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value-increase-diff

Syntax​

- value-increase-diff

Description​

The value-increase-diff operation does not take any parameters. It watches a numeric input and calculates the difference between the incoming value and previous value. If the difference is greater than 0, it emits the difference value, followed immediately by a 0 value at the same timestamp, making this operation behave similarly to an event. If the difference is less than or equal 0, it emits a 0 value.

One application of value-increase-diff is to modify a part counter where the count may be increasing by more than one on a given timestamp. The extracted difference can be further modified and processed by a corresponding event like accumulate to reconstruct an accumulating part count.

Examples​

  var1:
    - source: partcount
    - value-increase-diff
    - expression: "execution == 'ACTIVE' ? this : 0"
    - accumulate
info

In the above example, partcount and execution are identifiers from another part of the adapter script