Panasonic Minas A4 Series - Page 47

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[Preparation]
Preparation
Servo-ON/OFF Action While the Motor Is in Motion
(Timing at emergency stop or trip. Do not repeat this sequence. During the normal operation, stop the motor,
then make Servo-ON/OFF action.)
<Cautions>
*1. t1 will be a shorter time of either the setup value of Pr6B or elapsing time for the motor speed to fall below
30r/min.
*2. Even though the SRV-ON signal is turned on again during the motor deceleration, Servo-ON will not be
activated until the motor stops.
*3. For the action of dynamic brake at alarm occurrence, refer to an explanation of Pt69, "Sequence at
Servo-OFF ("Parameter setup" at each control mode) as well.
*4. Servo-ON will not be activated until the motor speed falls below approx. 30r/min.
*5. For the motor energization during deceleration at Servo-OFF, refer to an explanation of Pr69, "Sequence
at Serve-OFF ("Parameter setup" at each control mode) as well.
OFF OFF
ON
engaged *3 released
not-energized
engaged *3
*4
not-energized *5energized
engaged
(OFF)
released (ON)
engaged (OFF)released (ON)
No servo-ON until the motor speed 
falls below approx. 30r/min. 
1 to 5ms
approx.40ms
Setup value of 
Pr6B
Setup value of 
Pr6B
when setup

value of Pr6B

is shorter,
approx.2ms
approx.30r/min
Dynamic brake
Motor energization
Motor rotational 
speed
Motor rotational speed
servo validated
Brake release output 
(BRK-OFF)
Servo-ON input
(SEV-ON)
when time to fall

below 30r/min 
is shorter,
Motor rotational
speed 
approx.30r/min
Motor rotational
speed 
approx.30r/min
at Servo-ON at Servo-OFF
t1 *1
t1 *1
engaged
(OFF)