February 2012 18 – 259
8 Screw the cover plate back on and remount the MC 6222 in the console.
Exchanging the
buffer battery
of the MC 6241
To exchange the buffer battery of the MC 6241, proceed as follows:
8 As a precaution back up the condition of non-volatile PLC markers and words from the RAM to
the data medium. --> See ”Non-volatile PLC markers and words” on page 11 – 134.
8 Back up the data. --> See ”Data backup” on page 14 – 181.
8 Switch off the machine, take precautions against restart, ensure that the equipment is free of
potential.
8 Label the cables and disconnect them from the MC 6241.
8 Remove the MC 6241 from the electrical cabinet.
8 Screw off the lateral cover plate.
8 Remove the cover plate.
8 Remove the old buffer battery.
The buffer battery can be purchased from specialized dealers (e.g. www.renata.com).
If the battery was exchanged although the Gold cap was not loaded sufficiently, the battery-
buffered ranges of the RAM may be deleted. The non-volatile PLC markers and words belong
to this range. This may mean that several components of the machine must be set again (tool
changer, swivel head, etc.) --> Ask the machine tool builder!
The datum and the time of the BIOS setting were lost. Set these values again.
--> See ”Setting the system time” on page 13 – 173.
Housing parts of the MC 6241 need to be removed to replace the buffer battery.
The device must not be under power; observe the safety precautions.
---> See ”Safety precautions” on page 2 – 15.
Take ESD-preventive measures (See ”ESD protection” on page 29 – 520) and work with great
care!
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