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3. SIGNALS AND WIRING
3.11.3 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
ON
OFF
0 r/min
Base circuit
Servo motor speed
Servo-on (SON)
ON
OFF
Coasting
Tb
Electromagnetic
brake operation
delay time
Release
Position command
(Note 4)
Electromagnetic
brake
Release delay time and external relay (Note 2)
(Note 3)
0 r/min
Electromagnetic brake
sequence output
(parameter No. PC09)
Activate
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 section 12.5.3, 12.6.3.
3. Give a position command after the electromagnetic brake is released.
4. For the position control mode.
(2) Forced stop (EM1) ON/OFF
Tb
Dynamic brake
Dynamic brake
Electromagnetic brake
Electromagnetic brake
Electromagnetic
brake interlock (MBR)
Electromagnetic brake
operation delay time
(210ms)
Electromagnetic brake release
(Note 1) ON
Base circuit
ON
OFF
Servo motor speed
Forced stop (EM1)
Invalid (ON)
Valid (OFF)
Deceleration starts after the forced stop (EM1) turns OFF. (Note 2)
Electromagnetic brake sequence
output (parameter No. PC09)
(210ms)
(10ms)
OFF
Note 1. ON: Electromagnetic brake is not activated.
OFF: Electromagnetic brake is activated.
2. The operation differs from the timing chart of MR-J3-
A servo amplifier.
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