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source

Syntax​

- source: identifier or expression

Description​

The source operation is one of the few operations that can be used to start the chain of operations that make up a variable.

The source line identifies the data source that will feed the sequence of operations that follows. A valid data source can be a pin, register, or tag name depending on the device being configured. A source can also be another variable name, in which case the final output of the named variable will feed into the start of the new variable's operation chain.

A source can either be a simple name, or can be a complex expression referencing one or more valid data source identifiers. When any of the data sources referenced are updated, the expression will be evaluated and the result passed on to the next stage.

Examples​

  var1:
    - source: AIN0

  var2:
    - source: var1

  var3:
    - source: AIN0 + AIN1
info

In the above example, AIN0 and AIN1 are identifiers available in LabJack data sources.