Faults and Alarms
List of faults and alarms
3-1536
© Siemens AG 2007 All Rights Reserved
SINAMICS S List Manual (LH1), 07/2007
A07401 (N) Drive: DC link voltage maximum controller de-activated
Drive object: VECTOR
Reaction: NONE
Acknowledge: NONE
Cause: The Vdc_max controller can no longer maintain the DC link voltage (r0026) below the limit value (r1242) and was
therefore switched-out (disabled).
- the line supply voltage is permanently higher than specified for the power unit.
- the motor is permanently in the regenerative mode as a result of a load that is driving the motor.
Remedy: - check whether the input voltage is within the permissible range.
- check whether the load duty cycle and load limits are within the permissible limits.
Reaction upon N: NONE
Acknowl. upon N: NONE
A07402 (N) Drive: DC link voltage minimum controller active
Drive object: SERVO, VECTOR
Reaction: NONE
Acknowledge: NONE
Cause: The DC link voltage controller has been activated as the lower switch-in threshold has been fallen below (r1246).
The kinetic energy of the motor is used in order to buffer the DC link. This brakes the drive.
See also: p1240 (Vdc controller or Vdc monitoring configuration)
Remedy: The alarm disappears when power supply returns.
Reaction upon N: NONE
Acknowl. upon N: NONE
F07403 (N, A) Drive: Lower DC link voltage threshold reached
Drive object: SERVO
Reaction: OFF1 (NONE, OFF2, OFF3)
Acknowledge: IMMEDIATELY
Cause: The DC link voltage monitoring is active (p1240 = 2, 3) and the lower DC link voltage threshold (p1248) was reached
in the "Operation" state.
Remedy: - check the line supply voltage.
- check the infeed module
- reduce the lower DC link threshold (p1248).
- switch-out (disable) the DC link voltage monitoring (p1240 = 0).
Reaction upon N: NONE
Acknowl. upon N: NONE
Reaction upon A: NONE
Acknowl. upon A: NONE
F07403 (N, A) Drive: Lower DC link voltage threshold reached
Drive object: VECTOR
Reaction: OFF1 (NONE, OFF2, OFF3)
Acknowledge: IMMEDIATELY
Cause: The DC link voltage monitoring is active (p1240 , p1280 = 5, 6) and the lower DC link voltage threshold (r1246, r1286)
was reached in the "Operation" state.
Remedy: - check the line supply voltage.
- check the infeed module
- adapt the device supply voltage (p0210) or the switch-on level (p1245, p1285).
- disable the DC link voltage monitoring (p1240, p1280 = 0).
Reaction upon N: NONE
Acknowl. upon N: NONE
Reaction upon A: NONE
Acknowl. upon A: NONE
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