Mitsubishi Electric Melservo-J4 MR-J4-DU*B4-RJ100 Series Instruction Manual page 31

If an alarm not subject to the forced stop deceleration function occurs
When the dynamic brake is used, a brake operation delay time occurs. For details, refer to the specifications
of the magnetic contactor you use.
The following timing chart shows that an alarm occurs in any axis in the parallel drive system.
Servo motor speed
Base circuit
(Energy supply to
the servo motor)
Alarm occurrence axis
Drive unit display
ALM (Malfunction)
Servo motor speed
Base circuit
(Energy supply to
the servo motor)
Alarm non-occurrence axis
Drive unit display
ALM (Malfunction)
Alarm occurrence
0 r/min
ON
OFF
No alarm
ON (no alarm)
OFF (alarm)
0 r/min
ON
OFF
ON (no alarm)
OFF (alarm)
Braking by the dynamic brake
Alarm No.
Braking by the dynamic brake
No alarm
3 SIGNALS AND WIRING
3.2 Alarm occurrence timing chart
3
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