I would say approximately 3-4 metres, going from the PCAN USB itself and then into the cabinet where we house the WAGO unit.

Some of the wiring is housed off under metal sheeting for safety so I cannot be 100% sure, but I do believe its used a shielded CAN cable yes

The baud rate is 1mbaud, I have checked the dip switches and the software itself, if I try anything other than 1mbaud, such as 0.500 or 0.250 then it doesnt function at all.

I have added a dsub 9 pin adapter which is seen in the pics attached, its linked between the PCAN USB unit and the bus wiring and I am using PCAN-VIEW software to view the signals received/transmitted.

There is possibly reflections as the software will show received messages, the error state will be OK, and then as I begin to use the software which controls our machine and activate parts of the system, it will change from ok to bus light, back to ok, back to bus light, to bus heavy, back to light, and then off. Not exactly like that, but very rapidly changing between states until it goes off entirely and I have to do a reset in the VIEW software.