Technical data

Faults and Alarms
Faults and Alarms – Overview
3-656
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SINAMICS G120 Control Units CU230P-2 Parameter Manual (LH9), 01/2011
3.1.2 Fault reactions
Specifies the default reaction when a fault occurs. The optional brackets indicate
whether the default fault reactions can be changed and which fault reactions can
be adjusted via parameters (p2100, p2101). The following fault reactions are
defined:
Table 3-2 Fault reactions
List PROFI-
drive
Reaction Description
NONE - None No reaction when a fault occurs.
OFF1 ON/
OFF
Brake along the
ramp-function
generator
deceleration
ramp followed by
pulse inhibit
Speed control
• n_set = 0 is input immediately to brake the drive along
the deceleration ramp (p1121).
• Zero speed is detected if the actual speed drops below
the threshold in p1226 or if the monitoring time (p1227)
started when speed setpoint <= speed threshold (p1226)
has expired.
Closed-loop torque control (p1300 = 22)
• The following applies to closed-loop torque control
mode: Reaction as for OFF2.
• When changing over to closed-loop control using p1501,
the following applies: There is no dedicated braking
response.
OFF2 COAST
STOP
Internal/external
pulse inhibite
Speed control and closed-loop torque control
• Instantaneous pulse suppression, the drive "coasts" to a
standstill
• Switching on inhibited is activated.
OFF3 QUICK
STOP
Brake along
OFF3
deceleration
ramp followed by
pulse inhibit
Speed control
• n_set=0 is input immediately to brake the drive along the
OFF3 deceleration ramp (p1135).
• Zero speed is detected if the actual speed drops below
the threshold in p1226 or if the monitoring time (p1227)
started when speed setpoint <= speed threshold (p1226)
has expired.
• Switching on inhibited is activated.
Closed-loop torque control (p1300 = 22)
• 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 deceleration ramp (p1135). Although ramping
down along the OFF3 deceleration ramp r0052 bit 5 = 1.
• The drive remains in closed-loop speed control mode.
IASC/DCBRk - - • When a fault occurs with this fault reaction, DC braking
is triggered.
• The DC brake must have been put into operation (p1230
to p1239).