Delta ASDA-A3 Series User Manual page 1165

Troubleshooting
AL018 OA and OB output error
14
Trigger condition
and cause
Checking method
and corrective action
How to clear the
alarm?
AL020 Serial communication timeout
Trigger condition
and cause
Checking method
and corrective action
14-18
Condition: the output frequency of the OA and OB pulses is higher than the
maximum output frequency of the hardware.
Cause:
The resolution of the OA and OB pulses is set too high.
1.
There is interference or cable damage causing communication error.
2.
Encoder error.
3.
The settings of P1.076 and P1.046 should follow these requirements:
1.
P1.076 > motor speed and
Check the communication error rate by setting P0.002 to -80. If this value
2.
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.
Check the fault record (P4.000 - P4.004) and see if an alarm has occurred
3.
(AL011, AL024, AL025, or AL026). Use the checking methods and corrective
actions to clear the alarm if any of them occurs.
If you do not need to use the OA and OB pulses, set P2.065 [Bit 13] to 1 to
4.
disable the detection function for OA and OB output error (AL018 / AL048).
DI.ARST
1.
Contact the distributor.
2.
Condition: RS-485 communication error.
Cause:
Improper setting for P3.004 (Modbus communication timeout).
1.
Servo drive has not received the communication command for a long time and
2.
has timed out (refer to P3.004).
Check and correctly set the value for the communication timeout parameter.
1.
Check if the communication cable is loose or disconnected and make sure it is
2.
correctly wired.
Motor speed
× P1.046 × 4 < 19.8 × 10
60
ASDA-A3
6