Delta ASDA-A3 Series User Manual page 1162

ASDA-A3
AL011 CN2 communication failed
Trigger condition
and cause
Checking method
and corrective action
How to clear the
alarm?
Condition: connection to the encoder is in error.
Cause:
CN2 wiring is incorrect.
1.
CN2 connector is loose.
2.
CN2 wiring is poor.
3.
Connection to the encoder is cut off due to interference.
4.
Encoder is damaged.
5.
A motor not supported by the A3 series servo drives is used.
6.
Check if the wiring follows the instructions in the user manual. If not, connect
1.
the wire correctly.
Check the connection between the CN2 port of the servo drive and the CN2
2.
connector. If the connection is loose, reconnect the CN2 connector to the CN2
port of the servo drive.
Check for the encoder cable and connector which connect the motor and
3.
CN2 port of the servo drive to see if there is any poor wiring or damaged
wires.
If so, replace the connector and cable.
Check the communication error rate by setting P0.002 to -80. If this value
4.
increases continuously, it means there is interference. Check the following
items:
(a) Check if the motor is properly grounded. Make sure the ground end
(green) of the power cable is grounded to the servo drive heat sink.
(b) Check if the connection for the encoder signal cable is normal. Make sure
the encoder signal cable is separated from the power supply or any
high-current cables to avoid interference.
(c) Use shielded cable for the encoder cable. Pull out the wire mesh and
have it correctly grounded.
If you took all corrective actions but the issue persists, replace the motor.
5.
Contact the distributor for the supported motor models or encoder
6.
specifications.
Cycle power on the servo drive.
Troubleshooting
14
14-15