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Lenze · 8400 HighLine · Reference manual · DMS 12.0 EN · 06/2017 · TD23
617
8
Basic drive functions (MCK)
8.12
Holding brake control
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8.12.3
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 "
" operating mode, the drive synchronises to the already accelerated
speed setpoint.
• In the operating modes with setpoint request via control signal (operating modes "
",
"
"), the ramping process starts after the brake release at 0.
5. After the waiting time set in
has additionally expired, the status monitoring starts
again (if activated via bit 5 in
).
Time diagram
[8-41] Release holding brake in automatic mode via speed threshold
Related topics:
Feedforward control of the motor before release
Feedforward control
Setpoint synchronisation
Follow setpoint
: Switching threshold
Time slot for feedforward control/magnetising
: Release time
: Ramp time for approaching the setpoint speed
bMBrakeReleaseOut
0
0
1
2
bMBrakeReleased
CINH
t
t
t
t
nSpeedSetValue_a
nSpeedSetValue_a_