Siemens Sinumerik 840D sl Diagnostic Manual page 732

Overview of Alarms
SINAMICS-Alarms
Cause: After an OFF1 = 1 no valid current offset measurement was able to be made within the monitoring time
(p3491) before closing the line contactor. The current offset is set to 0.
See also: p3491 (Infeed I-offset measurement monitoring time)
Remedy: - check the DC link for a ground fault. A ground fault can destroy parts and components!
- Check the monitoring time setting and if required increase (p3491). At least 100 ms is required for a
valid measurement (p3491 > 100 ms).
Notice:
If there is no valid measurement, then under certain circumstances the quality of the DC link control
will be reduced.
See also: p3491 (Infeed I-offset measurement monitoring time)
206700 <location>Infeed: Switch line contactor for load condition
Message -
value:
Drive object: A_INF, B_INF, S_INF
Reaction: NONE (OFF2)
Acknowledge: IMMEDIATELY
Cause: For an ON command, the infeed line contactor should be switched under load.
Remedy: - do not load the DC link if the infeed has not issued an operating signal (r0863.0 = 1).
- after the infeed has been powered down, all power units connected to the DC link should be powered
down. To realize this, the operating signal of the infeed (r0863.0) must be suitably interconnected.
206800 <location>Infeed: Maximum steady-state DC link voltage reached
Message -
value:
Drive object: A_INF, S_INF
Reaction: NONE
Acknowledge: NONE
Cause: The DC link voltage setpoint has reached the maximum steady-state voltage parameterized in p0280.
The DC link voltage is increased by the modulation depth reserve controller for the following reasons:
- modulation depth reserve is too low (p3480).
- line supply voltage is too high.
- supply voltage (p0210) parameterized to be too low.
- excessively high setpoint for the reactive line current.
Remedy: - check the line supply voltage setting (p0210).
- check the line supply for an overvoltage condition.
- reduce the modulation depth reserve (p3480).
- reduce the reactive current setpoint.
See also: p0210, p0280, p3480
206810 <location>Infeed: DC link voltage alarm threshold
Message -
value:
Drive object: A_INF, B_INF, S_INF
Reaction: NONE
Acknowledge: NONE
Cause: In operation, the DC link voltage has dropped to below the alarm threshold. The alarm threshold is
obtained from the sum of p0279 and r0296.
Possible causes include:
- line supply voltage dip or another line supply fault.
- overload of the infeed.
- for ALM: Incorrect controller parameterization.
See also: p0279 (DC link voltage offset alarm threshold), r0296 (DC link voltage undervoltage thresh-
old)
Remedy: - check the line voltage and line supply quality.
- reduce the power drawn, avoid step-like load changes
- for ALM: Adapt the controller parameterization, e.g. using an automatic line supply identification
(p3410 = 4, 5).
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SINUMERIK 840D sl, 840Di sl, SINAMICS, Diagnostics Manual (DAsl), 03/2009
© Siemens AG 2009 All Rights Reserved
03/2009