Firmware
≤
11.00 - DMS 8.0 EN - 10/2011
L
375
8400 StateLine C | Reference manual
Basic drive functions (MCK)
Holding brake control
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
bMBrakeReleaseOut
trigger signal for the holding brake switching element is set
to FALSE for closing the brake.
– The
bMBrakeReleased
status signal is reset to FALSE.
– The elapse of the brake application time starts.
3. After the brake application time has expired, the controller is inhibited.
4. After the waiting time set in
C02589/3
has additionally expired, the status monitoring
starts again (if activated via bit 5 in
C02582
).
5. In order to prevent the drive from further rotating/accelerating in the event of an error
of the feedback contact, controller inhibit is cancelled again and the drive is held at
standstill in a speed-controlled manner.
Time diagrams
[8-10] Close holding brake in automatic mode via speed threshold (actual value = setpoint)
Feedforward control
n
C02581/1
: Switching threshold
o
C02581/2
: Hysteresis for release
p
C02581/3
: Hysteresis for application
q
C02593/2
: Application delay
r
C02589/1
: Application time
bMBrakeReleaseOut
0
0
bMBrakeReleased
CINH
t
t
t
t
0
nSpeedSetValue_a_
nSpeedSetValue_a
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: info@clrwtr.com
