I’ve been getting some complaints about some temperature trends dropping to zero a couple of times a day and I’ve been looking into the problem. The trends look like this:
At first I thought it may be a communication issue, but I log all communication loss alarms and I don’t get any at these times. I then tacked down the actual tag history data in the database and I found this:
It’s inserting nulls with a data integrity code of 600. What is code 600? I can’t find any information for that code anywhere. Also, you’ll notice that the dark red pen does not have this null in the data even though it’s on the same controller as the other pen tags. Any ideas on this or what else I can look for? Thanks!
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