Controller connecting to OPC but no data transfer taking place
I am having a problem with a PM861 controller. I've loaded the project into an integrated system and set up the OPC connection. After I have downloaded to the controller I see no errors but I get no data transfer. The customer has multiple CS, all show good OPC connections to both DA and AE. The system is 800xA SV5.1 FP4.
When I look at the communications stats on the OPC Server it shows zero transactions to this applications and the controller doesn't appear in the Total Communication Requirements table at the start of the logfile.
We have tried running the application from within another project and it communicates, when I ran the application on a single node system it all communicated perfectly. The customer downloaded an application from another project to the controller and communications worked.
I've checked the project settings against the other projects in the customer's system, they match.
When I check the OPC status of an item in the Plant Explorer an AddItem error is reported.
I've never seen anything like this before and, frankly, I'm at a bit of a loss. Has anyone else seen something like this?
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