Notes about the Function Modules


All individual functions are performed in the R/3 System using RFC-enabled function modules (Remote Function Call). These function modules were first delivered with Release 3.0E.

The function modules for measurement documents and measuring points are able to return the complete object data to the calling application from Release 3.1. This was because the inclusion of floating point fields (Format FLTP) in the structures and tables of the RFC interfaces was not previously supported.


Because all individual functions can be called up using RFC, the calls can also be made by OLE (Object Linking and Embedding) (using SAP’s WDTFUNCS.OCX).

All function modules are online interfaces. In case the R/3 System is ever unavailable, the measurement values to be transferred in the process control system or in the SCADA system must be able to be buffered.