Is it not possible to have a null value for type decimal for a process variable?
Adding a PV of that type initially shows (No Value) but when saved, changes to default value of 0. This means I can't do a check for null to see if the value has been changed or not. I need to detect a change in this value, and I can't check for zero because it's possible the value gets changed from non-zero to zero.
Any ideas? On 16.3.
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