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13. SERVO AMPLIFIERS WITH A LARGE CAPACITY (30k TO 55kW)
3) When controlling magnetic contactor by external sequence
When an alarm occurs, turn OFF the magnetic contactor by the external sequence and shut off the
main circuit power supply.
(95ms)
(3s)
(Note 5, 6)
Tb
(Note 3)
0r/min
Coasting
Electromagnetic
brake operation
delay time
Release delay time and external relay (Note 2)
ON
OFF
Main circuit
power supply
ON
OFF
Servo on command
(from controller)
ON
OFF
Base circuit
ON
OFF
Converter unit control
power supply
ON
OFF
Drive unit control
power supply
(Note 1)
Electromagnetic
brake interlock (MBR)
Servo motor speed
0r/min
Position command
(Note 4)
Release
Activate
Electromagnetic
brake
ON
OFF
Release delay
time and external
relay (Note 2)
Note 1. ON: Electromagnetic brake is not activated.
OFF: Electromagnetic brake is activated
2. Electromagnetic brake is released after delaying for the release 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. Make the controller execute the position command after the electromagnetic brake is released.
4. In position control mode
5. “Tb” refers to a delay time when the electromagnetic brake interlock (MBR) is turned off until when the base circuit is shut
off at servo-off. Set Tb using parameter No.PC02.
6. When turning OFF servo amplifiers, the base circuit remains ready on state. When the status is ready off, the base circuit
and the servo-on command turns OFF at the same time. (Tb=0)