HMS Anybus Communicator for Modbus RTU User manual

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User Manual
Anybus®Communicator™ for Modbus RTU
Rev. 2.53

Preface About This Document
How To Use This Document ............................................................................................................ P-1
Important User Information .............................................................................................................. P-1
Related Documents.............................................................................................................................. P-2
Document History ............................................................................................................................... P-2
Conventions & Terminology.............................................................................................................. P-3
Glossary ................................................................................................................................................. P-3
Support .................................................................................................................................................. P-4
Chapter 1 About the Anybus Communicator for Modbus-RTU
External View ........................................................................................................................................1-2
Status LEDs ...........................................................................................................................................1-3
Configuration Switches ........................................................................................................................1-4
Node Address...............................................................................................................................1-4
Baudrate Configuration.................................................................................................................1-4
Parity & Stop Bits.......................................................................................................................1-4
Physical Interface...........................................................................................................................1-4
Hardware Installation ...........................................................................................................................1-5
Software Installation .............................................................................................................................1-6
ABC Config Tool.........................................................................................................................1-6
Chapter 2 Basic Operation
General....................................................................................................................................................2-1
Data Exchange Model ..........................................................................................................................2-2
Memory Map................................................................................................................................2-2
Data Exchange Example.............................................................................................................2-3
Sub-Network Protocol .........................................................................................................................2-4
Protocol Modes..............................................................................................................................2-4
Protocol Building Blocks ...............................................................................................................2-4
Master Mode ................................................................................................................................2-5
Generic Data Mode ......................................................................................................................2-5
Data Representation on Modbus RTU..............................................................................................2-6
General.........................................................................................................................................2-6
Supported Function Codes.............................................................................................................2-6
Coil & Register Map ...................................................................................................................2-6
Supported Exception Codes...........................................................................................................2-6
Chapter 3 Navigating the ABC Config Tool
Main Window ........................................................................................................................................3-1
Pull-down Menu ...........................................................................................................................3-2
Toolbar Icons ................................................................................................................................3-5
Table of Contents
Table of Contents

Table of Contents 3
Chapter 4 Basic Settings
Fieldbus Settings....................................................................................................................................4-6
ABC Parameters ....................................................................................................................................4-7
Sub-Network Parameters .....................................................................................................................4-1
Chapter 5 Nodes
General....................................................................................................................................................5-1
Adding & Managing Nodes.................................................................................................................5-1
Node Parameters...................................................................................................................................5-1
Chapter 6 Transactions
General....................................................................................................................................................6-1
Adding & Managing Transactions ......................................................................................................6-1
Transaction Parameters (Master Mode).............................................................................................6-2
Parameters (Query & Broadcast)..................................................................................................6-2
Parameters (Response)...................................................................................................................6-3
Transaction Parameters (Generic Data Mode).................................................................................6-3
Produce-Transactions ....................................................................................................................6-3
Consume-Transactions ..................................................................................................................6-4
Transaction Editor ................................................................................................................................6-5
Chapter 7 Frame Objects
General....................................................................................................................................................7-1
Adding and Editing Frame Objects ...................................................................................................7-1
Constant Objects (Byte, Word, Dword)............................................................................................7-2
Limit Objects (Byte, Word, Dword) ..................................................................................................7-3
Data Object ............................................................................................................................................7-4
Variable Data Object ............................................................................................................................7-4
Checksum Object ..................................................................................................................................7-6
Chapter 8 Commands
General....................................................................................................................................................8-1
Adding & Managing Commands ........................................................................................................8-1
Pull-Down Menu..........................................................................................................................8-2
Toolbar Icons ................................................................................................................................8-2
The Command Editor ..........................................................................................................................8-3
General.........................................................................................................................................8-3
Basic Navigation ..........................................................................................................................8-3
Pull-down Menu ...........................................................................................................................8-4
Editing a Command .....................................................................................................................8-5
Example: Specifying a Modbus-RTU Command in Master Mode ................................................8-6

Table of Contents 4
Chapter 9 Sub Network Monitor
Chapter 10 Node Monitor
General..................................................................................................................................................10-1
Navigating the Node Monitor...........................................................................................................10-2
Pull-Down Menu........................................................................................................................10-3
Toolbar Icons ..............................................................................................................................10-4
Chapter 11 Data Logger
General..................................................................................................................................................11-1
Operation..............................................................................................................................................11-1
Configuration .......................................................................................................................................11-2
Chapter 12 Configuration Wizards
General..................................................................................................................................................12-1
Selecting a Wizard Profile ..................................................................................................................12-1
Wizard - Modbus RTU Master .........................................................................................................12-2
Chapter 13 Control and Status Registers
General..................................................................................................................................................13-1
Handshaking Procedure ..............................................................................................................13-1
Data Consistency ........................................................................................................................13-2
Status Register Contents (Gateway to Control System)................................................................13-3
General Information....................................................................................................................13-3
Status Codes in Master Mode .....................................................................................................13-3
Status Code in Generic Data Mode ............................................................................................13-4
Control Register Contents (Control System to Gateway).............................................................13-5
General Information....................................................................................................................13-5
Control Codes in Master Mode ...................................................................................................13-5
Control Codes in Generic Data Mode .........................................................................................13-5
Chapter 14 Advanced Fieldbus Configuration
General..................................................................................................................................................14-1
Mailbox Editor.....................................................................................................................................14-1
Appendix A Connector Pin Assignments
Fieldbus Connector (Modbus-RTU).................................................................................................A-1
Power Connector .................................................................................................................................A-1
PC Connector .......................................................................................................................................A-2

