I am in the process of setting up an external function group for a third party controller. It uses J1939 communication and at least one of the PGN values changes based on the source address of the module. I could not find a way to make the PGN value adjustable in any way. (No dropdown to select a channel value.) I plan to use a few of these third party controllers in systems and therefore will have different source addresses. Is there a way to change the PGN value other than directly typing it in the JFOUT/JFIN channel? Ideally I would like to either use an integer parameter, maybe in an initialization group or integer math in this case since there is a base PGN+SA to make up the different PGN values.
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