Siemens SINAMICS G150 Manual page 1499

A07927 DC braking active
Message value: -
Message class: Application / technological function faulted (17)
Drive object: VECTOR_G
Reaction: NONE
Acknowledge: NONE
Cause: The motor is braked with DC current. DC braking is active.
1)
A message with response DCBRK is active. The motor is braked with the braking current set in p1232 for the
duration set in in p1233. If the standstill threshold p1226 is undershot, then braking is prematurely canceled.
2)
DC braking has been activated at binector input p1230 with the DC braking set (p1230 = 4). Braking current p1232 is
injected until this binector input becomes inactive.
Remedy: Not necessary.
The alarm automatically disappears once DC braking has been executed.
F07928 Internal voltage protection initiated
Message value: -
Message class: Application / technological function faulted (17)
Drive object: VECTOR_G
Reaction: OFF2
Acknowledge: IMMEDIATELY
Cause: The Motor Module signals that the motor is short-circuited through the power semiconductors (r1239.5 = 1). The
pulses cannot be enabled. The internal voltage protection is selected (p1231 = 3).
Remedy: If the Motor Module supports the autonomous internal voltage protection (r0192.10 = 1), then the Motor Module
automatically decides - using the DC link voltage - as to whether the armature short-circuit should be activated.
The armature short-circuit is activated and response OFF2 is initiated if the DC link voltage exceeds 800 V. If the DC
link voltage falls below 450 V, then the armature short-circuit is withdrawn.
If the motor is still in a critical speed range, the armature short-circuit is re-activated once the DC link voltage exceeds
the threshold of 800 V.
If the autonomous (independent) internal voltage protection is active (r1239.5 = 1) and the line supply returns (450 V
< DC link voltage < 800 V), the armature short-circuit is withdrawn after 3 minutes.
F07930 Drive: Brake control error
Message value: %1
Message class: Application / technological function faulted (17)
Drive object: VECTOR_G
Reaction: OFF1 (NONE, OFF2, OFF3)
Acknowledge: IMMEDIATELY
Cause: The Control Unit has detected a brake control error.
- motor cable is not shielded correctly.
- defect in control circuit of the Motor Module.
Fault value (r0949, interpret decimal):
10, 11:
Fault in "open holding brake" operation.
- No brake connected or wire breakage (check whether brake releases for p1278 = 1).
- Ground fault in brake cable.
- S120M: brake opened via terminal X4.1 for mounting purposes (this is only permissible when the power supply
voltage is switched off).
20:
Fault in "brake open" state.
- Short-circuit in brake winding.
30, 31:
Fault in "close holding brake" operation.
- No brake connected or wire breakage (check whether brake releases for p1278 = 1).
- Short-circuit in brake winding.
SINAMICS G130/G150
List Manual (LH2), 04/2014, A5E03263479A
4 Faults and alarms
4.2 List of faults and alarms
1499