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3. SIGNALS AND WIRING
3.11.2 Timing charts
(1) Servo-on (SON) 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.
(95ms)
(95ms)
Electromagnetic
brake interlock
(MBR)
(Note 1)
ON
OFF
0 r/min
Base circuit
Servo motor speed
Servo-on (SON)
ON
OFF
Coasting
Tb
Electromagnetic
brake operation
delay time
ON
OFF
Release
Activate
Forward rotation start
(ST1) or reverse
rotation start (ST2)
Electromagnetic
brake
Release delay time and external relay (Note 2)
(Note 3)
ON
OFF
Note 1. ON: Electromagnetic brake is not activated.
OFF: Electromagnetic brake is activated.
2. Electromagnetic brake is released after delaying for the release delay time of electromagnetic brake and operation time of
external circuit relay. For the release delay time of electromagnetic brake, refer to the Servo Motor Instruction Manual (Vol.2).
3. After the electromagnetic brake is released, turn ON the ST1 or ST2.
(2) Forced stop (EMG) ON/OFF
Electromagnetic brake release
Electromagnetic brake
Dynamic brake
Electromagnetic brake
Dynamic brake
(ON)
Forward
rotation
Electromagnetic
brake interlock (MBR)
Servo motor speed
Base circuit
Forced stop (EMG)
ON
OFF
ON
OFF
(Note)
0r/min
Invalid
Valid (OFF)
Electromagnetic brake
operation delay time
(210ms)
(210ms)
(10ms)
Note. ON: Electromagnetic brake is not activated.
OFF: Electromagnetic brake is activated.