CANbus ports for motordrive -- does BMS-CAN port work?

Q&A and troubleshooting
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1

What it says – for connecting a Sevcon Gen4 controller using the new motordrive option, can this use the (11b) BMS-CAN port or does it have to use the (29b) VE-CAN port?

Right now I have a REC-BMS connected to the VE.CAN port running at 500kbps, and AFAIK the Sevcon is set to 250kbps, so unless it’s reprogrammed (which I don’t have the hardware/software to do) they can’t share a port.

Am I right to think that if the Sevcon was reprogrammed to 500kbps it could share the (29b) VE.CAN port? (daisychained with BMS)

2

Any comments from those in the know – for example @UpCycleElectric @mpvader ?

3

needs to be a real VE.Can port

4

Thanks @mpvader , I suspected that was the case but I thought I’d check.

Am I right to assume that daisychaining on the VE.can port (Cerbo only has one) will be fine so long as baud rate is the same as the BMS?

If not I’ll have to replace the Cerbo with a Mk II (ouch!) and run another CANbus cable through the bulkhead to it, which is awkward too… :frowning: