Schneider Electric XBTN/R, AB DF1 Protocol User Guide
Schneider Electric XBTN/R, AB DF1 Protocol is a device used for communication between automation systems and the XBT N/R/RT product range. It enables communication with Allen Bradley process controllers such as SLC-500, Micrologix 1000, Micrologix 1200, and Micrologix 1500. The device acts as a master in DF1 applications, allowing it to initiate communication and send requests to the slave devices (PLCs). It supports various variable types, making it suitable for a wide range of industrial automation applications.
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Schneider Electric
AB DF1 Protocol
XBT N/R/RT
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Table of Contents
Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
About the Book . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Chapter 1
Compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Chapter 2
Operating Principle. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
General Information on Bus Communications. . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Communication of XBT Terminals with Allen Bradley PLCs . . . . . . . . . . . . . . . . 16
Chapter 3
Software Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Chapter 4
Variable Types Supported . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Chapter 5
Cables and Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Chapter 6
Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Appendices
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Appendix A
RS232/RS485 Recommendations . . . . . . . . . . . . . . . . . . . . . . . 41
Glossary
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Index
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
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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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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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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 AB DF1 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
Vijeo-Designer Lite
Reference Number
W916810140111 A08
33003962
Online help
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About the Book
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.
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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Compatibility
1
Compatibility
Overview
z z z z
The DF1 protocol available for XBT terminals can be used to communicate with the following Allen Bradley process controllers:
SLC-500
Micrologix 1000
Micrologix 1200
Micrologix 1500
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Compatibility
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Operating Principle
2
At a Glance
Overview
This chapter describes the operating principle of XBT terminals in applications using the AB DF1 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 Information on Bus Communications
Master / Slave Communication Principle
Communication of XBT Terminals with Allen Bradley PLCs
Page
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Operating Principle
General Information on Bus Communications
Overview
Roles of XBT
Terminals
The XBT terminals can be connected to PLCs using different protocols. This document describes the communication using the DF1 protocol with the XBT terminal acting as master.
The terminals are usually connected to a communication equipment (PLC or other) via a field bus. The XBT and the PLCs work autonomously of each other.
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
Roles of Buses
Roles of
Protocols
A bus system provides the possibility to connect different devices via a unique cabling.
The protocol defines the language that is used by all the equipment connected to the bus.
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Operating Principle
Master / Slave Communication Principle
Overview
Characteristics of the Master /
Slave Principle
DF1 communications are performed according to the master / slave principle that is described in the following.
The master / slave principle is characterized as follows: z z z z z z z
Only one master is connected to the bus at a time.
One or several slaves can be connected to the same serial bus.
Only the master is allowed to initiate communication, i.e. to send requests to the slaves.
In DF1 communications, the master can only initiate one DF1 transaction at the same time.
The slaves can only answer requests they received from the master.
The slaves are not allowed to initiate communication, neither to the master nor to any other slave.
In DF1 communications, the slaves generate an error message and send it as response to the master if an error occurred in receipt of the message or if the slave is unable to perform the requested action.
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Operating Principle
Terminals acting as Master in DF1
Applications
In DF1 applications, the XBT terminal acts as master, whereas the PLCs act as slaves.
Master / Slave communication
XBT RT511
Master
1
5
6
Re qu es t
Adr. 1
Re sp on se
Adr. 2 Adr. 3
7
2 3
1
XBT RT511
2
SLC–500 / Micrologix
3
SLC–500 / Micrologix
4
SLC–500 / Micrologix
5
DF1 bus
6
Slaves cannot initiate the communication
7
Slaves cannot communicate with other slaves
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Operating Principle
Communication of XBT Terminals with Allen Bradley PLCs
Overview
The XBT terminal is master.
The DF1 protocol is the communication protocol for Allen Bradley process controllers.
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.
Depending on the type of process controllers in the range, the dialog will be supported by different types of frames:
Type of Frame
specific z
SLC-500 or z
Micrologix 1000 / Micrologix 1200 /
Micrologix 1500
"BASIC COMMAND SET" generic frames
Comment
If only SLC-500 or Micrologix 1000 /
Micrologix 1200 / Micrologix 1500 process controllers communicate with the XBT terminal.
