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Is it possible to log a measurement in ION or StruxureWare only when it changes value?

Using Designer, it is possible to only log a measurement when it changes value.
The following modules are needed:

Arithmetic Module
Convert Module
Data Recorder Module



Logic:

The Arithmetic module will compare the current value of the measurement to the last value. When the different between those two values is anything other than 0, the output of the arithmetic module will be 1. The convert module will see the change from 0 to 1 and pulse out to the record input of the Data Recorder Module. The value being compared will be the source of both the Arithmetic Module and the Data Recorder Module.



Input of the Arithmetic Module



Formulas used in the Arithmetic Module




Input of the Convert Module



Input of the Data Recorder Module

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