Knowledge base Automation Systems Human Machine Interfaces (HMI)

When Multiple Programmable Terminals Are Connected To A PLC With 1:N NT Link Communications And An Error Occurred In One Of The Programmable Terminals, Is It Possible To Detect That Error From The PLC?

Modified on Sun, 11 May, 2025 at 10:13 PM

A Programmable Terminal's operating status is given in bit 15 of the Programmable Terminal Status Notify Bits. That flag can be monitored in the PLC in order to recognize when a Programmable Terminal error occurred, i.e., when the Programmable Terminal is not operating.

 

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