Applies To:
  • CitectSCADA 5.xx
  • CitectHMI 5.xx

I am using a CitectSCADA's OPC Driver to talk to a Sandvik ASRi - Crusher Hydroset Controller via the Kentima OPC Server. I'm able to communicate to most of the tags correctly both from an OPC Test client and from CitectSCADA, but particular tags can't be read by CitectSCADA. 

This is possible caused by the variable tag address having the wrong case. Many OPC Servers are not case-sensitive when specifying tag names, however it has been shown that the Kentima OPC Server is in fact case sensitive.

You should check to see that case of the variable address you are having difficulty is an exact match with the name published by the OPC server.

For example, if we define a tag address in Citect as:


And the OPC Server publishes this point as:


Then CitectSCADA will not be able to communicate to the point. The case of "a" in "aryCrusherProgs..." needs to the be same.