Lenze 8400 TopLine - Manual (Page 667)

Lenze · 8400 TopLine · Reference manual · DMS 6.0 EN · 06/2014 · TD05/TD14
667
9 Basic drive functions (MCK)
9.12 Holding brake control
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
9.12.3 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.
• In the operating modes with setpoint request via control signal (operating modes " Homing ",
" Manual jog " and " Positioning "), the ramping process starts after the brake release at 0.
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
[9-39] Release holding brake in automatic mode via speed threshold
Related topics:
 Feedforward control of the motor before release ( 671)
 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
bMBrakeReleaseOut
0
0 1 2
bMBrakeReleased
CINH
t
t
t
Œ
Œ 
t
nSpeedSetValue_a
nSpeedSetValue_a_

‘

Œ Ž