Show If PLC Is Connected [Micro 820]

Hi, I have Ignition 7.9 and micro820 PLC with Kepware OPC Server
I want to show on screen if the PLC has connection so I search a bit of this indication.
I Browse tags in ignition OPC tag path and show the folders in the picture:

which tag I need to choose if I want check PLC communication?

I would imagine Error/NoError.

I usually set up a heatbeat tag in the PLC, then monitor for no change.