User Manual

Faults and alarms
Overview of faults and alarms
3-652
© Siemens AG 2008 - 2013 All Rights Reserved
SINAMICS G120 CU230P-2 Control Units List Manual (LH9), 01/2013
OFF3 QUICK
STOP
Brake along the
OFF3 down ramp
followed by pulse
inhibit
Speed control (p1300 = 20, 21)
• n_set = 0 is input immediately to brake the drive along
the OFF3 down ramp (p1135).
• When zero speed is detected, the motor holding brake (if
parameterized) is closed. The pulses are suppressed
when the brake application time (p1217) expires.
Zero speed is detected if the actual speed drops below
the threshold (p1226) or if the monitoring time (p1227)
started when the speed setpoint <= speed threshold
(p1226) has expired.
• Switching on inhibited is activated.
Torque control (p1300 = 22, 23)
• Changeover to speed-controlled operation and other
reactions as described for speed-controlled operation.
STOP1 - - Under development.
STOP2 - n_set = 0 • n_set = 0 is input immediately to brake the drive along
the OFF3 down ramp (p1135).
• The drive remains in speed control mode.
IASC/DCBRK - - • For synchronous motors, the following applies:
If a fault occurs with this fault reaction, an internal arma-
ture short-circuit is triggered.
The conditions for p1231 = 4 must be observed.
• For induction motors, the following applies:
If a fault occurs with this fault reaction, DC braking is
triggered.
DC braking must have been commissioned (p1230 to
p1239).
ENCODER - Internal/external
pulse inhibit
(p0491)
The fault reaction ENCODER is applied as a function of
the setting in p0491.
Factory setting:
p0491 = 0 --> Encoder fault causes OFF2
Notice:
When changing p0491, it is imperative that the information
in the description of this parameter is carefully observed.
Tabelle 3-2 Fault reactions, continued
List PROFI-
drive
Reaction Description