Siemens SINAMICS S120 Function Manual page 227

Prerequisites for activation are as follows:
S One of the following motor types was parameterized:
– Rotating permanent-magnet synchronous motor
– Linear permanent-magnet synchronous motor
p1231 = 1
Pulse enable
1
r0046.4
p1230
(1)
v1
Pulse inhibit
r0046.20
Fig. 4-14 Example of external armature short-circuit braking with/without contactor feedback signal
Internal voltage protection (booksize)
The internal voltage protection is used to protect the drive group when the pulses
are cancelled. This is realized by short-circuiting a half bridge in the power unit.
The voltage protection is activated with p1231 = 3. It is initiated when the pulses
are cancelled.
Prerequisites for activation are as follows:
S A Motor Module booksize is being used
S The power unit current (r0289) must be 180 % of the motor current (p0331).
S One of the following motor types was parameterized:
– Rotating permanent-magnet synchronous motor
– Linear permanent-magnet synchronous motor
© Siemens AG 2006 All Rights Reserved
SINAMICS S120 Function Manual, 03/2006 Edition
Armature short-circuit brake, internal voltage protection
Contactor feedback signal
p1235 = 0723.9 p0723.9
r0002 =19
r1239.0 p0738 = 1239 .0
Contactor
As output
closed p728.8 = 1
p1236= 200 ms
T
= 1
0
1
p1237 = 200ms
DI/DO 9
X122.8
DI/DO 8
X122.7
24V
0 Fault , opening
&
"Contactor feedback
signal missing"
Alarm closing
&
T
Pulse enable HW
If no contactor
feedback signal is
connected
Extended Functions
Converter
M
p1231= 1
~
3
F7905
A7904
p1231= 2
4-227