Definicja quality of OPC value read
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.
Słownik i definicje SAPa na Q.