How to know a lost FieldPoint commu. via OPC

[JYC]

We use FieldPoint to do data acquisition. Our application interfaces to the IO via FieldPoints-provided OPC server. It seems that there is no OPC item to tell you about the communication status between the FieldPoint CPU and your PC. Are I right ?

[Aaron_G]

There is no direct data item published via the OPC server that tells you of the current state of communication between any network module and the OPC Server. However, that does not mean you are unable to determine the status of communications. Any data items that are unavailable will report a bad data status to the OPC Client. OPC Clients will see this as a generic data error (0x80004005 if I recall correctly, though I may be wrong). If the OPC Client supports the GetErrorString method, then you will get specific failure information such as "Open Thermocouple", "No response within timeout period" (comm failure for serial modules), or "Disconnected from item on module" (comm failure for ethernet modules). For more information on the OPC Server, I would recommend th
e FP-2000/2010 Users Manual as it has two pages that detail the OPC Server, including the error reporting. The information applies to the FieldPoint OPC Server as a whole and is not restricted to the FieldPoint OPC Server's behavior when used with FP-20XX modules.

Regards,
Aaron