HMS AnyBus-X J1939 User manual

AnyBus-X
J1939 to Modbus Interface
User Manual
Doc. id: SCM-7801-026
revision 1.12
HMS Industrial Networks
www.hms-networks.com

Table of Contents i
© 2002 HMS Industrial Networks Document Id: SCM-7801-026
Table of Contents
Preface.........................................................................iii
About This Manual................................................iii
Important User Information...................................iii
Related Documentation.......................................... iv
Document Revision................................................ iv
AnyBus-X Module Description...............................1-1
Overview .................................................................... 1-1
Theory of Operation ................................................... 1-2
J1939 Features .......................................................... 1-3
Modbus Features ....................................................... 1-3
System Requirements................................................ 1-4
Hardware Description................................................. 1-5
Installation................................................................ 2-1
Power and Network Connector.................................. 2-1
Configuration Port Connector..................................... 2-3
Configuration ........................................................... 3-1
AnyBus-X Configuration Tool (BWConfig) ................. 3-1
Modbus Network Configuration.................................. 3-6
J1939 Network Configuration..................................... 3-7
J1939 I/O Configuration ............................................. 3-9
Example Application ............................................... 4-1
Scenario..................................................................... 4-1
Modbus Network Configuration.................................. 4-2
J1939 Network Configuration..................................... 4-2
J1939 I/O Configuration ............................................. 4-3
Modbus Interface..................................................... 5-1
Network Communication............................................ 5-1
Supported Modbus Functions .................................... 5-2
Diagnostic Subfunctions............................................. 5-3
Modbus Addressing ................................................... 5-7
Diagnostic Registers .................................................. 5-9

Table of Contents ii
© 2002 HMS Industrial Networks Document Id: SCM-7801-026
Interaction with I/O Tables ....................................... 5-10
J1939 Interface......................................................... 6-1
Address Management................................................ 6-1
Communications Methods.......................................... 6-2
Message Transmission.............................................. 6-3
Receiving Messages.................................................. 6-5
Transport Protocol for Large Messages..................... 6-6
Bus-Off Reset Option................................................. 6-7
Status and Diagnostics............................................. 7-1
AnyBus-X LEDs ......................................................... 7-1
Status Codes.............................................................. 7-3
Specifications.......................................................... 8-1
Environmental Specifications..................................... 8-1
EMC Directive Compliance ........................................ 8-1
Electrical Specifications.............................................. 8-1
Mechanical Specifications.......................................... 8-2
I/O Data Sizes............................................................ 8-3
Modbus Specifications ............................................... 8-3
J1939 Specifications .................................................. 8-3
Connectors................................................................ 9-1
Power and Network 15-Pin D-Subminiature............... 9-1
Configuration 25-Pin D-Subminiature......................... 9-2
Warranty ................................................................ 10-1
Support ................................................................... 11-1
Technical Product Assistance.................................. 11-1

Preface iii
© 2002 HMS Industrial Networks Document Id: SCM-7801-026
Preface
About This Manual
This manual discusses the use of the AnyBus-X J1939 to Modbus Interface. It
describes how to install, configure, and operate the module.
Important User Information
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 product development. The
information in this document is subject to change and should not be considered as
a commitment by HMS Industrial Networks. HMS Industrial Networks assumes
no responsibility for errors that may appear in this document
There are many applications of the AnyBus-X module. Those responsible for the
use of this device must satisfy themselves that all necessary steps have been taken
to verify an application meets all performance and safety requirements including
any applicable laws, regulations, codes, and standards.
The illustrations and samples in this guide are intended solely for the purpose of
example. HMS Industrial Networks does not assume responsibility or liability for
actual use based upon the examples shown in this publication.
Modbus is a trademark of Schneider Automation.
Microsoft, MS-DOS, and Windows are trademarks of Microsoft Corporation.

