Lenze EDS4900U-REG - Manual (Page 155)

Configuration
7-64 48XX/49XXSHB0399
7.4.5.1 Engage brake
The setting of QSP activates the function for the control of a holding brake. The
speed set-value of the drive follows the deceleration ramp of QSP (C105) until
reaching speed 0.
If the actual speed falls below the threshold C019, the control signal for the holding
brake will be activated. At the same time, a time element is activated and after the
time set under C195, the controller will be inhibited. This delay ensures that the
drive provides a holding torque until the brake is reliably activated. Under C318 the
field current can be reduced after the time set under C317.
4900Str049
&
C 0 5 1
> 1
T h r e s h o l d
C 0 1 9
n a c t
Q u i c k s t o p
Q S P
I M P
( T r i p )
B r a k e e n g a g e m e n t
t i m e C 1 9 5
H o l d i n g b r a k e
e n g a g e d
S e t c o n t r o l l e r
i n h i b i t
F D O
FIG 7-22 Block diagram ’Engage brake’
4900Str050
t
t
t
t
t
Q S P
n a c t
e n g a g e d
n = 0
a c t
T h r e s h o l d C 0 1 9
B r a k e e n g a g e m e n t
t i m e C 1 9 5
T i m e d e l a y
C 3 1 7 F i e l d c u r r e n t
r e d u c t i o n
C 3 1 8
C t r l .
i n h i b i t
B r a k e
FIG 7-23 Time diagram ’Engage brake’
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