HEIDENHAIN TNC 415 (259 9x0) Service Manual - Manual (Page 18)

SERVICE MANUAL TNC 415B/425
Page 15
Issue: 20.08.95
Display (blinking) Error Cause
PLC: Error 00 1) marker 2924
to to — and marker 2815 set
PLC: Error 99 1) marker 3023
CHECK SUM ERROR YX TNC 407:
1A
1B
1D
1X
TNC 415A:
YA
YC
YD
YE
YR
1X
TNC 415B,
TNC 425:
YA
YB
YC
YD
YE
YR
1X
Y =
CRC sum main processor EPROM chips 1/2
CRC sum main processor EPROM chips 3/4
CRC sum PLC chip
Check sum calculation
CRC sum main processor EPROM chips 1 to 4
CRC sum geometry processor EPROM chips 5/6
CRC sum PLC chip
CRC sum GEM chip 7
CRC sum CLP boot chip
Check sum calculation
CRC sum main processor EPROM chips 1/2
CRC sum main processor EPROM chips 3/4
CRC sum geometry processor EPROM chips 5/6
CRC sum PLC chip
CRC sum GEM chip 7
CRC sum CLP boot chip
Check sum calculation
CPU number
1 = main processor
2 = geometry processor
3 = CLP processor
1) Instead of PLC: ERROR 00 ... 99 another dialogue may be displayed with customized PLC programs.
For further information, please contact your machine tool manufacturer.
CRC = Cyclic Redundancy Check (during data transfer)
If the error message CHECK SUM ERROR YX comes up repeatedly, send the complete logic unit to
HEIDENHAIN for repair. Please indicate the check sum error.