If different types of equipment such as SLC-
500, Micrologix 1000 / Micrologix 1200 /
Micrologix 1500 communicate with the XBT terminal.
Certain restrictions will apply to the access to the process controller data depending
on the type of frame selected (see Variable Types Supported, p. 27).
The dialog between the XBT terminal as master (requester of the exchange), and the equipment as slaves is of question/reply type.
Half/Full Duplex
Link
The terminal automatically detects whether the link is of half duplex or full duplex type.
The XBT can be connected in point-to-point mode, or the network of 254 possible
PLCs can be used via the polling system. This characteristic is transparent to the user and the XBT functions remain the same except for addressing which in the case of a point-to-point link is limited to the directly connected process controller.
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Operating Principle
Automatic
Detection of Full
Duplex
Note: It is important to note that the XBT should be connected to the network before turning on the power supply.
The polling detection mechanism is switched on when the XBT is powered on and switches off after about 30 s. This is why if the XBT is connected to the network when the mechanism is switched off, the controller will be automatically considered to be configured in Full Duplex and the XBT will behave as such.
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Operating Principle
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Software Configuration
3
At a Glance
Overview
What's in this
Chapter?
This chapter contains the protocol parameters you must configure in the Vijeo-
Designer Lite software for operating XBT terminals in applications using the DF1 protocol.
This chapter contains the following topics:
Topic
Vijeo-Designer Lite
Protocol - AB DF1 Dialog Box
Configuring Equipment Addresses
DF1 Equipment Address Dialog Box
Page
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Software Configuration
Vijeo-Designer Lite
Overview
Use the Vijeo-Designer Lite software to configure your XBT terminal for DF1 protocol applications.
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
Protocol - AB
DF1 Dialog Box
Step
1
2
To open the Protocol - AB DF1 dialog box in Vijeo-Designer Lite for setting the protocol parameters, proceed as follows:
Action
Start Vijeo-Designer Lite.
To create a new application, continue with step 2, if you have already created a DF1 application, skip steps 2 and 3 and execute step 4.
From the application browser on the left-hand side of the Vijeo-Designer Lite window select the item
Configuration
→ Terminal & Protocol.
Result: The following dialog box will be displayed on the right-hand side of the Vijeo-Designer Lite window.
Terminal & Protocol
Hardware
Resolution
Screen Color
Back-light Color
Peripherals
10 Lines 33 Columns
Black and White
Green
Touch Screen
Software
Scrolling
Alarm
Yes
No
Yes
3
4
Terminal Type
XBT-RT500
Terminal Protocol
AB DF1
Apply Cancel
From the Terminal Protocol list in the lower right corner select the item AB DF1 and click Apply.
Select from the application browser the item Protocol - AB DF1.
Result: The dialog box Protocol - AB DF1 will be displayed on the right-hand side of the Vijeo-Designer
Lite window where you can configure the protocol parameters for DF1 communication.
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Software Configuration
Protocol - AB DF1 Dialog Box
Purpose
Representation
Use this dialog box to configure the protocol parameters for DF1 communication.
Protocol - AB DF1
Communication
Transmission Speed
Parity Bit
Data Length
Stop Bits
8
1
19200
Even
Protocol Specific
End Block Checking
Number of Retry on Error
Number of Acknowledgement
Requirement
Station Number
Equipment Type
CRC
2
Default
3
3
[1...255]
[1...255]
[1...254]
Elements of the dialog box
Element
Communication
Transmission Speed
Parity Bit
Description
Select the transmission speed (in bit/s) on your DF1 bus from the list. Make sure to configure the same transmission speed for all devices connected to the bus.
Select either even, odd or no parity. Make sure to configure the same parity value for all devices connected to the bus.
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Element
Data Length
Stop Bits
Protocol Specific
End Block Checking
Number of Retry on Error
Number of Acknowledgement
Requirement
Station Number
Equipment Type
Software Configuration
Description
You cannot edit this parameter because in DF1 communications the length of user data is always 8 bits.
You cannot edit this parameter because in DF1 communications always 1 stop bit is used.