Table of Contents 5
Sub-network Interface.........................................................................................................................A-3
General Information.....................................................................................................................A-3
Bias Resistors (RS485 Only)....................................................................................................... A-3
Termination (RS485 & RS422 Only) ....................................................................................... A-3
Connector Pinout (DB9F) ...........................................................................................................A-3
Typical Connection (RS485)........................................................................................................A-4
Typical Connection (RS422 & 4-Wire RS485) .........................................................................A-4
Typical Connection (RS232)........................................................................................................A-4
................................................................................................................................................................. A-5
Appendix B Technical Specification
Mechanical Properties.......................................................................................................................... B-1
Electrical Characteristics ..................................................................................................................... B-1
Environmental Characteristics ........................................................................................................... B-1
Regulatory Compliance ....................................................................................................................... B-2
Appendix C Troubleshooting
Appendix D ASCII Table

Preface
About This Document
How To Use This Document
This document contains a general introduction as well as a description of the technical features pro-
vided by the Anybus Communicator, including the PC-based configuration software.
The reader of this document is expected to be familiar with PLC and software design, as well commu-
nication systems in general. The reader is also expected to be familiar with the Microsoft Windows op-
erating system.
Important User Information
The data and illustrations found in this document are not binding. We, HMS Industrial Networks AB,
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 considered as a com-
mitment by HMS Industrial Networks AB. HMS Industrial Networks AB assumes no responsibility for
any errors that may appear in this document.
There are many applications of this product. Those responsible for the use of this device must ensure
that all the necessary steps have been taken to verify that the application meets all performance and safe-
ty requirements including any applicable laws, regulations, codes, and standards.
Anybus® is a registered trademark of HMS Industrial Networks AB. All other trademarks are the prop-
erty of their respective holders.
The examples and illustrations in this document are included solely for illustrative purposes. Because of
the many variables and requirements associated with any particular implementation, HMS cannot as-
sume responsibility or liability for actual use based on these examples and illustrations.
Warning: This is a class A product. In a domestic environment this product may cause radio interfer-
ence in which case the user may be required to take adequate measures.
ESD Note: This product contains ESD (Electrostatic Discharge) sensitive parts that may be damaged
if ESD control procedures are not followed. Static control precautions are required when
handling the product. Failure to observe this may cause damage to the product.

About This Document P-2
Related Documents
Document History
Summary of Recent Changes (2.52... 2.53)
Revision List
Document name Author
ABC-RTU Installation Leaflet HMS
Change Page(s)
Corrected switch information (‘Physical Interface’) 1-4
Misc. corrections and adjustments -
Revision Date Author Chapter Description
2.00 2005-08-25 PeP All Second major release
2.50 2006-04-05 PeP All Major update
2.51 2006-06-01 PeP - Minor corrections
2.52 2006-12-22 PeP - Minor corrections
2.53 2007-11-23 PeP All Minor updates

About This Document P-3
Conventions & Terminology
The following conventions are used throughout this document:
• Numbered lists provide sequential steps
• Bulleted lists provide information, not procedural steps
• The term ‘user’ refers to the person or persons responsible for installing the Anybus Communi-
cator in a network.
• The term ‘gateway’ refers to the Anybus Communicator.
• Hexadecimal values are written in the format 0xNNNN, where NNNN is the hexadecimal value.
• Decimal values are represented as NNNN where NNNN is the decimal value
• As in all communication systems, the terms “input” and “output” can be ambiguous, because
their meaning depend on which end of the link is being referenced. The convention in this doc-
ument is that “input” and “output” are always being referenced to the master/scanner end of the
link.
Glossary
Term Meaning
ABC Anybus®Communicator™
Broadcaster A protocol-specific node in the configuration that handles transactions destined to all nodes.
RTU Modbus RTU
Command A pre-defined transaction.
Configuration List of configured nodes with transactions on the sub-network.
Fieldbus The higher level network to which the communicator is connected.
Fieldbus Control System Fieldbus master
Frame Object Low level entities which are used to describe the different parts of a Transaction.
Monitor A tool for debugging the gateway and the network connections.
Node A device in the configuration which defines the communication with a node on the sub-network
Sub-network The network that is logically located on a subsidiary level with respect to the fieldbus, and to
which the Anybus Communicator acts as a gateway.
Transaction A generic building block that is used in the sub-network configuration and defines the data that
is sent and received on the sub-network.
User Person or persons responsible for installing the Anybus Communicator
Higher Level Network In this case, Modbus RTU
Network
Fieldbus

About This Document P-4
Support
For technical support consult the online FAQ (www.anybus.com), or contact the nearest support centre:
HMS Sweden (Head Office)
E-mail: [email protected]
Phone: +46 (0) 35 - 17 29 20
Fax: +46 (0) 35 - 17 29 09
Online: www.anybus.com
HMS America
E-mail: [email protected]
Phone: [phone]
Toll Free: 888-8-Anybus
Fax: [phone]
Online: www.anybus.com
HMS Germany
E-mail: [email protected]
Phone: [phone]
Fax: [phone]
Online: www.anybus.com
HMS Japan
E-mail: [email protected]
Phone: [phone]
Fax: [phone]
Online: www.anybus.com