Dc Brake Active; Internal Voltage Protection Initiated; Drive: Brake Control Error - Siemens Sinamics S120 Diagnostic Manual

SINAMICS alarms
207927 <location>DC brake active
Message value: -
Drive object: SERVO_COMBI, SERVO_SINUMERIK828
Reaction: NONE
Acknowledge: NONE
Cause: The motor is braked with a DC current, the DC current brake is active.
1)
An alarm with response DCBRAKE 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 brake set (p1230 = 4). Braking current p1232 is
injected until this binector input becomes inactive.
Remedy: None necessary.
207928 <location>Internal voltage protection initiated
Message value: -
Drive object: SERVO_COMBI, SERVO_SINUMERIK828
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 auto-
matically 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link voltage falls below 450 V, then the armature short-circuit is withdrawn.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 800 V), the armature short-circuit is withdrawn after 3 minute.
207930 <location>Drive: Brake control error
Message value: %1
Drive object: SERVO_COMBI, SERVO_SINUMERIK828
Reaction: OFF1 (NONE, OFF2, OFF3)
Acknowledge: IMMEDIATELY
Cause: The Control Unit has detected a brake control error.
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.
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.
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Diagnostics Manual, 07/2010, 6FC5398-8BP40-0BA0
Alarms