Operating Instructions

Warning Codes
Digital Keypad RT-KEYPAD
281 | 443
Action time
The upper unit sets the confirming time of producer and consumer during configuration.
Warning setting parameter
N/A
Reset method
Manual reset
Reset condition
The upper unit sends a reset package to clear this warning.
Record
When Pr.00-21≠3, CHbn is a “Warning”, and the warning is not recorded.
Cause
Corrective Actions
The heartbeat time is too short
Increase heartbeat time (Index 1016)
Malfunction caused by interference
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 degree for effective anti-interference
performance.
Make sure the communication circuit is wired in series.
Use CANopen cable or add terminating resistance.
Communication cable is broken or
bad connected
Check or replace the communication cable.
ID No.
Display on LCD Keypad
Warning Name
Description
39
CANopen bus off error
(CbFn)
CANopen BUS off error
Action and Reset
Action level
Hardware
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≠3, 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
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 degree for effective anti-interference
performance.
Make sure the communication circuit is wired in series.
Use CANopen cable or add terminating resistance.
Communication cable is broken or
bad connected
Check or replace the communication cable.