Satec Expertmeter PM180 Reference Manual page 22

Figure 30 - Output variable mapping
For input variables set an internal device signal that will be a source of
input variable (digital input, relay output, event flag, etc.).
For output signal set an action that will be accomplish when the input
has the proper value.
In any case you should expand desired folder and choose variable you
want to map and then click on Ok.
Please note that you can choose addresses with corresponding type
only, other addresses in the «Setup variable address» are marked in
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