Rockwell-automation 1769-L23E-QB1B_L23E-QBFC1B_L23-QBFC1B CompactLogix Manual de usuario descargar pdf (Pagina 188)

188 Publication IASIMP-QS010B-EN-P - October 2009

Chapter 2 Network Communication

9. Use the table below as a reference to specify the DH-485 settings

specific to your system.

Additional Resources for DH-485 Communication

Rockwell Automation publications are available for electronic download at

http://literature.rockwellautomation.com

or by contacting your distributor.

DH-485 System Protocol Specifications

Characteristic Description

Station Address Specifies the node address of the controller on the DH-485 network. Select a number 1...31 decimal,

inclusive.

To optimize network performance, assign node addresses in sequential order. Initiators, such as personal

computers, should be assigned the lowest address numbers to minimize the time required to initialize the

network.

Token Hold Factor Number of transmissions plus retries that a node holding a token can send onto the data link each time it

receives the token. Enter a value between 1...4. The default is 1.

Maximum Station Address Specifies the maximum node address of all the devices on the DH-485 network. Select a number 1...31

decimal, inclusive.

To optimize network performance, make sure:

• the maximum node address is the highest node number being used on the network.

• that all the devices on the same DH-485 network have the same maximum node address.

Resource Description

Data Highway/Data Highway

Plus/Data Highway II/Data Highway

485 Cable Installation Instructions,

publication 1770-6.2.2

This manual explains how to install various Data

Highway cable networks, including the DH-485

network.

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Rockwell-automation 1769-L23E-QB1B_L23E-QBFC1B_L23-QBFC1B CompactLogix Manual de usuario Pagina 188