment Address
Address
Network
Station
Gate
Selector
Connection Pt./Module
Reference/Channel
0
254
0
0
254
0
Frame Length
32 128
OK Cancel Help
The following elements configure the X-Way addressing for further details refer to
Presentation of X-Way Addressing , p. 17 :
Element
Address
Network
Station
Gate
Selector
Connection Pt./Module
Reference/Channel
Description
Define your Uni-Telway device with the following parameters.
Enter the network address (between 0 and 255).
Enter the station number (between 0 and 255).
Enter the gate number (between 0 and 255).
This parameter is not available.
Enter the number of the connection point or module
(between 0 and 255).
Enter a reference number or channel (between 0 and
255).
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Element
Frame Length
OK button
Cancel button
Help button
Software Configuration
Description
Choose a frame length to optimize communication.
z Select 32 to support a frame length of 32 bytes for connections to equipment that does not support z the maximum frame length (e.g. TSX17 PLCs).
Select 128 (default) to support the maximum possible frame length that is supported by the
PLCs.
Click the OK button to assign the entered address to the selected equipment.
Click the Cancel button to discard the changes and to close the dialog box.
Click the Help button to open the Vijeo-Designer Lite online help.
Note: For the parameter Frame Length select a value that is at least equal to the largest variable length expected. If the value of the parameter Frame Length is z z smaller than the variable length the following conditions will occur:
PLC read/write operations will fail question marks will be displayed on the XBT terminals instead of values
27
Software Configuration
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Variable Types Supported
3
Variable Types Supported
Table of Variable
Types Supported by the XBT
The following table lists all Uni-Telway variables XBT terminals can access.
Variable Type Supported
Word Bit
Internal Word
Internal Double Word
Floating Point
Syntax complying with IEC 61131-3 Standard
%MWi:Xj
Unity Premium: %MWi.j)
%MWi
%MDi
%MFi (IEEE754 standard) z z
Identifiers i : 0...65535
j : 0...15
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29
Variable Types Supported
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Cables and Connectors
4
At a Glance
Overview
What's in this
Chapter?
This chapter specifies the cables and connectors required for XBT terminals in Uni-
Telway applications.
This chapter contains the following topics:
Topic
Cables
SUB-D25 Pin Connections
RJ45 Pin Connections
Page
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Cables and Connectors
Cables
Overview The following table lists the cables required to connect the different XBT terminals to different Schneider PLCs using RS485 lines in Uni-Telway applications.
In Uni-Telway applications, when power is first applied to the XBT N terminals, the
XBT N terminals will issue noise on the bus for approximately 100 ms. This noise will disturb the communication of the equipment connected to the bus. Always apply power to the XBT N terminal first, before applying power to the master of the bus.
WARNING
UNINTENDED EQUIPMENT OPERATION
Always apply power to the XBT N terminal first, before applying power to the master of the bus.
Failure to follow these instructions can result in death, serious injury, or equipment damage.
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Cables and Connectors
Technical Data
Connected Device XBT Type
Programming port
TSX Modicon Nano,
XBT N200/N400*
XBT R400
Modicon TSX Micro
, Modicon Premium
XBT RT500/
XBT RT511
XBT N401/N410
XBT R410/R411
SCI plug
TSX 7 series 40
Programming port
TSX 17
TSX SCA62
TSX SCM21x6
TSX SCG116
Cable
Reference
XBT Z9780*
XBT Z9782*
Length
2.5 m (8.2 ft.)
10 m (32.8 ft.)
Comments point-to-point
XBT address = 4
XBT N401/N410
XBT R410/R411
XBT RT511
XBT N401/N410
XBT R410/R411
XBT RT511
XBT N401/N410
XBT R410/R411
XBT RT511
XBT N401/N410
XBT R410/R411
XBT RT500/
XBT RT511
XBT N401/N410
XBT R410/R411
XBT RT500/
XBT RT511
XBT Z968
XBT Z9680
XBT Z9681
XBT Z948**
XBT Z958**/
Z928**
XBT Z908**
XBT Z918**
XBT Z928**
2.5 m (8.2 ft.) straight
2.5 m (8.2 ft.) angled
5 m (16.4 ft.)
