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3. SIGNALS AND WIRING
(3) Timing charts
(a) Servo-on signal command (from controller) ON/OFF
Tb [ms] after the servo-on (SON) signal is switched off, the 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. Therefore, when using the electromagnetic brake in a vertical lift application or the
like, set Tb to about the same as the electromagnetic brake operation delay time to prevent a drop.
Servo motor speed
Electromagnetic
brake (MBR)
ON
OFF
Base circuit
Invalid(ON)
Valid(OFF)
ON
OFF
Servo-on(SON)
Electromagnetic brake
operation delay time
Tb
Coasting
0 r/min
(60ms)
(80ms)
(b) Emergency stop signal (EMG) ON/OFF
Servo motor speed
Electromagnetic
brake interlock (MBR)
ON
OFF
Base circuit
Invalid (ON)
Valid (OFF)
Emergency stop (EMG)
(10ms)
(180ms)
(180ms)
Dynamic brake
Dynamic brake
Electromagnetic brake
Electromagnetic brake
Invalid (ON)
Valid (OFF)
Electromagnetic brake
operation delay time
Electromagnetic brake release