Siemens SINUMERIK 840D sl Series Diagnostics Manual page 608

Overview of Alarms
Parameters: %1 = Operating area name
Definitions: The area %1 has disabled the channel switchover at the moment, as it is performing a
critical operation (e.g. execution from external sources, etc.), during which no channel
switchover may occur.
Reactions: - Alarm display.
Remedy: Wait until the critical operation is finished or end the critical operation manually.
Program Con- Internal
tinuation:
120007
The channel switchover is currently disabled.
Definitions: The channel switchover is currently disabled, as a critical operation, during which no
channel switchover may occur, is being carried out.
Reactions: - Alarm display.
Remedy: Wait until the critical operation is finished or end the critical operation manually.
Program Con- Internal
tinuation:
120008
Control unit switchover, PLC timeout: %1
Parameters: %1 = --
Definitions: 001: MMC would like to go offline from this NCU. MMC has made the offline request in the
online PLC and is waiting for the positive / negative acknowledgement from the PLC.
002: MMC would like to go online to this NCU. MMC has called the target PLC and is wait-
ing for the release to go online.
003: MMC has requested the active operating mode and is waiting for acknowledgement
from the PLC.
Remedy: Check whether the switchover blocks are loaded and started in the online PLC.
120010
PCU temperature alarm
Definitions: The temperature sensor on the PCU module has reached the response threshold.
Interface bit DB10.DB103.6 will be set.
Remedy: Switch off the PCU and let it cool off.
Improve the ventilation of the PCU module.
Check the function of the fan of the PCU module (fan defect).
If the error is displayed again, please inform the authorized service personnel.
120011
Request for authority to operate from another station.%nTo retain authority to
operate=>Recall key,%nto transfer authority to operate=>wait (no entry)
Definitions: The operator of another station requests authority to operate. This can be refused to him
through Recall. After approx. five seconds, the authority to operate will automatically be
transferred to the other station.
Reactions: - Alarm display.
Remedy: The alarm automatically disappears after approx. five seconds or if the Recall key is
pressed within this time limit.
Program Con- Internal
tinuation:
120020
PCU fan monitoring CPU fan
Definitions: Low fan speed of CPU fan.
Interface bit DB10.DB103.4 is being set.
Remedy: Switch off the PCU, let it cool off and have the function of the CPU fan of PCU module
checked by qualified service personnel (fan problem).
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SINUMERIK 840D sl/840D/840Di/810D Diagnostics Guide (DA), 08/2005 Edition
© Siemens AG, 2005. All rights reserved
08/2005