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MDS-D-SVJ3/SPJ3 Series Instruction Manual
2-8 Wiring of the peripheral control
2 - 39
(3) Motor brake release sequence
The motor brake control connector (CN9:MBR) releases the magnetic brake in the sequences in the
following drawing when canceling the emergency stop. The brake is released after the start of the power
ON to the servomotor.
(4) Control during the servo OFF command
When a servo OFF command is input by an NC sequence input, the motor brake turns ON
simultaneously when the motor ON is shut off. Note that the vertical axis drop prevention control is not
validated, so a drop due to the brake operation lag occurs. When the servo OFF is canceled, a drop due
to an uncontrolled state does not occur.
(5) Operation sequences when an emergency stop occurs
The motor brake control output operation when an emergency stop occurs differs according to the motor
deceleration stop method. Refer to section "4-6 Setting for emergency stop" for details on the operation
sequences for each stop method.
The vertical axis drop prevention control only is performed during an emergency stop (including
alarms and power failures). It is not performed when a servo OFF command is input.
1500
1000
5000
ON
OFF
ON
OFF
Emergency stop (EMG)
Dynamic brake
Motor brake control output
(CN9:MBR)
Servo ready signal (RDY)
Servo ready completion
signal (SA)
Motor brake control sequences when an emergency stop is canceled
Ready completion
Command input enable
Time (ms)
ON
Cancel
Cancel
ON
ON
Cancel
SERVO ON
SERVO OFF
OFF
ON
ON
OFF
ON
OFF
200ms
Servo OFF command
Dynamic brake
Motor brake control output
(CN9:MBR)
Motor ON (GATE)
Motor brake control sequences when a servo OFF command is output
CAUTION