HEIDENHAIN TNC 407 (243 020) Service Manual - Manual (Page 15)

31-O
SERVICE MANUAL TNC 4071415
01.09.1995
Kundendienst 9
A Signal amplitude error
B Signal frequency error
C Error with distance-coded scale
Y CPU number 1 main processor
2 geometry processor
3 CLP processor
Possible causes:
Encoder not connected
Cable damaged
Glass scale contaminated or damaged
Scanning head defective
Encoder monitoring system defective
Wrong reference mark spacing entered with distance-coded
linear encoders (counting error caused by the measuring
system or the LOGIC UNIT)
Temoerature inside the LOGIC UNIT has exceeded 70” C
Emergency-stop test
2. Emergency-stop test
1. 3. Emergency-stop test
Error during the test routine for the output “Control Ready for
Operation” (see section 17.4)
This error message is only generated if the marker 2815 is set
without additional marker
Marke 2924
and marker 2815 set
Marke 3023
Instead of “PLC: ERROR 00 to 99” another dialog may be displayed with customized
PLC programs. For further information, please contact your machine tool manufacturer.