Nck Battery Alarm; Nck Temperature Alarm - Siemens Sinumerik 840D sl Diagnostic Manual
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03/2009
Remedy:
If the NCK battery is replaced without interrupting the power supply, no data will be lost. This means
that production can continue without taking any further steps. (A buffer capacitor on the NCK holds
the supply voltage for at least 30 minutes and the battery can be replaced within this time even when
the control is switched off).
Sinumerik combines an NCU's two potential parts subject to wear (fan/battery) in one shared mechan-
ically replacable module the construction of which is easily accessible.
When the battery module is unplugged during operation, the module is also separated from the fan's
air supply. Therefore the battery should only be replaced during operation, if production cannot be
continued otherwise.
If it is not possible to replace the battery quickly, a second fan/battery module should be available for
use during the replacement process. It should be plugged onto the NCU during replacement of the
battery.
In this context please note for the safety function of the '840D sl' that it will switch off the module auto-
matically after a certain time, if the fan is defect or not plugged in; this will protect the NCU from thermal
destruction (see Manual: chapter Dual fan/battery module).
Program Con-
Clear alarm with the Delete key or NC START.
tinuation:
2102
NCK battery alarm
Definitions:
The undervoltage monitoring (2.4 - 2.6 V) of the NCK battery was detected during system power-up.
Reaction:
NC not ready.
The NC switches to follow-up mode.
Channel not ready.
NC Start disable in this channel.
Interface signals are set.
Alarm display.
NC Stop on alarm.
Remedy:
Please inform the authorized personnel/service department. Pull out the battery/fan unit from the NC
module and replace the battery (type: lithium battery with lead, size 1/2 AA, 850 mAh, min. 3.2 V).
The system must then be reinitialized because it must be assumed that data has been lost in the buff-
ered RAM during the last power-off phase as a result of insufficient supply voltage (refer to Section
2.2 in the Installation and Start-up Guide for the procedure).
The following data might have been corrupted or entirely lost:
- NC machine data
- Drive machine data
- Option data
- Setting data
- User variable
- Global subroutines
- Cycles and macros, as well as
- PLC machine data
- PLC basic program
- PLC user program, and all
- PLC user data
User data in the NCK and PLC (e.g. tool and workpiece data) that have been altered by the manufac-
turing process since the last data backup must be updated manually to match the present machine
status!
Program Con-
Switch control OFF - ON.
tinuation:
2110
NCK temperature alarm
Definitions:
The temperature sensor has reached the response threshold of 60 degrees C +/- 2.5 degrees C.
Reaction:
Alarm display.
Remedy:
In order to reset the sensor, the temperature must be reduced by 7 degrees C.
Program Con-
Clear alarm with the Delete key or NC START.
tinuation:
© Siemens AG, 2009. All Rights Reserved
SINUMERIK 840D sl, 840Di sl, SINAMICS, Diagnostics Manual (DAsl), 03/2009
Overview of Alarms
NCK alarms
2-17
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