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Case 3 – Accessing the Allen- Bradley PLC via the ControlNet interface

In this scenario, the CIP client reads data from the Allen- Bradley PLC. Now, the communication path will be through the CompactLogix acting as bridge between EtherNet/IP and ControlNet.


The yellow line in the above image represents the communication path (route parameters).

In the communication path, the red marked sections always contain a network specific address. The blue marked part identifies the backplane or the interface to be used. It is not important that the backplane is physically existing or virtual. The green part identifies the slot number of the next bridge module (next hop) or the destination module.

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Last update: September 29, 2022