Siemens Sinumerik 840D sl Diagnostic Manual page 744

Overview of Alarms
SINAMICS-Alarms
207401 <location>Drive: DC link voltage maximum controller de-activated
Message -
value:
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.
207402 <location>Drive: DC link voltage minimum controller active
Message -
value:
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 undershot
(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.
207403 <location>Drive: Lower DC link voltage threshold reached
Message -
value:
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).
207403 <location>Drive: Lower DC link voltage threshold reached
Message -
value:
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).
207404 <location>Drive: Upper DC link voltage threshold reached
Message -
value:
Drive object: SERVO
Reaction: OFF2 (NONE, OFF1, OFF3)
Acknowledge: IMMEDIATELY
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SINUMERIK 840D sl, 840Di sl, SINAMICS, Diagnostics Manual (DAsl), 03/2009
© Siemens AG 2009 All Rights Reserved
03/2009