Computer Science, asked by crazzygirl1711, 1 month ago

How does HMI interface with PLC?

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Answered by saransrini03

The HMI unit, depending upon which model you select, will communicate with the PLC using serial communications or by way of an Ethernet connection. HMIs are programmed using free software and via a serial port (USB, or standard DB9 port) available from the vendor.

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