HEIDENHAIN TNC 415 (259 9x0) Service Manual - Manual (Page 17)

SERVICE MANUAL TNC 415B/425
Page 14
Issue: 20.08.95
Display (blinking) Error Cause
ENCODER DEFECTIVE YA
ENCODER ` DEFECTIVE YA
ENCODER DEFECTIVE YB
ENCODER ` DEFECTIVE YB
ENCODER DEFECTIVE YC
ENCODER `DEFECTIVE YC
Signal amplitude error position encoder
Signal amplitude error speed encoder
Signal frequency error position encoder
Signal frequency error speed encoder
Error with distance-coded scale position encoder
Error with distance-coded scale speed encoder
Y = CPU number 1 = main processor
2 = geometry processor
3 = CLP processor
Error Causes:
- Encoder not connected
- Cable damaged
- Glass scale contaminated or damaged
- Scanning head defective
- Encoder monitoring system defective
Checking the encoders: see section 13
WRONG REFERENCE POINT
TNC OPERATING TEMP. EXCEEDED
EMERG. STOP DEFECTIVE YX
EMERGENCY STOP PLC
Wrong reference mark spacing entered with distance-
coded linear encoders (counting error caused by the
measuring system or the logic unit)
Temperature inside the logic unit has exceeded + 70°C
YX = 1( 1. emergency stop test
1) 2. emergency stop test
1. 3. emergency stop test
- Error during the test routine "Control ready for operation"
when the machine is switched on (see section 19.4)
This error message is only generated, if the marker 2815
is set without additional marker (M2924 - M3023).