I am troubleshooting an outside vendor program where add on instructions are used as well as these user defined function blocks. I am trying to figure out what calls for the specific solenoid to be energized, but when I cross reference the tag I keep hitting a dead end on the logic that would call for this solenoid. Can someone explain to me the best way to troubleshoot these user defined function blocks. Attached is the block with the solenoid in question. Also the Add on's are not read only.
Thanks
RM
Thanks
RM