HEIDENHAIN TNC 306 Service Manual - Manual (Page 15)

SERVICE MANUAL TNC 306/360
Page 11
HEIDENHAIN Service
Screen Display
(blinking error message) Error Cause
WRONG REFERENCE POINT
TNC-OPERATING TEMPERATURE
EXCEEDED
EMERGENCY STOP DEFECTIVE
EMERGENCY STOP PLC
PLC: ERROR 00 1)
to
PLC: ERROR 99 1)
CHECK SUM ERROR 1A 2)
CHECK SUM ERROR 1B 2)
CHECK SUM ERROR 1C 2)
Wrong reference mark spacing entered with distance-coded
linear encoders (counting error caused by the encoder or the
LOGIC UNIT)
The temperature inside the LOGIC UNIT has exceeded
+ 70°C.
Error during the test routine for the output "Control Ready
for Operation" when the machine is switched on (see
section 17.4)
This error message is only generated, if one of the markers
(M2924 - M3023) is set.
Marker 2924
to and marker 2815 set
Marker 3023
Wrong CRC sum NC EPROMs 1/2
Wrong CRC sum PLC-EPROM
Wrong CRC sum NC EPROMs 3/4
CRC = Cyclic Redundancy Check (during data transfer)
1)
With customized PLC programs, a different dialog may be displayed instead of
"PLC: ERROR 00 ...99". For further information, please contact your machine tool
manufacturer.
2)
If the error message "CHECK SUM ERROR YX" comes up repeatedly, please
return the complete logic unit to HEIDENHAIN for repair. Indicate also the
check sum error.
Notes