8400 StateLine C | Reference manual
Basic drive functions (MCK)
Holding brake control
374 L Firmware ≤ 11.00 - DMS 8.0 EN - 10/2011
8.4.3 Process when brake is released
1. The controller inhibit is deactivated.
2. The magnetic field required for the holding torque is created in the motor (is already
available when a synchronous machine is used).
3. The bMBrakeReleaseOut trigger signal for holding brake switching element is set to
TRUE for releasing the brake.
4. After the brake opening time has elapsed:
–The bMBrakeReleased status signal ("brake released") is set to TRUE.
–In the "Speed follower
" operating mode, the drive synchronises to the already
accelerated speed setpoint.
5. After the waiting time set in C02589/3
has additionally expired, the status monitoring
starts again (if activated via bit 5 in C02582
).
Time diagram
[8-9] Release holding brake in automatic mode via speed threshold
Related topics:
Feedforward control of the motor before release
( 378)
Feedforward control
Setpoint synchronisation
Follow setpoint
n C02581/1
: Switching threshold
o C02581/2
: Hysteresis for release
p C02581/3
: Hysteresis for application
q Time slot for feedforward control/magnetising
r C02589/2
: Release time
s C02610/1
: Ramp time for approaching the setpoint speed
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