Servo-On/Off - Panasonic MINAS A5-series Operating Instructions Manual

2
Preparation
Servo-ON/OFF Action While the Motor Is in Motion
Remarks
Timing at emergency stop or trip. Do not repeat this sequence.
Servo-ON input
input coupler
(SEV-ON)
Dynamic brake
Motor energization
External brake
release output
(BRK-OFF)
Motor rotational
speed
Caution
*1. t1 will be a shorter time of either the setup value of Pr4.38 "Mechanical brake action
at running setup" or elapsing time for the motor speed to fall below Pr4.39 "Brake re-
lease speed setup"
*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
Pr5.06, "Sequence at Servo-OFF" 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 depends on the setup value
of Pr.5.08, "Sequence at Servo-OFF".
Related page
• P.2-34 "Dynamic brake"
10. Timing Chart

Servo-ON/OFF

at Servo-ON
input coupler ON
OFF
*4
engaged *3
not-energized
approx.60ms
engaged
(OFF)
Motor rotational speed
approx.30r/min
servo validated
No servo-ON until the motor speed
falls below approx. 30r/min.
.
at Servo-OFF
released
energized
approx.4ms Setup value of
released (ON)
Motor rotational
speed
Setup value of
Pr4.39
Setup value of
released (ON)
Motor rotational
speed
Setup value of
Pr4.39
input coupler
OFF
1 to 5ms
engaged *3
not-energized *5
Pr4.38
engaged
(OFF)
t1 *1
when setup
value of Pr4.38
Pr4.38
is shorter
engaged (OFF)
t1 *1
when time to fall
below value of
Pr4.39 is shorter
2-33
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