DigitalState object returned instead of float

Discussion created by Pawel on Mar 25, 2013
Latest reply on Apr 2, 2013 by Gregor





I'm using the PI HDA OPC Server and there is a tag of float32 type. Most of values returned by ReadProcessed are correct float values. But some of values are null value or DigitalState object. I assume that these values are returned when OPC Server could not determine value for certain interval. So my question is: why sometimes it is null value and sometimes it is DigitalState object?




Thanks in advance