DR.JOHANNES HEIDENHAIN
D-8225
Traunreut
Telefon (066691 31-O. Telex 56831
TNC 114
FAIL DIAGNOSTICS
Page 1 stand: 01.10.83
Kundendienst
1.
Automatic fail diagnostics
With operating faults, an automatic fault message is
issued by the TNC 114 which simultaneously opens the
regulator release contact.
2.
Transducer is defective
The accompanying momentary position LED will blink
with a transducer defect.
Erasing the message:
Switch-off line voltage: switch-on line voltage after
fault has been remedied.
Internal test program
The internal test program will begin after switching-on.
Visual control
- All segments of the momentary position value and
the preset display must illuminate together with the
same intensity.
Defect in the electronic
Faults of this type are coded by the TNC 114, the
lamps over the reference point keys will illuminate.
Erasing the message: if after switching-on the fault
message reappears, the TNC 114 must then be sent to
the factory for repair. (with noted lamp fault coding)
Positioning direction error The following fault conditions may occur:
.
If for a selected positioning direction the machine
coupling lever is switched in the false direction the
- All decimal points of the preset value must illuminate.
The decimal points of the momentary position value must
illuminate from the second decade.
- After approx. 3 sec. the preset values will be in the
axis display, the present value display = 0. Operating
mode El1 with
q
]is selected.
- The momentary test condition will be displqyed in a
coded manner with the LED's of the
q
,a ,
q
,
q
1
keys. The lower LED row will blink with a fault.
The following ICs are tested one after another: ROM,
RAM, TIMER.
feed will be switched-off after 200 lun of traversing. x 0 0 0 ROMerror
A U-shaped symbol will appear in the display. 0 x 0 0 RAM error
Erasing the message: press the
q
1key: restart and 0 0 x 0
bring the cobplinq lever in the x 0 x 0
correct position. 0 x x 0
x x x 0
0 0 0 x
x 0 0 x
timer 1 (Q22). counter 0 (Pin 9-X forwards)
timer 1 , counter 1 (Pin 15-Y ' )
timer 1 , counter 2 (Pin 18-Z w )
timer 2 (Q261, counter 0 (Pin 9-X backwards)
timer 2 , counter 1 (Pin 15-Y u
timer 2 , counter 2 (Pin 18-Z n
