User Manual
Table Of Contents
- 1756-UM532A-EN-P
- Important User Information
- Table of Contents
- Purpose of This Manual
- Preface
- 1756-DH485 Module Overview
- Overview of the DH-485 Network
- Introduction
- DH-485 Network Description
- DH-485 Network Protocol
- DH-485 Token Rotation
- DH-485 Network Initialization
- Devices that Use the DH-485 Network
- 1747-AIC Isolated Link Coupler for DH-485
- 1761-NET-AIC Advanced Interface Converter Product Overview
- Operating Modes
- Device Compatibility
- Misconception about the 1761-NET-AIC Converter
- 1747-UIC USB to DH-485 Interface Converter
- Example System Configuration
- Important Planning Considerations
- Additional Resources
- Use Data Highway 485 Network
- Use RSLinx Software to Create a Routing Table
- Communicate from an SLC 5/03 Controller to a Logix Controller over a DH-485 Network
- Communicate Between SLC Controllers over DH+ and DH485 Networks
- Communicate Between a PLC-5 Controller and a Remote SLC 5/03 Controller over Multiple DH-485 Networks
- Communicate from an SLC 5/05 Controller to an SLC 5/03 Controller over an EtherNet/IP Network
- Communicate to a SLC 5/03 Controller on a DH-485 Network
- Communicate from a Logix Controller to an SLC 5/03 Controller over EtherNet/IP and DH-485 Networks
- Specifications
- Troubleshoot the 1756-DH485 Module
- Index
- How Are We Doing?
- Rockwell Automation Support
- Backcover

Publication 1756-UM532A-EN-P - May 2006
3-6 Use Data Highway 485 Network
This figure shows an example of remote DH-485 messaging between SLC/03
(or later) controller A and SLC 5/03 (or later) controller B. In this example, the
following information must be included in the remote DH-485 message
routing message instruction:
• Local DH-485 node = 020
• Destination link ID = 2
• Remote DH-485 node = 030
Remote DH-485 Messaging Between
SLC 5/03 Controller A and SLC 5/03 Controller B
Link IDs
To use remote DH-485 messaging, each network that is an originating network
or target network must have a unique link ID. The 1756-DH485 module
requires these link IDs to be decimal values between 1-199. Each DH-485
channel on a 1756-DH485 module must have its own unique link ID.
TERM
T
T
A
A
A
A
B
B
ControlLogix Chassis
SLC 5/03 Controller A
Link ID 1
SLC 5/03 Controller B
Link ID 2
Channel A - Node: 020
Channel B - Node : 025
1756-DH485 Module
44053
AIC+
AIC
AIC+
AIC
Node: 030