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3. SIGNALS AND WIRING
(3) Timing charts(a) Servo-on (SON) command (from controller) ON/OFFTb [ms] after the servo-on (SON) signal is switched off, the servo lock is released and the servomotor coasts. If the electromagnetic brake is made valid in the servo lock status, the brake life maybe shorter. Therefore, when using the electromagnetic brake in a vertical lift application or thelike, 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 (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