Check Device Connection Status Via Scripting

[JordanCClark]

One way: system.device.listDevices()

Another path:

[System]Gateway/Devices/DeviceName/Status

Third way (and best, IMO): use a heartbeat.

How to detect PLC failure

Hi All, Thanks for the reply. I am using a bit of code in PLC to go 1,0 every sec when the PLC is healthy. [PLC_HeartBeat%20logic]. Then I am using an expression tag with the following expression - if(hasChanged({[.]PLC_Heartbeat}),1,0) This tag is set as an alarm to flag up when the heartbeat is not healthy and I have set it to a ‘clock’ scan class. I have tested it and this seems to be working fine with following errors - Any minor/major PLC faults. PLC network/comms error. Connecti…