2.5 m (8.2 ft.)
2.5 m (8.2 ft.) point-to-point
XBT address = 1 accessory: TSX LES64 point-to-point
XBT address = 0***
2.5 m (8.2 ft.)
2.5 m (8.2 ft.)
2.5 m (8.2 ft.) multipoint
XBT address = 1...28**** point-to-point
XBT address = 1 point-to-point
XBT address = 1
* Depending on your hardware (for XBT N200/N400 display units), you may need to use a different cable if you have intermittent connections (see XBT Detected
** z z
XBT RT 511 : you must add a XBT ZG939 cable adapter (SUB-D25 <-> RJ45)
(+ XBT ZRTPW for XBT RT500.)
XBT RT 500 : you must add a XBT ZG939 cable adapter (SUB-D25 <-> RJ45) and a XBT ZRTPW for power supply.
*** In this case, the XBT is the master! In all other applications, it is a slave.
**** 1...28 devices
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33
Cables and Connectors
Special Case for the TSX 17
If the XBT is the master, the following rules have to be applied.
Change the address of the master device in the Vijeo-Designer Lite programming software.
Step Action
1 In the application browser of Vijeo-Designer Lite select Configuration
→
Equipments .
2
3
4
Use Modify...
or add a new device.
In the Equipment Address dialog box set the parameter Reference/Channel to the value 101 (see
Uni-Telway Equipment Address Dialog Box, p. 26 ).
Set the parameter Frame Length to the value 32 .
Configure the TSX 17 programming port in the PL7-2 17 programming software.
Step Action
1 In PL7-2 17 select the Configuration menu, then Application and Terminal .
2 For the parameter UTW Address enter the value 1 .
Note: For more detailed instructions, please refer to the PL7-2 Operating Mode documentation.
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Cables and Connectors
SUB-D25 Pin Connections
Overview
6
7
4
5
1
2
3
8
9
10
11
12
13
The following XBT terminals provide a SUB-D25 connector on their rear panels: z z z z
XBT N401
XBT N410
XBT R410
XBT R411
The SUB-D25 connector supports RS232 as well as RS485 lines. The pin assignment is shown in the following figure.
18
19
20
21
14
15
16
17
22
23
24
25
18
19
20
14
15
16
17
10
11
12
13
21
22
23
24
25
3
4
1
2
5
6
7
8
9
TXD
RXD
0
1
0V iso
COM
REG
CONF
B0
B1
B2
B3
B4
0V iso
PAR
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35
Cables and Connectors
Technical Data The illustration below shows the cabling for RS485 equipment.
RS485 link example
XBT terminal
Control system
Ex
Rx
(1)
(0V)
PG S G RXDRXD+
(2)
TXDTXD+
PG
(0V) S G
1
22
Line termination
Rx
TXD-
D0
4
TXD+
D1
5
+5V
Ex Rp Rp
RXD-
RXD+
0V
8
(2)
12
Ct
Rt
Legend
(1)
(2)
Connection of the shielding at both ends depends on any electrical restrictions affecting the installation.
Rt: Line impedance resistor (typically 110
Ω
). It is recommended to install the line impedance resistor with a RC circuit (R = 120
Ω
/0.25 W and C = 1 nF/10 V min).
Make sure that only one line impedance resistor is installed.
Note: RP resistors are integrated into the XBT and feature: z 4.7 k
Ω
for XBT N z 100 k
Ω
for XBT R
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Cables and Connectors
RJ45 Pin Connections
Overview
XBT N200/
XBT N400/
XBT R400
The following XBT terminals provide RJ45 connectors on their rear panels: z z z z z
XBT N200
XBT N400
XBT R400
XBT RT500
XBT RT511
These XBT terminals are equipped with different RJ45 connectors. Their individual pin assignments are listed in the following tables.
