Access the data in your Communication Driver

Client applications read and write to data items that are internal to the Communication Driver, as well as to the items located in the devices. The client application communicates with the Communication Driver using either OPC or the DDE/SuiteLink protocols. The client application may or may not be on the same computer as the Communication Driver.

You do not need to create device items in the Communication Driver for your OPC client application.

For information on how to specify item references, see Item reference descriptions.