Select the detected error checking method (BBC or
CRC) that should be executed.
z
Select BCC (Block Check Character) for rapid, 8z bit format detected error checking.
Select CRC (Cyclic Redundancy Checking) for less rapid but more reliable, 16-bit format detected error checking.
Enter the number of times the XBT terminal should resend a message to an equipment after it received a negative response from it.
Enter the number of times the XBT terminal should request an acknowledgement from the equipment after a receive time out has been exceeded.
Enter the unique address (between 1 and 254) of the
XBT terminal in the network.
Select the type of Allen Bradley PLC that should be addressed by the XBT terminal. If the XBT terminal should address different types of Allen Bradley PLCs, select the value Default.
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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.
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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
AB DF1 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
(1)
Communication
Double Word word order
ASCII Display byte order
High word first
High byte first
Common Settings
Protocol Advanced Settings
...
3
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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 equipment.
25
Software Configuration
DF1 Equipment Address Dialog Box
Purpose
Representation
Use this dialog box to configure the address of equipments connected to the network.
DF1 equipment address
Equipment Address
Address
CPU Number
26
Frame Length
256
Bytes
OK Cancel Help
Elements of the dialog
Element
CPU Number
Frame Length
OK button
Cancel button
Help button
Description
Enter the CPU number (between 1 and 254) for the selected equipment.
Enter a value for the length of the frame (in bytes)
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 z z largest variable length expected. If the value of the parameter Frame Length is smaller than the variable length the following errors will occur:
PLC read/write operations will fail question marks will be displayed on the XBT terminals instead of values
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Variable Types Supported
4
Variable Types Supported
Table of Variable
Types Supported by the XBT
The following table lists all DF1 variables XBT terminals can access.
Variable Type Supported
Bit
Word
Double Word
Floating
String
DF1 Syntax
Nf:i/j
Nf:i
= word
Ff:i
= word z z
Identifiers f : 7...255
i : 0...255
z j : 0...15
File Number f
Indicates the number of the file in the process controller that the operator wishes to access.
Depending on the choice of process controller type, the possible file number will be:
Process Controller Type
Default (Basic Command Set)
PLC-5
SLC-500 z z z
Micrologix 1000
Micrologix 1200
Micrologix 1500
File Number
z z for an SLC-500 use 9 for a PLC-5 this number corresponds to the transmitter’s network address between 9 and 255 between 9 and 255
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Variable Types Supported
Index i
Indicates the item number in the selected file.
Note: If you use the Basic Command Set this item number may be interpreted differently according to the type of process controller. For further information refer to your process controller's technical documentation.
Index j
It will only be possible to access this field if the selected data type is Nf:i/j.
It indicates the bit's row in the word (selected by means of the i field).
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Cables and Connectors
5
At a Glance
Overview
What's in this
Chapter?
This chapter specifies the cables and connectors required for XBT terminals in DF1 applications.
This chapter contains the following topics:
Topic
Cables
SUB-D 25 Pin Connections
Page
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Cables and Connectors
Cables
Technical Data
The following table lists the cables required to connect XBT terminals to the different
Allen Bradley devices.
Cable Reference Length and Type Connected Device XBT Type
SLC–5 XBT N401/N410
XBT R410/R411
XBT RT500/RT511
Micrologix XBT N401/N410
XBT R410/R411
XBT RT500/RT511
XBT Z9731
XBT Z9733**
(SUB-D25 <--> SUB-D9)
2.5 m (98.45 in.)
(SUB-D25 <--> Micrologix 1000)
2.5 m (98.45 in.)
(RJ45 <--> Micrologix 1000)
* z z
XBT RT 511: you must add a XBT ZG939 cable adapter (SUB-D25 <-> RJ45)
XBT RT 500: you must add a XBT ZG939 cable adapter (SUB-D25 <-> RJ45) and a XBT ZRTPW for power supply.
** XBT RT 500: you must add a XBT ZG939 cable adapter for power supply.
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Cables and Connectors
SUB-D 25 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 lines for connections to Allen Bradley
PLCs. 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
IN2
IN1
B0
B1
B2
B3
B4
0V iso
PAR
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Cables and Connectors
Connection to
Micrologix 1000,
1200 and 1500 via XBT Z9731
The illustration below shows the cabling for Micrologix 1000, 1200 and 1500 using cable XBT Z9731.
