Check protocol before connector shape
Two devices can both include CAN or RS485 ports and still be incompatible. Confirm the application protocol, message identifiers or register map, byte order, scaling, update interval, alarm definitions, and master-slave relationship.
Check wiring and physical layer details
Incorrect pinout, missing termination, swapped differential wires, duplicated addresses, wrong baud rate, or unsupported firmware can prevent communication even when the equipment is otherwise suitable.
- Confirm CAN-H/CAN-L or RS485-A/RS485-B pinout from both device manuals.
- Confirm baud rate, parity, stop bits, termination, shielding, grounding, and maximum cable length.
- Record firmware versions and supported protocol profiles before commissioning.
Commission operating limits, not only data display
A system may show voltage and state-of-charge but still fail under real operation if charge enable, discharge enable, current limit, contactor status, alarm handling, or fault recovery logic does not match.