Preface iv
© 2002 HMS Industrial Networks Document Id: SCM-7801-026
Related Documentation
Document Revision
Document Name Author Web Page
Modicon Modbus Protocol Reference Manual Schneider Automation www.modicon.com
J1939 Recommended Practice SAE www.sae.org
Table 1-1 Related Documentation
Date Revision Change Description
2002-09-06 1.00 Initial Release
2002-12-12 1.10 First revision
2002-12-13 1.11 Minor corrections
2003-01-07 1.12 Updated company related information
Table 1-2 Document Revision Log

Chapter 1 AnyBus-X Module Description 1-1
© 2002 HMS Industrial Networks Document Id: SCM-7801-026
AnyBus-X Module Description
Overview
The AnyBus-X J1939 to Modbus Interface (AnyBus-X) allows you to monitor
and control data on a J1939 heavy duty vehicle network using a Modbus RTU
master device. Data from J1939 messages are mapped to I/O table locations, mak-
ing them addressable using standard Modbus read and write commands.
Examples of AnyBus-X applications:
• An interface used on a diesel generator package to access engine parame-
ters from a Programmable Logic Controller (PLC).
• An on-vehicle gateway used to interface the J1939 vehicle network to an
on board industrial automation based control system.

AnyBus-X Module Description 1-2
© 2002 HMS Industrial Networks Document Id: SCM-7801-026
Theory of Operation
The AnyBus-X provides centralized data storage, the “PassageWayTM”, for data
that is shared between the J1939 and Modbus networks. Data is placed into the
PassageWay by one network interface, allowing the data to be read through the
other network interface.
The AnyBus-X appears as a single device on either network using standard proto-
col mechanisms. No special, or extended, protocol features are required of the
devices on either network to read and write the data flowing through the Passage-
Way; all cross-network activity is transparent to the devices on either network.
Figure 1-1 AnyBus-X PassageWay Operation
Modbus RTU Network
J1939 Network
PassageWay
Input
Table
Output
Table
Receive PGNs
Send PGNs
Read Inputs
Write Outputs

AnyBus-X Module Description 1-3
© 2002 HMS Industrial Networks Document Id: SCM-7801-026
J1939 Features
• Transmission and reception of all types of J1939 messages, including
PDU1, PDU2, broadcast and destination specific.
• Complete network address management including address claim, protec-
tion, and yield on higher priority conflict.
• Network address can be self-configurable over a range of addresses.
• J1939 Transport Protocol for transmission and reception of large mes-
sages (9 - 1785 bytes). Both connection based (RTS/CTS) and broadcast
(BAM) are supported.
• Configurable CAN bus-off reset option will reset the network interface
and attempt to return to online when a CAN bus-off condition is detected.
Modbus Features
• Modbus RTU slave.
• RS-485 half-duplex (2 wire) serial interface.
• Configurable baud rates of 4800, 9600, and 19200 bps.
• Configurable for no, odd, or even parity and 1 or 2 stop bits.
• Support of all commonly used Modbus functions for reading and writing
I/O data and diagnostics.
• Overall module, Modbus, and J1939 status and diagnostics accessible
through Modbus diagnostic functions and addressable registers.

AnyBus-X Module Description 1-4
© 2002 HMS Industrial Networks Document Id: SCM-7801-026
System Requirements
The following hardware and software components are needed to use the AnyBus-
X J1939 to Modbus Interface.
Required Hardware
• AnyBus-X AnyBus-X module.
• J1939 network connection.
• Modbus RTU network connection.
• Modbus RTU master device.
• 24 VDC power connection
• PC to execute AnyBus-X Configuration Tool (BWConfig).
• RS-232 null-modem cable to connect PC running BWConfig to the Any-
Bus-X.
Optional Hardware
• DIN rail to mount the AnyBus-X.
Required Software
• AnyBus-X Configuration Tool software (BWConfig) to configure the
AnyBus-X.
• BWConfig requires that the PC be running Microsoft Windows 95, 98,
NT, or 2000.

AnyBus-X Module Description 1-5
© 2002 HMS Industrial Networks Document Id: SCM-7801-026
Hardware Description
The AnyBus-X J1939 to Modbus Interface has a 15-pin D-Subminiature connec-
tor for power and network connections. This connector has pins for module
power, J1939 CAN connections, and Modbus RS-485 connections. See “Installa-
tion” Page 2-1 for details on using this connector.
A 25-pin D-Subminiature connector is provided for connection to a PC running
the AnyBus-X Configuration Tool. This is a standard RS-232 DTE connection
and will require a null-modem cable (pins 2 and 3 swapped) to connect the mod-
ule to a PC serial port. See “Installation” Page 2-1 for details on using this con-
nector.
The front of the module has a set of 3 LEDs that are used for status indication.
These LEDs provide visual status for the overall module, the J1939 interface, and
the Modbus interface. See “Status and Diagnostics” Page 7-1 for details on how
the LEDs are used.
The back of the module has a DIN rail mount to allow the module to be mounted
on a DIN rail.