Is it possible to detect the disconnection of a PLC using the prosys OPC Client and Ignition OPC Server?
Is it possible to get callback when the PLC is disconnected?
What about sensor? Is it possible to detect a disconnection of a temperature sensor as example?
You could potentially look at the quality of the tags you are monitoring. You could then alarm off of that. There is also a diagnostics folder that contains a tag called “Connection State”. You could use this as well.