Promotic

ValueBeforeChange - property of the PmVar object

Description:
Last value before changing value to current.
Syntax:
Variant ValueBeforeChange
Note:
Property access for read only.
 
The value of this property can be also obtained in the "PmaRoot" item of the INFO system (when looking into the object with this property).
See also:
- PmVar.ChangedOnLastWrite (property)
- PmVar.TimeWrite (property)
- PmVar.TimeChange (property)
- PmVar.Value (property)
Example:
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var oData = pMe.Pm("/Data");
var valBefore = oData.Item(2).ValueBeforeChange;
PROMOTIC 9.0.24 SCADA system documentation MICROSYS, spol. s r.o.

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