How can I configure an NI OPC server so that numerical values (all floats)corresponding to amplitudes of certain frequency components are written to pre-defined tags during data acquisition using an NI DAQ card?
I have the NI OPC server installed. I will like to use the OPC server to monitor the performance of a machine using vibration analysis. The examples that ship with Labview and related software mostly work on reading OPC tags using datasocket but I have not seen any that shows how values can be stored in those tags. Moreover, my approach is different in that I want to acquire data, filter it and store some numerical values on the already defined OPC tags. My problem is how to configure the NI OPC server so that I can store numerical values on these tags. I have attached two sample Vis for writing and reading to OPC tags to illustrate my problem. I configured the NI OPC server so that the string (opc://localhost/National Instruments.NIOPCServers/A.B_Tag1) has as channel name (A), device name (B) and tag name (tag1). The NI OPC server is installed in my machine (localhost). When I run the Read_from_OPC_server Vi, the values are all zeros. I know that the problem is probably from this configuration but I do not know how to fix it. In particular, I do not know how to specify the device since I am not using a traditional PLC as is often the case. Is this even feasible? I shall be happy for any help.
Thanks
