OPC Data Conversion

A key part of Gateway Communication Driver’s protocol conversion capabilities is its data type conversion between DDE, SuiteLink, and OPC sources and clients. Each protocol has a set of supported data types for the values that can be accessed.

If a client pokes an out-of-range value for any data type, Gateway Communication Driver does no clamping on the value. Gateway Communication Driver passes the client request to the server.

Note: Since InTouch communicates through DDE or SuiteLink protocols, its data type conversions are covered in the following sections that address DDE and SuiteLink conversion.

The following section describes the data conversion mapping scheme applied by Gateway Communication Driver.