An indication of whether or not the OPC value requested was determined reliably, whether a communication connection existed and thus a determination of how meaningful the value of an OPC item is.
The OPC standard defines different quality classes that specify a value's quality in more detail. A numeric value is passed for every quality class. The SAP ODA Connector evaluates the quality values passed and issues a suitable information or error message depending on the quality value combination.
SAP przykład użycia QUALITY-OF-OPC-VALUE-READ pomoc. Jak działa quality-of-opc-value-read kod programu ABAP. Wykorzystanie kodu Quality-Of-Opc-Value-Read w programie funtion module SE37. Obsługa funkcji quality-of-opc-value-read w klasie.
Słownik i definicje SAPa na Q.
