Bad status of all computers IT OPC Server Network in System Status Viewer
In System Status Viewer all computers in IT OPC Server Network begin to show "red" status.
When we check IT Control Connection we see that Summary Alarm get value "KeepAliveFailure" and quality "bad". Also have "bad" status Time and Description.
We restart server, check configuration in the another 800xA systems, try to delete/add one of computers.
It seems to be some problem with PNSM. Check System Status Viewer of object Services on Service Structure, there is any service in Red (specially AssetMonitoring and AssetTree) ? Check Basic Computer Monitoring configuration as well.
Here is the manual of PNSM Operation for System 800xA 5.1 (I don´t know your SV): https://library.e.abb.com/public/7a90f2fa3b224cecb3ab619ec12ef959/3BUA000446-51
Hope that help you
Probably a failure of the ABB.ShadowOPCServer part of PNSM server installation kit.
Try removing ABB PC Network and Software Monitoring kit from the server and then reinstall it again (remember to select Server mode).
Do also check that the WMI and SNMP services are enabled as PNSM server is dependant on these two (see Installation Manual for exact procedure).
Ultimately, have a support case logged with your regional ABB support center.