If you open LON Explorer and select the LN card, are there the same number of ports as you have L24 cards in the SPI loop? Because the test for the SPI loop is looking at a lot more than you’d think. It needs to see the correct number of ports and will even fault if an IO is active that isn’t assigned. It sounds like it’s looking for 1 less port than you actually have. It would do this if your LN card jumpers were set like the car LN card where it uses the on board port. JP2 should be on pins 2-3 for the hall. The only way you can use a CAT5 coupler to jump out L24 cards on the hall is to move JP2 from 2-3 to 1-2 so it is looking for 1 less port in the loop.
