DR JOHANNES HEIDENHAN GmbH
D-8225 Traunreut ‘Tel. 108669) 31-O
SERVICE MANUAL TNC 151/155
Kundendienst
Page 47
Section 3.3
Software Exchange
Caution: When exchanging the software observe the MOS
protection procedures!
o The cover of the Control can be removed after unscrewing
the 5 cross-head mounting screws (top side).
o To exchange the program, the following boards
- Main Processor Board
- CLP Processor/Graphics Board
have to be removed from the assembled Control.
Thereto, lift the board ejector keys and press
outwards, pull out board from above and lay onto
MOS
protection mat.
6 Push screwdriver blade carefully between EPROM and socket,
timove EPROM with extraction tool and place onto MOS
protection mat.
0 Insert EPROM into appropriate socket using insertion tool.
Igortant: - When exchanging EPROMs, observe the position
number (second to last digit of the programmed
EPROM Id. NO.
- The EPROM package index must point in the same
direction as the ICs on the board.
- Visually check if the EPROMs are contacting
their
respective sockets after an exchange.
- After the software exchange has been concluded, the Id.-Nos. c
)f
the NC and PI.C software have to be changed. The description
plate for the software numbers is found on the rear of the
control under the type-plate.
Control Id.Na. \
NC Software No. -
PLC
Software No. -
-SAM memory of the Memory Board is unbuffered during
the EPROM (software) exchange.
The machine parameters and
any stored user-program are therefore erased!
For continued operation,
the
machine parameters have to be
re-entered into memory.
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