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So the far end is open. Without the second terminator every frame reflects off the open end, the CAN controllers see error frames, the error counter i...

Draw the line for me. Which port of which device goes where, and what does the second cable run connect to at each end? Segment lengths too.

23.6 V rules power out. The trunk's too long for the baud rate, that's all. Thick trunk limits are 500 m at 125 kbps, 250 m at 250 kbps and 100 m at 5...

Photo of the right hand end of the rail, after the last module. And the firmware number off the IM label. Firmware is rarely it, but post it anyway.

E91 is bus-off, the CAN controller gave up after too many errors. Not a node. Was the terminating resistor at the far end refitted after the new trunk...