Lenze EVS9332xP - Manual (Page 157)

Function library
Function blocks
3.5.13 Holding brake (BRK)
3−129
l
EDSVS9332P−EXT DE 2.0
3.5.13.1 Applying the brake
Purpose A HIGH−Signal at the BRK−SET input
activates the function. The BRK−QSP
output is simultaneously set to HIGH.
This signal can be used to decelerate
the drive to zero speed via a
deceleration ramp.
t
t
BRK−SET
MCTRL−NSET2
t
BRK−OUT
BRK−RSP
|BRK−Nx|
C0195
t
BRK−QSP
t
Function If the setpoint speed falls below the
value set at the BRK−Nx input, the
BRK−OUT output is set to HIGH. In order
to ensure a fail−safe design this signal
must be inverted at the output (e.g. via
C0118).
3.5.13.2 Opening the brake (release)
Purpose A LOW signal at the BRK−SET input
immediately sets the BRK−CINH output
to LOW. At the same time the
BRK−M−STORE output is set to HIGH.
This signal can be used to generate a
defined torque against the brake. The
drive thus takes over the torque while
the brake is released. The signal is only
reset after the time set under C0196 is
elapsed.
t
t
BRK−SET
MCTRL−NSET2
BRK−OUT
BRK−RSP
MCTRL−MACT
MACT = C0244
C0196
t
t
BRK−M−STORE
t
BRK−QSP
t
t
Function The BRK−OUT output signal is set to
LOW as soon as the torque reaches the
value set under C0244 (holding torque).
When the input is reset, a time element
is triggered. After the time set under
C0196 has elapsed the BRK−QSP output
is reset. This signal serves to e.g.
release the setpoint integrator after the
brake release time has elapsed.
Note If an actual value higher than the value at BRK−Nx is detected before the brake release time (C0196) has elapsed, the
signals BRK−QSP and BRK−M−STORE are reset immediately. The drive can immediately operate speed or phase−controlled.
If the BRK−QSP output acts on the QSP control word the drive is synchronised to the actual speed and follows its setpoint.