Function library
Torque (torque control)
Holding brake control
12
361
EDBCSXS064 EN 4.0
12.28.5.1 Closing the holding brake
A HIGH level on the input TORQUE−BRK.SetBrake (C7511/4 = TRUE) activates the function.
At the same time, the output TORQUE−BRK.SetQSP is set to HIGH. This signal can be used
to brake the drive to standstill via a deceleration ramp (speed = 0).
If the setpoint speed falls below the value set at the input TORQUE−BRK.SpeedThreshold
(C7531/9), the output TORQUE−BRK.Out is set to HIGH.
Note!
For a fail−safe design this signal must be inverted at the output (e. g. via
C0118).
After the brake closing time set C0195 has lapsed, the output TORQUE−BRK.CInh switches
to TRUE. By means of this signal you can for example activate controller inhibit
(device−internal on the DCTRL function block). The setting of the brake closing time is
required because the brake is not immediately activated at TORQUE−BRK.Out = TRUE (the
drive has to provide another holding torque for the set time).
t
t
t
t
t
0
1
ECSXASA002
Fig. 12−36 Signal characteristic − closing of holding brake
TORQUE−BRK.SetBrake
TORQUE−BRK.SetQSP
TORQUE−BRK.MSetOut
TORQUE−BRK.Out
TORQUE−BRK.SetCInh
TORQUE−BRK.TorqueThreshold
Brake closing time (C0195)
To Next Page
Loading...
