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3. SIGNALS AND WIRING
(3) Timing charts
(a) Servo-on command (from controller) ON/OFF
Tb [ms] after the servo-on 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 delay
time (Tb) to about the same as the electromagnetic brake operation delay time to prevent a drop.
(60ms)
(80ms)
Electromagnetic
brake interlock
(MBR)
(Note 1) ON
OFF
ON
OFF
0 r/min
Base circuit
Servo motor speed
Servo-on command
(from controller)
ON
OFF
Coasting
Tb
Electromagnetic
brake operation
delay time
Release
Activate
Driving instruction
(from controller)
Electromagnetic
brake
Release delay time and external relay (Note 2)
(Note 3)
0 r/min
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.
3. After the electromagnetic brake is released, give the operation command from the controller.
(b) Forced stop command (from controller) or forced stop (EM1) 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 command
(from controller)
or
Forced stop (EM1)
ON
OFF
ON
OFF
(Note)
0r/min
Invalid
Valid (OFF)
Electromagnetic brake
operation delay time
(180ms)
(180ms)
(10ms)
Note. ON: Electromagnetic brake is not activated.
OFF: Electromagnetic brake is activated.