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ValueBeforeChange - property of object PmVar

Description:
Last value before changing value to current.
Syntax:
Variant ValueBeforeChange
Calling:
v = oData.Item(id).ValueBeforeChange
Note:
Property access for read only. The value of this property can be also obtained in the INFO system in "PmaRoot" item (when looking into the object with this property).
PROMOTIC 9.0.7 SCADA system documentation - MICROSYS, spol. s r.o.

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