Siemens SINUMERIK 840D Series Diagnostics Manual page 21

11.02
2102
Definitions:
Reactions:
Remedy:
Program Continuation:
2110
Definitions:
Reactions:
Remedy:
Program Continuation:
2120
Definitions:
Reactions:
Remedy:
Program Continuation:
 Siemens AG, 2002. All rights reserved
SINUMERIK 840D/840Di/810D Diagnostics Guide (DA) – 11.02 Edition
NCK battery alarm
The undervoltage monitoring (2.4-2.6V) of the NCK battery was detected during system
power-up.
- The NC switches to follow-up mode.
- NC not ready.
- Channel not ready.
- NC Start disable in this channel.
- Interface signals are set.
- Alarm display.
- NC Stop on alarm.
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 1/2AA,
850mAh, min. 3.2V).
The system must then be reinitialized because it must be assumed that data has been
lost in the buffered 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 manufacturing process since the last data backup must be updated manually to match
the present machine status!
Switch control OFF - ON.
NCK temperature alarm
The temperature sensor has reached the response threshold of 60°C 2.5°C.
- Alarm display.
In order to reset the sensor, the temperature must be reduced by 7°C.
Clear alarm with the Delete key or NC START.
NCK fan alarm
The fan consists of a 26VDC motor with electronic commutator (rated speed: approx.
8700rpm). The commutator signal is used for speed monitoring, response speed: <
7500rpm.
- Alarm display.
Please inform the authorized personnel/service department. The unit with the fan and
NCK battery must be replaced.
Clear alarm with the Delete key or NC START.
1 Alarms
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