Delta MH300 Series - Page 681

Chapter 13 Warning Codes|MH300
13-32
ID No. Display Warning Name Description
39
CANopen bus off
error (CbFn)
CANopen BUS off error
Action and Reset
Action level
Hardwar
e
When CANopen card is not installed, the CbFn warning occurs.
Software
When the master receives wrong communication package,
the CbFn warning occurs.
Too much interference on BUS
The master receives wrong package when the CAN_H and
CAN_L communication cables are short, CbFn warning
occurs.
Action time
Immediately act when the fault is detected
Warning setting parameter
N/A
Reset method
Manual Reset
Reset condition
Cycle the power
Record
When Pr.00-21 CbFn is a “Warning”, and the warning is not recorded.
Cause
Corrective Actions
Check if the CANopen card is
installed
Make sure the CANopen card is installed.
Check if the CANopen speed is
correct
Reset CANopen speed (Pr.09-37)
Malfunction caused by
interference
1. Verify the wiring and grounding of the communication circuit. It is
recommended to separate the communication circuit from the main
circuit, or wire in 90 degrees for effective anti-interference
performance.
2. Make sure the communication circuit is wired in series.
3. Use CANopen cable or add terminating resistance.
Communication cable is broken
or bad connected
Check or replace the communication cable.