Mitsubishi Electric MELSERVO-J2 Series Instruction Manual page 68

3. SIGNALS AND WIRING
(3) Timing charts
(a) Servo-on (SON) command (from controller) ON/OFF
Tb (ms) after servo-on (SON) is switched off, servo lock is released and the servo motor coasts.
If the electromagnetic brake is made valid in the servo lock status, the brake life may be shorter.
For use in vertical lift and similar applications, therefore, set delay time (Tb) to the time which is
about equal to the electromagnetic brake operation delay time and during which the load will not
drop.
Servo motor speed
Base circuit
Electromagnetic
brake interlock(MBR)
Servo-on(SON)
(b) Forced stop (EMG) ON/OFF
Servo motor speed
Base circuit
Electromagnetic
brake interlock (MBR)
Forced stop (EMG)
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0 r/min
(80ms)
ON
OFF
(80ms)
Invalid(ON)
Valid(OFF)
ON
OFF
(10ms)
ON
OFF
Invalid (ON)
Valid (OFF)
Invalid (ON)
Valid (OFF)
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Coasting
Tb
Electromagnetic brake
operation delay time
Dynamic brake
Dynamic brake
Electromagnetic brake
Electromagnetic brake
Electromagnetic brake release
Electromagnetic brake
operation delay time
3 - 31
(180ms)
(180ms)