Add-on variable |
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The add-on variable is the data point which is associated with the command interlocking and which is used for loading the picture of type 'Power'.
There must always be a command interlocking configured for the add-on variable. The response variable and the action variable are then determined from the command interlocking.
However, this does not mean that the variable must be used for the command interlocking. If the used command interlocking defines the response variable absolutely and if the action variables are defined absolutely, it is also possible to not use the add-on variable in the command interlocking. Substituion does not work here because the data point cannot be resolved.