Pin assignment of the RJ45 connector on XBT N/R terminals
Representation Pin
RJ45 1
12345678
2
3
6
7
4
5
8
Signal
CONF
TxD
RXD
D1
D0
REG
+5 V
GND
Comments
Reserved
TXD RS232 signal
RXD RS232 signal
RS485 + signal
RS485 - signal
Reserved
Power supply: +5 V, I = 200 mA
Common non isolated
Note: Some XBT N200 or XBT N400 hardware types require different cables. If you have intermittent connections with these terminals, refer to
.
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37
Cables and Connectors
XBT RT500 Pin assignment of the RJ45 connector on XBT RT500 terminals
Representation Pin
RJ45 1
12345678 2
3
4
5
6
7
8
Signal
RXD
TxD
IN1
D1
D0
IN2
+5 V
GND
Comments
TXD RS232 signal
Input configuration signal
RS485 + signal
RS485 - signal
Input operating signal
Power supply: +5 V, I = 200 mA
Common non isolated
The illustration below shows the cabling for RS485 equipment.
RS485 link example
XBT RT500 terminal
Control system
Rx
Ex
PG RXDRXD+
(2)
TXDTXD+
(1)
PG 8
Line termination
TXD-
D0
Rx
TXD+
D1
+5V
Ex Rp Rp
RXD-
R XD+
0V
5
4
(2)
6
Ct
Rt
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Cables and Connectors
Legend
(1)
(2)
(3)
Connection of the shielding at both ends depends on any electrical restrictions affecting the installation.
If your control systems provides connectors for 4-wire connections, wire the RXD and TXD pins as shown in the above figure to form a 2-wire connection.
Rp: Polarization resistors: 4.7 k
Ω
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Cables and Connectors
XBT RT511 Pin assignment of the RJ45 connector on XBT RT511 terminals
Representation Pin
RJ45 1
12345678 2
3
4
5
6
7
8
Signal
RXD
TxD
IN1
D1
D0
IN2
-
0 V ISO
Comments
TXD RS232 signal
Input configuration signal
RS485 + signal
RS485 - signal
Input operating signal
-
0 V isolated
The illustration below shows the cabling for RS485 equipment.
RS485 link example
XBT RT511 terminal
Control system
Ex
Rx
(1)
(0V)
PG S G RXDRXD+
(2)
TXDTXD+
Line termination
(0V) S G 8
TXD-
D0
Rx
TXD+
D1
+5V
Ex Rp Rp
RXD-
R XD+
0V
5
4
(2)
Ct
Rt
6
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Cables and Connectors
Legend
(1)
(2)
(3)
Connection of the shielding at both ends depends on any electrical restrictions affecting the installation.
If your control systems provides connectors for 4-wire connections, wire the RXD and TXD pins as shown in the above figure to form a 2-wire connection.
Rp: Polarization resistors: 4.7 k
Ω
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Cables and Connectors
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Diagnostics
5
XBT Detected Error Indication
Overview XBT terminals indicate detected errors in different ways z z z z z z by displaying question marks ??????
in alphanumerical fields by displaying crosses for graphic objects by displaying hash characters in alphanumerical fields by blinking alphanumerical fields by issuing system error messages
Persistent display of the connection popup:
For XBT N200/N400 display units, persistent display of the popup indicating that the connection is in progress may be due to loss of communication.
The cable connecting the display unit to the PLC may be the reason for this.
If the Cable Used is an...
XBT Z978,
XBT Z9780,
Then...
use an XBT-Z9780 cable.
add an XBT ZN999 adaptor.
If the condition persists, update the Vijeo-Designer Lite with the most recent version available.
The following paragraphs list these detected errors and their possible reasons.
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Diagnostics
Question Marks and Crosses
When question marks ??????
and crosses XXXXXX are displayed on the display of your XBT terminal, a transmission error has occurred. To correct this, check the following:
If...
Then ...
question marks are displayed verify that all cables are correctly connected. question marks are displayed the XBT terminal may have received no response from the
PLC.
question marks are displayed the XBT terminal may have received an exception response from the PLC.
question marks are displayed check the value of the parameter Frame Length in the
Equipment Address dialog box (for more information refer to
Uni-Telway Equipment Address Dialog Box, p. 26
).
