HEIDENHAIN TNC151B - Page 14

1
HCllJCNllAlN
mlli
DR. JOHANNES HElDENHAlN GmbH
D-8225 Traunreut ‘Tel. (08669) 31-O
Kundendienst
SERVICE MANUAL TNC 151/155
Page 12
Section 2.2.2
VDD Display (flashing)
PROCESSOR CHECK ERROR 0
I
1
2
3
A
B
C
D
E
F
G
H
I
J
K
L
Fault cause
Incorrect CRC checksum* of machine-related data
excluding machine parameters. (Baud rate, limitation,
preset etc)
Incorrect CRC checksum* (machine parameters)
Incorrect CRC checksum* (user memory)
Integrated Test Program execution incomplete
Software error Main Processor
Software error CLP Processor
MID interrupt** CLP Processor
CLP Processor instruction stack overflow
False instruction: Main Processor
CLP Processor
False instruction (display mode): Main Processor
CLP Processor
CLP Processor RAM
Overflow interrupt
MID interrupt Main Processor
Equipped with incorrect language version
RAM EOOO . ..FFFF Main Processor
Enable a function via machine parameters which is
not integrated in the software
Possible fault location
Main Processor Board
Main Processor Board
Main Processor Board
Main Processor Board
Main Processor Board
CLP Processor/Graphics Board
Main ProcessorjCLP Processor/Graphics Board
CLP Processor Board
Main Processor/CLP Processor/Graphics Board
Main Processor/CLP Processor/Graphics Board
CLP Processor/Graphics Board
Main Processor Board
Main Processor Board
Main Processor Board
Main Processor Board
False machine parameter
* CRC = Cyclic Redundancy Check
** MID = Macro Instruction Detection