User Manual

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Table Of Contents

1756-UM532A-EN-P
Important User Information
Table of Contents
Purpose of This Manual
Preface
- Who Should Use This Manual
- Other Resources
1756-DH485 Module Overview
- Introduction
- What the Module Does
- Module Requirements
- Module Features
- Prevent Electrostatic Discharge
- Removal and Insertion Under Power
- Typical Applications
- Remote Messaging
  - Remote Upload and Download
- Routing Limitations
  - DH-485 and CIP Messaging
  - Alphanumeric Indicators
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
  - Node Address Identification
- Misconception about the 1761-NET-AIC Converter
- 1747-UIC USB to DH-485 Interface Converter
- Example System Configuration
  - Configure the SLC 5/03, SLC 5/04, and SLC 5/05 Controller Channel 0 for DH-485
- Important Planning Considerations
  - Hardware Considerations
  - Software Considerations
- Additional Resources
Use Data Highway 485 Network
- Introduction
- What Is Data Highway 485?
  - Link Design
- Two Methods of Communication Over a DH-485 Network
- Use DH-485 Messaging
- Configuration Information in DH-485 Messaging
- Application Timeout
- Example DH-485 Network Routing Configuration
- Use the Common Industrial Protocol (CIP) Messaging
Use RSLinx Software to Create a Routing Table
- Introduction
- Choose the Correct Software
- Use RSLinx Software to Create a Routing Table
  - What Is a Routing Table?
  - ControlLogix Routing
- Create the Routing Table
  - Set the Controller Slot
Communicate from an SLC 5/03 Controller to a Logix Controller over a DH-485 Network
- Introduction
- Hardware Configuration
- Use the Controller Slot to Route the Local Message
- Create a Local Message in RSLogix 500
- Configure the Message
- Create a Logic Map for the Local Message in RSLogix 5000 Software
Communicate Between SLC Controllers over DH+ and DH485 Networks
- Introduction
- SLC 5/04 Controller Sends a Remote Message
- SLC 5/03 Controller Sends a Remote Message
Communicate Between a PLC-5 Controller and a Remote SLC 5/03 Controller over Multiple DH-485 Networks
- Introduction
- Hardware Configuration
- Create the Routing Table
  - Configure the PLC-5 DH+ Channel 1A Link ID
- Create a Message in RSLogix 5
- Configure the Message
Communicate from an SLC 5/05 Controller to an SLC 5/03 Controller over an EtherNet/IP Network
- Introduction
- Hardware Configuration
- Create a Message in RSLogix 500
- Configure the Message
- Review the Multihop Feature in RSLogix 500
Communicate to a SLC 5/03 Controller on a DH-485 Network
- Introduction
- Hardware Configuration
- Create a Message in RSLogix 5000
- Configure the Message
Communicate from a Logix Controller to an SLC 5/03 Controller over EtherNet/IP and DH-485 Networks
- Introduction
- Hardware Configuration
- Create a Remote 1756-ENBT Message in RSLogix 5000
- Configure the Message
Specifications
Troubleshoot the 1756-DH485 Module
- Introduction
- Check Power Supply and Module Status
- Interpret the LED Status Indicators
- Interpret the Alphanumeric Indicators
- Interpret the OK Status Indicator
- Routing Errors in DH-485 Messaging
  - Routing Errors in Local DH-485 Messaging
  - Routing Errors in Remote DH-485 Messaging
Index
- Numerics
- A
- C
- D
- E
- F
- H
- L
- M
- N
- P
- R
- S
- T
- U
  - Installation Assistance
  - New Product Satisfaction Return
How Are We Doing?
Rockwell Automation Support
Backcover

Publication 1756-UM532A-EN-P - May 2006

3-8 Use Data Highway 485 Network

Programming Message Block Instructions in a Controller for Remote DH-485

Messaging

Before programming your message block instructions in your controller, you

must:

• determine which links will send and receive remote DH-485 messaging.

• draw a network to make sure you meet the design requirements for

remote DH-485 messaging.

If you are using remote DH-485 messaging, you must also:

• assign link numbers.

The numbers must be a decimal value between 1-199. ControlLogix

chassis backplane may also be assigned link IDs.

• assign DH-485 node numbers.

• use RSLinx software to load routing tables into each 1756-DH485

module.

When using remote DH-485 messaging, you must include the following in the

message instruction:

• Destination link ID - A user-defined number representing a network in

your system.

• Remote node or slot - The node or slot on the remote network with

which you want to communicate.

If the message originates on a DH-485 network, you must also include a local

DH-485 node. The node on your local DH-485 network is capable of routing

the message. If the message originates on EtherNet/IP, ControlNet, or

ControlLogix, you must also include a CIP path to the first 1756-DH485

module.