Device groups and device items

The Device Groups tab in the OI Server Manager user interface is used to create new, modify, or delete device group definitions for an object. For DDE/SuiteLink communications, one or more device group definitions must exist for each PLC that the Communication Driver will communicate with.

Important! For DDE/SuiteLink, it is strongly recommended that each device group (topic) definition contain a unique name for the PLC associated with it. The OPC, however, has the flexibility to use any names, including duplicate names, for the device group definitions.