Lenze E84DSxxx - Manual (Page 317)

Lenze · 8400 protec StateLine · Reference manual · DMS 4.2 EN · 03/2013 · TD05
317
8 Basic drive functions (MCK)
8.4 Holding brake control
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
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 bBrkReleaseOut trigger signal for holding brake switching element is set to TRUE for
releasing the brake.
4. After the brake opening time has elapsed:
• The bBrkReleased status signal ("brake released") is set to TRUE.
• The drive synchronises to the already accelerated speed setpoint.
Time diagram
[8-9] Release holding brake in automatic mode via speed threshold
Related topics:
 Feedforward control of the motor before release ( 321)
 Feedforward control
 Setpoint synchronisation
 Follow setpoint
 C02581/1 : Switching threshold
 C02581/2 : Hysteresis for release
 C02581/3 : Hysteresis for application
 Time slot for feedforward control/magnetising
 C02589/2 : Release time
 C02610/1 : Ramp time for approaching the setpoint speed
bBrkReleaseOut
0
0 1 2
bBrkReleased
CINH
t
t
t
Œ
Œ 
t
nSpeedSetValue_a
nSpeedSetValue_a_

‘

Œ Ž