Coasting Distance Of The Servo Motor Became Longer; Communication (Mitsubishi Electric Ac Servo Protocol) Cannot Be Used - Mitsubishi Electric MR-J5-G Series User Manual

Coasting distance of the servo motor became longer

Possible cause
1.
The load increased and exceeded the
permissible load to motor inertia.
2.
The electromagnetic brake has reached the
end of its service life.
RS-422 communication (Mitsubishi Electric AC servo protocol)
cannot be used
Possible cause
1.
The communication settings are incorrect.
2.
There is a problem with the communication
cable.
3.
The wiring is incorrect.
Check/action method
Reduce the load.
Remove the servo motor and all the wiring from the machine, and check if the
servo motor shaft can be rotated by the hands. If the motor rotates, the brake
has a failure. Replace the servo motor.
Refer to "Characteristics of electromagnetic brake" in the following manual.
Rotary Servo Motor User's Manual (HK series)
Check/action method
Check that [Pr. PC20 Station No. setting] matches the station No. specified by
the controller being used.
Check that [Pr. PC21.1 RS-422 communication - Baud rate selection] matches
the communication baud rate settings of the controller being used.
Replace the communication cable.
Review the wiring.
1 SERVO AMPLIFIER TROUBLESHOOTING
1.4 Trouble which does not trigger an alarm/warning
Model
1
[A]
[G]
[WG]
Model
[A]
209