Cause:
Only for separately excited synchronous motors (p0300 = 5):
The actual open-loop/closed-loop control mode is I/f control (open-loop) with a fixed current (p1300 = 18).
The speed is entered via the setpoint channel and the current setpoint is given by the minimum current (p1620).
It must be ensured that in this mode, the control dynamic performance is very limited. This is the reason that longer ramp-
up times should be set for the setpoint speed than for normal operation.
Remedy:
Select another open-loop/closed-loop control mode
Reaction upon N: NONE
Acknowl. upon N: NONE
A07927
DC braking active
Message value:
-
Drive object:
All objects
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.
This alarm is automatically withdrawn after DC braking.
F07928
Internal voltage protection initiated
Message value:
-
Drive object:
All objects
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voltage falls below 450 V, then the armature short-circuit is withdrawn.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 800 V), the armature short-circuit is withdrawn after 3 minutes.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
Drive object:
All objects
Reaction:
OFF1 (NONE, OFF2, OFF3)
Acknowledge:
IMMEDIATELY
Faults and alarms
13.2 List of faults and alarms
SINAMICS S210 servo drive system
472
Operating Instructions, 12/2017, A5E41702836B AA
Summary of Contents for SIMOTICS S-1FK2
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