Hash Characters Hash characters displayed in alphanumerical fields on your XBT terminal indicate that the value to be displayed is too long for this alphanumerical field and cannot completely be displayed. The value 100 can, for example, not be displayed in a 2digit alphanumerical field. To correct this, enter a shorter value or adapt the size of the alphanumerical field so that it can display any of the possible values of the PLC variable.
Blinking
Alphanumerical
Fields
Blinking alphanumerical fields on your XBT terminal indicate that the value of this field has exceeded or fallen below a user-defined threshold.
System Error
Messages
A variety of system error messages is by default configured for the terminals. All these standard system messages are assigned a panel number 200+x. A distinction is made between system error messages indicating communication interruptions and status messages provoked by inputs at the terminal.
These 2 message types differ by the numbers they are assigned and by the way they are displayed at the terminal as shown in the list below:
System Error
Message Caused by:
Communication
Interruptions
System Error Message
Numbers
201– 204
Display Mode
Input at Terminal 241 – 258
To indicate that a communication interruption has occurred, the message is displayed in a popup dialog box every 10 seconds.
The status message is displayed as a response to user input at the terminal.
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Diagnostics
Messages
Caused by
Communication
Interruptions
Messages 201 to 204 are issued by the terminal to indicate that a communication interruption has occurred. They are displayed in a popup dialog every 10 seconds.
If...
message 201: DIALOG TABLE
AUTHORIZATION INCORRECT is displayed message 202: DIALOG TABLE
WRITING IMPOSSIBLE is displayed message 203: DIALOG TABLE
READING IMPOSSIBLE is displayed
Then ...
the authorization word in the dialog table does not have the expected value. (Refer to the Vijeo-
Designer Lite online help for information on how z z z this word is working.) To correct this, verify that:.
you are connected to the right PLC the memory of your PLC is not corrupted the correct value is saved on the PLC the write cycle of the PLC could not be ended. This condition may have the following causes: z z too much load on the communication bus
EMC disturbances on the communication bus
Check the value of the parameter Frame Length .
For more information refer to Uni-Telway
Equipment Address Dialog Box, p. 26 ). Use the
value ( 128 , except for connection with very specific PLCs like TSX17).
the read cycle of the PLC could not be ended. The values requested from the PLC cannot be retrieved from its dialog table. This condition may z z have the following causes: too much load on the communication bus
EMC disturbances on the communication bus
Check the value of the parameter Frame Length .
For more information refer to Uni-Telway
Equipment Address Dialog Box, p. 26 ). Use the
value ( 128 , except for connection with very specific PLCs like TSX17).
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Diagnostics
Messages
Caused by Input at the Terminal
Messages 242 to 254 are issued by the XBT as a response to user input at the terminal. These messages are displayed directly after the operator has sent an incorrect command to the terminal and will persist until the user has corrected the entered command or value. Messages 255 to 258 are status messages displayed after the user has initiated an operation at the terminal to indicate that it has (or has not) been accepted and is in progress.
If...
message 241: IMPOSSIBLE TO READ
VARIABLE is displayed
Then ...
the terminal has attempted to read a variable and could not retrieve its value. This condition may have the following causes: z too much load on the communication bus z EMC disturbances on the communication bus message 242: IMPOSSIBLE TO
WRITE VARIABLE is displayed messages 243 error message messages 251
to 249
250: LANGUAGE
IMPOSED BY PLC
or
is displayed
252
are displayed
are displayed the terminal has attempted to write in a memory area of the equipment and has received a negative acknowledgement or no z z acknowledgement at all. This condition may have the following causes: too much load on the communication bus
EMC disturbances on the communication bus correct the value or command you have entered as indicated by the message.
the PLC forces the terminal to use a language.
This language cannot be changed by the operator.
