Open Platform Communications (OPC) data quality

The Open Platform Communications (OPC) server allows OPC clients to access RealTime data as well as data that has been published through PubSub middleware. Data quality of the points is primarily determined by the OPC server connectivity.

The OPC server accesses the PubSub middleware and not the AVEVA Enterprise SCADA Programmable Logic Controllers (PLCs) directly. Therefore, the data quality of the points is based on the OPC server connectivity via PubSub to the RealTime database (RTDB). This means that if the OPC server acquired the point value from the RTDB without error, the OPC data is of good quality.

Optionally, there are several telemetered points that can have their data quality determined based on the actual data quality of the point. This is done by enabling the MAPDATAQUALITY flag.