General Information on the SINUMERIK 840Di sl
1.1 Overview of SINUMERIK 840Di sl
Manual
Commissioning Manual, 05/2008, 6FC5397–4CP10–4BA0
27
Temperature sensor
The SINUMERIK 840Di sl monitors three different temperatures for their respective
thresholds:
1. Housing temperature
2. CPU module temperature
3. CPU temperature
Error reaction
● Alarm: "2110 NCK temperature alarm"
● Logbook entry: "Alarm: Critical temperature"
Cause of errors/error handling
One of the 3 monitored temperatures has reached its threshold value or exceeded it. A
temperature change of at least 3° C before the threshold value is necessary, so that the
alarm is reset.
If the temperature alarm occurs, the user and/or the machine manufacturer (PLC user
program) must decide whether to interrupt machining and end and shut down the
SINUMERIK 840Di sl.
1.1.8 Switch off
Windows XP
To ensure safe operation of the SINUMERIK 840Di sl, Windows XP must be shut down
correctly before the PCU is switched off.
Note
Windows XP is shut down correctly as follows.
• Windows XP Start menu: Start > end
• PLC interface signal: "PC shutdown", see Subsection "840Di sl-specific interface signals".
Failure to shut down Windows XP correctly can damage the Windows XP installation and
prevent the SINUMERIK 840Di sl from operating.
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