Allen-Bradley ControlLogix Manual de usuario descargar pdf (Pagina 95)

Rockwell Automation Publication 1756-UM001O-EN-P - October 2014 95

Communication Networks Chapter 5

Data Highway Plus (DH+)

Network Communication

For DH+ network communication, you have two module options for use in the

ControlLogix chassis. Tab l e 20

lists the DH+ modules and capabilities.

For DH+ network communication, use a 1756-DHRIO or 1756-DHRIOXT

module in the ControlLogix chassis to exchange information between these

controllers:

• PLC and SLC controllers

• ControlLogix controllers and PLC or SLC controllers

• ControlLogix controllers

The DH+ network also provides the following:

• Data exchange between controllers

• Plant-wide data sharing

• Cellular level data sharing

You can connect a maximum of 32 stations to one DH+ link:

• Channel A supports 57.6 Kbps, 115.2 Kbps, and 230.4 Kbps.

• Channel B supports 57.6 Kbps and 115.2 Kbps.

Table 20 - DH+ Modules and Capabilities

RIO Module Is used to

1756-DHRIO • Function as a remote I/O (RIO) scanner.

• Support 32 logical rack connections or 16 block transfer connections per channel.

• Establish connections between controllers and I/O adapters.

• Distribute control so that each controller has its own I/O.

1756-DHRIOXT • Function as a remote I/O (RIO) scanner.

• Support 32 logical rack connections or 16 block transfer connections per channel.

• Establish connections between controllers and I/O adapters.

• Distribute control so that each controller has its own I/O.

• Operate in extreme environments with -25…70 °C (-13…158 °F) temperatures.

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Allen-Bradley ControlLogix Manual de usuario Pagina 95