I'm using KepServerEx V5 with Allen-Bradley ControlLogix Ethernet driver. I am trying to use the _System._Error and _System._NoError tags to indicate that the connection is OK.

If I disconnect the network cable at the PLC all the data point tag values show Quality = 'bad' but the _System variables don't change and, in particular, the _Error / _NoError bits don't change.

Any ideas?

 

Please contact OPC Support about this. There is a team of OPC experts that will give you a hand with it.

www.opcsupport.com
+1-780-231-9480
+1-780-264-6714

Cheers,
Wassim