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4 Faults and alarms
4.1 Overview of faults and alarms
SINAMICS G120C
454 List Manual (LH13), 04/2014, A5E33840768B AA
OFF3 QUICK
STOP
Braking along the
OFF3 down ramp
followed by pulse
inhibit
Closed-loop speed control (p1300 = 20, 21)
• n_set = 0 is input immediately to brake the drive along the OFF3
ramp down (p1135).
• When zero speed is detected, the motor holding brake (if
parameterized) is closed. The pulses are suppressed when the
closing time of the holding brake (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.
STOP2 - n_set = 0 • n_set = 0 is input immediately to brake the drive along the OFF3
ramp down (p1135).
• The drive remains in closed-loop speed control.
IASC/
DCBRAKE
-- • For synchronous motors, the following applies:
If a fault occurs with this fault reaction, an internal armature 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.
Table 4-2 Fault reactions, continued
List PROFIdrive Reaction Description
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