Mitsubishi Electric MELSERVO-J4 MR-J4 TM Instruction Manual page 89

3. SIGNALS AND WIRING
3.6 Forced stop deceleration function
3.6.1 Forced stop deceleration function
When EM2 is turned off, dynamic brake will start to stop the servo motor after forced stop deceleration.
During this sequence, the display shows [AL. E6 Servo forced stop warning].
During normal operation, do not use EM2 (Forced stop 2) to alternate stop and drive. The the servo amplifier
life may be shortened.
(1) Connection diagram
(2) Timing chart
When EM2 (Forced stop 2) turns off, the motor will decelerate according to [Pr. PC24 Forced stop
deceleration time constant]. Once the motor speed is below [Pr. PC07 Zero speed], base power is cut
and the dynamic brake activates.
POINT
When alarms not related to the forced stop function occur, control of motor
deceleration can not be guaranteed. (Refer to chapter 8.)
When network communication is shut-off, forced stop deceleration will operate.
(Refer to section 3.7.1 (3).)
In the torque mode, the forced stop deceleration function is not available.
(Note)
Forced stop 2
Note. This diagram is for sink I/O interface. For source I/O interface, refer to section 3.8.3.
EM2 (Forced stop 2)
Rated Speed
Servo motor speed
0 r/min
Base circuit
(Energy supply to
the servo motor)
MBR
(Electromagnetic
brake interlock)
Servo amplifier
24 V DC
DICOM
EM2
ON
OFF (Enabled)
Ordinary
operation
ON
OFF
ON
OFF (Enabled)
3 - 24
Dynamic brake
Forced stop
Electromagnetic brake
deceleration
Command
Zero speed
([Pr. PC07])
Deceleration time
[Pr. PC24]
+