Comm-Master™

(Polling Master for Allen-Bradley PLCs)


The MARC™ Model 166-001 Comm-Master™ is a "Polling Master" module for Allen-Bradley Programmable Logic Controllers (PLCs). A Polling Master module collects data from other equipment using a serial data communication port and the communication protocol of the external device. Data collected is written directly to PLC memory for use by the ladder logic programs. The Comm-Master™ collects the data and writes it to PLC memory with no PLC programming required. Sending data to the external device requires a simple message (MSG) instruction in the PLC.

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