Tag.QualityCode Property

Returns the quality state of the last PLC access operation for the Tag instance

Property Value

QUAL_GOOD - Value read/written to programmable logic controller is valid.

QUAL_BAD - Value read/written to programmble logic controller is invalid.

QUAL_UNCERTAIN - Value read/write to programmble logic controller is in an unknown state.

Implements

ITag.QualityCode

Remarks

TimeStamp is updated when this property is QUAL_GOOD, otherwise Timestamp is invalid.    

Example

VB
Dim MyPLC As New GELink.Controller("192.168.1.45")
Dim MyTag As New GELink.Tag("%R1")
MyPLC.ReadTag(MyTag)
If MyTag.QualityCode = ResultCode.QUAL_GOOD Then
  Console.WriteLine(MyTag.Value.ToString())
Else
  Console.WriteLine(MyTag.QualityString)
End If



C#
GELink.Controller MyPLC = new GELink.Controller("192.168.1.45");
GELink.Tag MyTag = new GELink.Tag("%R1");
MyPLC.ReadTag(MyTag);
if (MyTag.QualityCode != ResultCode.QUAL_GOOD)
  Console.WriteLine(MyTag.QualityString);
else
  Console.WriteLine(MyTag.Value.ToString());

See Also

Tag Class | GELink Namespace | QualityString | ErrorCode | ErrorString