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Allen-Bradley ControlLogix Ethernet Driver Help

Communications Routing

Routing provides a way to communicate with a remote device over various networks. It can be thought of as a bridge between the local device and a remote device even if they are on two different field bus networks. Access to a remote (destination) back plane allows for direct communication with the supported modules located on this back plane. Supported modules include the following:

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ControlLogix 5500 processor for ControlLogix applications. SoftLogix 5800 processor for SoftLogix applications. 1756-DHRIO interface module for DH+ Gateway applications. 1756-CNB or 1756-CNBR interface module for ControlNet Gateway applications.

A routing path is a series of back plane hops, whose last hop points to the destination back plane. Each hop requires a Logix back plane (not a Logix processor). An individual hop can utilize one of the following networks as its medium:

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ControlNet

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DH+

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TCP/IP (EtherNet/IP)

Important: Routing is not supported for ENI and MicroLogix 1100 models. Connection Path Specification

The routing path is specified in the Device ID. As with non-routing applications, communication originates from the Allen-Bradley ControlLogix Ethernet Driver on the PC and is directed at the local Ethernet module. Once at this local Ethernet module, the Device ID specifies a way out of the module and onto the back plane, just like with non- routing applications. The routing path will then direct the message to the desired Logix back plane. The Device ID also determines what device will be communicated with (such as the ControlLogix processor, SoftLogix processor, DH+ node, or ControlNet node).

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