I've always had this on our group's modular layout, where several modules have feedback with a mix of LR101 and LDT units. ?I wonder if it matters when the parts of the system power up. I usually have to place my polarity tester on at least one block for each unit to give a detection signal, then the rest of that unit's blocks will show up if occupied.?
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Do you have the track power monitor connected on the LR101? that may help.
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Mike
