RSLinx OPC server data optimization.

I have a question about the OPC server in RSLinx. I have a large-ish block of data that is I want transfered to RSView/FTView when the system starts up. After that the data does not need to be transferred again as it does not change.

If I have tags defined in RSView/FTView however, will that data be transferred continuously at the polling rate? I think the answer is yes but I wanted to make sure.

You can program a MSG block in the PLC.
And in the RSLInx OPC Topic configuration, you turn off "Polled messages", and turn on "Unsolicited messages".
You can then program a singe message from the PLC to the PC with RSlinx.
Not sure if there is much more to it. It has been a long time since I dabbled with it.