Lenze E84DSxxx - Manual (Page 318)

8 Basic drive functions (MCK)
8.4 Holding brake control
318
Lenze · 8400 protec StateLine · Reference manual · DMS 4.2 EN · 03/2013 · TD05
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8.4.4 Process when brake is closed
1. The motor is decelerated when the setpoint is reduced by the user (e.g. turn down the
potentiometer, setpoint selection via CAN).
• The motor can also be decelerated by the "Quick stop" function or by "DC-injection braking",
either directly requested by the user or as response to an error.
2. If the speed setpoint and the actual speed have fallen below the lower speed threshold or only
the speed setpoint has fallen below the lower speed threshold and the actual value monitoring
time has expired:
• The bBrkReleaseOut trigger signal for the holding brake switching element is set to FALSE for
closing the brake.
• The bBrkReleased status signal is reset to FALSE.
• The brake application time starts to expire.
3. After the brake application time has expired, the controller is inhibited.
Time diagrams
[8-10] Close holding brake in automatic mode via speed threshold (actual value = setpoint)
 Feedforward control
 C02581/1 : Switching threshold
 C02581/2 : Hysteresis for release
 C02581/3 : Hysteresis for application
 Application delay
 C02589/1 : Application time
Œ 
bBrkReleaseOut
0
0
bBrkReleased
CINH
t
t
t
t
  
0
nSpeedSetValue_a_
nSpeedSetValue_a
Œ
Œ Ž