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OPC DA interface handling of "Bad (out of service)"

Question asked by kellyam on Aug 14, 2018
Latest reply on Aug 28, 2018 by gmichaud-verreault

I have a number of instruments that are connected only when used and can be disconnected for a while.

It appears that when Kepware returns "Bad (Out of Service)" the tags stop updating the bad value. Is this normal functionality or should the tag continue to update and read "bad"?

It appears that if the tag is "bad" in Kepware it continues to read but if the Kepware tag is "Bad (Out of Service)" it stops reading. Is there any way to force it to continue to read to get a current bad value?


The interface is set to "Store value flag questionable"