Siemens SINUMERIK 840D sl Series Diagnostics Manual page 690

Overview of Alarms
Cause: - the line contactor was not able to be closed within the time in p0861.
- the line contactor was not able to be opened within the time in p0861.
- the line contactor has dropped-out in operation.
- the line contactor has closed although the drive converter is powered-down.
Remedy: - check the setting of p0860.
- check the feedback circuit from the line contactor.
- increase the monitoring time in p0861.
See also: p0860, p0861
207350 <location>Drive: Measuring probe parameterized to a digital output
Reaction: NONE
Acknowledge: NONE
Cause: The measuring probe is connected to a bi-directional digital input/output and the terminal
is set as output.
Alarm value (r2124, decimal):
9: DI/DO 9 (X122.8)
10: DI/DO 10 (X122.10)
11: DI/DO 11 (X122.11)
13: DI/DO 13 (X132.8)
14: DI/DO 14 (X132.10)
15: DI/DO 15 (X132.11)
Remedy: - set the terminal as input (p0728).
- de-select the measuring probe (p0488, p0489, p0580).
207400 <location>Drive: DC link voltage maximum controller active
Reaction: NONE
Acknowledge: NONE
Cause: The DC link voltage controller has been activated because the upper switch-in threshold
has been exceeded (r1242).
The ramp-down times are automatically increased in order to maintain the DC link voltage
(r0026) within the permissible limits. There is a system deviation between the setpoint and
actual speeds.
When the DC link voltage controller is switched-out (disabled), this is the reason that the
ramp-function generator output is set to the speed actual value.
See also: p1240
Remedy: If the controller is not to intervene:
- increase the ramp-down times.
- disable the Vdc max controller
If the ramp-down times are not to be changed:
- use a chopper or regenerative feedback unit
207402 <location>Drive: DC link voltage minimum controller active
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
Remedy: The alarm disappears when power supply returns.
207403 <location>Drive: Lower DC link voltage threshold reached
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.
2-690
SINUMERIK 840D sl/840D/840Di/810D Diagnostics Guide (DA), 08/2005 Edition
© Siemens AG, 2005. All rights reserved
08/2005