Do not accept variable values for Quality BAD

Defines which value is written to the variable server when a variable is transferred by the communication component whose quality flag is not QUALITY_GOOD.

Setting

Description of the

The value transmitted by the communication component and the quality flag are entered in the variable.

If the BAD quality flag is signalled by the communication component, the following options are used in response:

Quality flag	Replacement value	Variable value in the variable server
`BAD` not equal to `BAD [LastKnown]`	-	No change
`BAD [LastKnown`]	-	Value from the communication component is adopted
`BAD [*`]	yes and option Send on communication interruption activated	Replacement value is adopted

If no replacement value is specified and the quality flag does not display LastKnown, the process variable in the variable server retains its old value.
If the quality flag displays LastKnown and no replacement value is specified, the value transferred by the OPC server is entered in the variable.
However, if a substitute value has been specified and the Send on communication cancellation option has been activated in substitute value mode, the substitute value is entered in the variable.

In all three cases, the quality flag is adopted accordingly and a change event is triggered via the client.

Parameters for module: