Drive: Dc Link Voltage Minimum Controller Active; Drive: Lower Dc Link Voltage Threshold Reached; Drive: Upper Dc Link Voltage Threshold Reached - Siemens Sinamics S120 Diagnostic Manual

SINAMICS alarms
207402 <location>Drive: DC link voltage minimum controller active
Message value: -
Drive object: SERVO_COMBI, SERVO_SINUMERIK828
Reaction: NONE
Acknowledge: NONE
Cause: The DC link voltage controller has been activated due to the lower switch-in threshold (r1248).
A system deviation can occur between the setpoint and actual speed.
A possible cause can be e.g. that the line supply has failed.
See also: r0056 (Status word, closed-loop control), p1240 (Vdc controller or Vdc monitoring configuration), p1248 (DC
link voltage threshold lower)
Remedy: None necessary.
This alarm automatically disappears after the lower threshold has been distinctly exceeded.
Otherwise, apply the following measures:
- check the line supply and infeed.
- increase the ramp-up times (p1120).
- shut down the Vdc_min controller (p1240 = 0).
207403 <location>Drive: Lower DC link voltage threshold reached
Message value: -
Drive object: SERVO_COMBI, SERVO_SINUMERIK828
Reaction: OFF1 (NONE, OFF2, OFF3)
Acknowledge: IMMEDIATELY
Cause: The DC link voltage monitoring is active (p1240 = 5, 6) 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).
207404 <location>Drive: Upper DC link voltage threshold reached
Message value: -
Drive object: SERVO_COMBI, SERVO_SINUMERIK828
Reaction: OFF2 (NONE, OFF1, OFF3)
Acknowledge: IMMEDIATELY
Cause: The DC link voltage monitoring is active (p1240 = 4, 6) and the upper DC link voltage threshold (p1244) was reached
in the "Operation" state.
Remedy: - check the line supply voltage.
- check the infeed module or the Braking Module.
- increase the upper DC link voltage threshold (p1244).
- switch out (disable) the DC link voltage monitoring (p1240 = 0).
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Diagnostics Manual, 07/2010, 6FC5398-8BP40-0BA0
Alarms