QualityBits Type

The QualityBits type is a collection of boolean values representing the quality bits as returned when reading property values. For further reference, see the following table.

Enum value	Bit	Description
None	0	Variable active/inactive
DefaultValueSetExplicitly	1	Default value set explicitly
DefaultValueSetAutomatically	2	Default value set automatically
ValueRangeViolated	3	WinCC OA value range violated
OutOfRangeValue	4	Value of the variable "out of range"
ExplicitInvalid	5	Explicit invalid
InvalidSetByInterfaceDriver	6	Invalid set by an interface driver
DriverFailed	7	Driver failed
DefaultValueInvalid	8	Default value invalid
SetDuringGeneralQuery	9	Set during general query
SetDuringIndividualQuery	10	Set during an individual query
InterfaceDriverActive	11	Interface driver active
ValueCorrected	12	Value corrected
ValueCondensedOrCompressed	13	Value condensed or compressed, used (HDB & RAIMA) with archiving/compression.
CorrectedValueCondensed	14	Corrected value condensed
AdditionalCorrectionValue	15	Additional correction value
CompressedValueInvalid	16	Compressed value invalid
SourceTimeInvalid	17	Source time invalid (corrected by the Event Manager)
DisableLastValueStorage	19	Disable last value storage
ValueChanged	20	Value changed
ValueUp	21	Value up (or set to same value)
DriverOutOfService	32	Driver out of service
DriverAlarm	33	Driver alarm
DriverFault	34	Driver fault
DriverOverriden	35	Driver overridden
DriverSubscribed	36	Driver subscribed
DriverPropertyInvalid	37	Driver property invalid
TrendTimeShift	40	Trend time shift
TrendLogEnabled	41	Trend log enabled
TrendError	42	Trend error
TrendPurge	43	Trend purge
TrendRollover	44	Trend rollover
TrendValueIsStatus	45	Trend value is status
TrendLogInterrupted	46	Trend log interrupted
TrendStartLogging	48	Trend starts logging
TrendValueReduced	49	Trend value reduced
Priority1	50	Priority 1 (0 bit; 2^0)
Priority2	51	Priority 2 (1 bit; 2^1)
Prority4	52	Priority 4 (2 bit; 2^2)

It is possible to retrieve a specific element by specifying its index in square brackets and obtain the number of elements in the collection with the method length. It is also possible to obtain the corresponding array with the method toArray.

Examples of Use

var propertyValue = read("System1.ApplicationView:ApplicationView.Logics.VirtualObjects.Analog01", "Value");

var quality = propertyValue.value.quality;

console("Quality = {0}", quality)

console("Quality bits count = {0}", quality.length)

for (var i = 0; i < quality.length; i++)

{

console("bit {0} = {1}", i, quality[i]);

}