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OpenLNS Programmer's Reference 150
just been read from the device (for example,
create a data point with the
lcaDataSourceOptionsFromDevice (1)
option set, then set the SourceOptions
property of the data point to this value and
call the SetRawValuesEx method).
Added to API
LNS Release 3.20.
SetValueToUnknown
Summary
Sets the value of the ConfigProperty object to an unknown
state.
You can use this method to clear the value of a
ConfigProperty object from the OpenLNS database. When
you call this method, the value of the ConfigProperty will be
cleared from the OpenLNS database. In addition, all pending
updates to the ConfigProperty object will be cleared. You
should note that this affects how OpenLNS will manage the
configuration property in read and download operations. In
addition, you can use the UploadConfigProperties method to
read all unknown configuration property values into the
OpenLNS database, and you can use the
DownloadConfigProperties method to set all unknown
configuration property values to their defaults.
You can read the current state of the value of a
ConfigProperty object in the OpenLNS database with the
ValueStatus property. If this property is set to
lcaConfigPropertyValueMgmtStatusUnknown (0), then
the value of the ConfigProperty object is already set to an
unknown state. In this case, use of the SetValueToUnknown
method will have no effect on the ConfigProperty.
Availability
Local, full, and lightweight clients.
Syntax
cpObject.SetValueToUnknown
Element
Description
cpObject
The ConfigProperty object to be acted on.
Added to API
LNS Release 3.20.
Properties
The ComponentApps object contains the following properties:
• AppliesTo
• AppliesToType
• ByteLength
• ClassId
• ConfigFileOffset
• ConfigFileType
• ConfigNv
• ConfigNvIndex