XBT Terminal PLC DF1 coupler
Connection to
SLC–500 via
XBT Z9730
(*) Connection of the shielding at both ends depends on any electrical restrictions affecting the installation.
The illustration below shows the cabling for SLC–500 using cable XBT Z9730.
XBT Terminal PLC DF1 coupler
32
(*) Connection of the shielding at both ends depends on any electrical restrictions affecting the installation.
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Diagnostics
6
XBT Detected Error Indication
Overview
XBT terminals indicate detected errors in different ways 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
The following paragraphs list these three detected errors and their possible reasons.
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 verify that the communication parameters set in the
Protocol - AB DF1 dialog box are identical for all equipment connected to the bus i.e. same transmission speed, same use of parity.
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.
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Diagnostics
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 problem, 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 problem 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 to the dialog table of the PLC could z z not be ended. This condition may have the following causes: too much load on the communication bus
EMC disturbances on the communication bus the read cycle from the dialog table of the PLC could not be ended. This condition may have the following causes: z too much load on the communication bus z EMC disturbances on the communication bus
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Diagnostics
Messages
Caused by Input at the Terminal
Messages 242 to 254 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...
Then ...
message 241: IMPOSSIBLE TO READ
VARIABLE
is displayed the terminal has attempted to read a variable and could not retrieve its value. This condition may z z have the following causes: too much load on the communication bus
EMC disturbances on the communication bus message 242: IMPOSSIBLE TO
WRITE VARIABLE
is displayed messages 243 to 249 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.
message 250: LANGUAGE IMPOSED
BY PLC
is displayed messages 251 or 252 are displayed 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.
message 253: PASSWORD IMPOSED
BY PLC
is displayed message 254: PROTECTED ACCESS
PAGE
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
3 diagnosis counters can be displayed on the protocol’s system page (line parameters):
Number
1
2
3
Meaning
number of responses received without any FCS error number of responses received with any FCS error number of requests that have not been answered
Note: The counters no. 4...8 are not used and remain at 0.
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Diagnostics
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Appendices
At a Glance
Overview
What's in this
Appendix?
This chapter contains some RS232 and RS485 recommendations.
The appendix contains the following chapters:
Chapter
A
Chapter Name
RS232/RS485 Recommendations
Page
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Appendices
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RS232/RS485 Recommendations
A
At a Glance
Overview
What's in this
Chapter?
This chapter decribes the RS232/RS485 recommendations.
This chapter contains the following topics:
Topic
RS232 Recommendations
RS485 Recommendations
Page
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41
RS232/RS485 Recommendations
RS232 Recommendations
Diagrams for
RS232C Link
RS232C link
Distance
RS232 C
100 m (328.1 ft.)
15 m (49.2 ft.)
Speed
100 1 K 10 K 19,2 K
(bit/s) z z
Maximum length for the link is 15 m (49.2 ft.).
Wiring = 3 shielded wires with a minimum cross-section of 0.6 mm
2
(AWG22)
Note: The maximum length including the RS232 link is 15 m (49.21 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 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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RS232/RS485 Recommendations
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 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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RS232/RS485 Recommendations
44
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Glossary
M
Magelis
P
PLC
A
AWG
F
FCS
American wire gauge (wire diameter) frame check sequence
Generic commercial name of the range of Schneider HMI terminals.
programmable logic controller
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45
Glossary
R
RS232
RS422
X
XBT
recommended standard for connecting serial devices = EIA/TIA 232 recommended standard for connecting serial devices = EIA/TIA 422
V
Vijeo-Designer
Lite
Configuration software for the low end Magelis range. It replaces the XBT-L1000 software.
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
communication principle
compatibility
configuration
D
DF1 protocol
diagnostics
E
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A
C
M
master / slave communication principle, 14
O
operating principles
P
pin connections
R
RS232
RS485
S
SUB-D25
V
variable types
47
Index
48
33003998 06/2008
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