For more information see the Vijeo-Designer Lite online help, functions of the dialog table.
correct the value or command you have entered as indicated by the error message.
message 253: PASSWORD IMPOSED
BY PLC is displayed message
PAGE
254: PROTECTED ACCESS
is displayed messages 255 to 258 are displayed you cannot change the password at the terminal because it is forced by the PLC. For more information see the Vijeo-Designer Lite online help, functions of the dialog table.
you are trying to access a page that is password protected but you do not have the required authorization level.
the commands you entered at the terminal are executed or not executed, as indicated in these status messages.
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Diagnosis
Counters
Diagnostics
4 diagnosis counters can be displayed on the protocol’s system page (line parameters):
Counter Meaning
1
2
3
4 number of emitted messages that were not acknowledged (no response at all or undefined response)
Explanation
Possible reasons: z The PLC may have not received the request (due to cabling problems).
z The PLC may not be able to process the request (due to incoherent communication parameters between XBT terminal and PLC).
number of emitted messages that were refused
The PLC has received the request but is too busy to answer it (due to cabling problems).
Possible reason: z z too much equipment connected too many requests from the XBT terminal (optimize the pages so that the variables are contiguous or reduce the size and the speed of the dialog table by reducing the number of requests number of received messages that were not acknowledged (no response at all) number of received messages that were refused (no response at all)
This counter will remain at 0 in normal operation. It will only be increased if the
XBT terminal receives wrong requests on its server channel (due to incoherent communication parameters between
XBT terminal and PLC).
This counter will remain at 0 in normal operation. It will only be increased if the
XBT terminal receives too much diagnose requests.
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Diagnostics
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Appendices
At a Glance
Overview
What's in this
Appendix?
This chapter contains some RS485 recommendations.
The appendix contains the following chapters:
Chapter
A
Chapter Name
RS485 Recommendations
Page
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Appendices
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RS485 Recommendations
A
RS485 Recommendations
Diagrams for
RS485 Link
RS485 link
Distance
1,200m
(3,937 ft.)
Speed
10 M (bit/s) 1 K 100 K z z
Maximum length for the link is 1,200 m (3,937 ft.).
Wiring = 2 shielded twisted wires with a minimum cross-section of 0.6 mm
2
(AWG22) and one 0 V wire
Note: The maximum length including the RS485 link is 1,200 m (3,937 ft.), provided that the equipment connected to the XBT terminal is not subject to more stringent restrictions (refer to connected devices instruction sheet) and for XBT
N200, XBT N400, XBT R400 and XBT RT500 provided that the length of the cable is below 10 m (32.8 ft.) (because power is also supplied by this cable).
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RS485 Recommendations
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Glossary
P
PLC
R
RS485
A
AWG
M
Magelis
American wire gauge (wire diameter)
Generic commercial name of the range of Schneider HMI terminals.
programmable logic controller recommended standard for connecting serial devices = EIA/TIA 485
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Glossary
V
Vijeo-Designer
Lite
Configuration software for the low end Magelis range. It replaces the XBT-L1000 software.
X
XBT Any HMI terminal (when it is not necessary to make a distinction).
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Index
A
address
configuring equipment address, 24
C
cables
D
data types
diagnostics
E
O
objects
operating principles
33003974 06/2008
P
pin connections
R
RJ45
RS485
S
SUB-D25
U
Uni-Telway protocol
V
variable types
A C
55
Index
X
X-WAY addressing
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Key features
Describes Uni-Telway protocol implementation for XBT N/R/RT terminals
Provides software configuration details for Uni-Telway communication.
Outlines cable and connector specifications for RS485 connections.
Includes diagnostic information for troubleshooting connection issues.
Details X-Way addressing for network communication on the Uni-Telway bus.
Frequently asked questions
Uni-Telway is a field bus used to communicate between devices of the same type according to a protocol defined by Schneider Electric.
XBT terminals act as clients, monitoring processes in PLCs, indicating alarms, and sending information to the PLC upon user request.
XBT terminals can access Word Bit (%MWi:Xj), Internal Word (%MWi), Internal Double Word (%MDi), and Floating Point (%MFi) variables.