Siemens SINUMERIK 840D sl Series Diagnostics Manual page 680

Overview of Alarms
Cause: For closed-loop controlled chassis line supply infeeds: The number of connected and
active voltage sensing modules (VSM) does not match the number of power modules
(connected in parallel).
Fault value (r0949, decimal):
Number of VSMs that are currently assigned to the drive object.
Remedy: Adapt the number of VSMs.
206000 <location>Infeed: Precharging monitoring time expired
Reaction: OFF2 (NONE, OFF1)
Acknowledge: IMMEDIATELY
Cause: After the line contactor closes the power module does not signal the READY state within
the monitoring time (p0857).
The end of the DC link pre-charging was not detected due to one of the following reasons:
- there is not line supply voltage.
- the line contactor is not closed.
- the line supply voltage is too low.
- the power module has detected an internal fault.
- there is a DC link short-circuit.
- the DC link has a ground fault.
- the pre-charging resistors are overheated as there were too many pre-charging
operations per time unit.
- the pre-charging resistors are overheated as the DC link capacitance is too high (max. 20
mF).
- line supply voltage incorrectly set.
See also: p0857
Remedy: - check the line supply voltage
- check or energize the line contactor.
- check and if required increase the monitoring time p0857.
- if relevant, carefully note additional power module fault messages.
- check the DC link regarding short-circuit or ground fault.
- wait until the pre-charging resistors have cooled down.
- reduce the DC link capacitance by removing the power modules or supplementary
modules.
- check the line supply voltage setting (p0210).
206010 <location>Infeed: Power module EP 24 V missing in operation
Reaction: OFF2 (NONE, OFF1)
Acknowledge: IMMEDIATELY (POWER ON)
Cause: In operation, withdraw the pulse enable at terminal EP at the line module (X21.3, X21.4).
Remedy: - do not open the line breaker in operation - only when the pulses are inhibited.
- check the wiring of the DP input (X21.3, X21.4) at the line module to exclude any poor
contacts.
206050 <location>Infeed: Smart mode is not supported
Reaction: OFF2
Acknowledge: IMMEDIATELY (POWER ON)
Cause: The power module does not support the smart mode.
Remedy: - set the sampling time p0115[0] >= 250 µs by setting the sampling time default (p0112) to
the default value.
- de-activate the smart mode with p3400 and supply voltage p0210 <= 415 V.
- upgrade the power module software and/or hardware for the smart mode (r0192).
See also: r0192
206100 <location>Infeed: Shutdown due to line undervoltage condition
Reaction: OFF2 (OFF1)
Acknowledge: IMMEDIATELY (POWER ON)
2-680
SINUMERIK 840D sl/840D/840Di/810D Diagnostics Guide (DA), 08/2005 Edition
© Siemens AG, 2005. All rights reserved
08/2005