7. TROUBLESHOOTING
B–63505EN/02
246
(1)Check manual operation is possible.
(2)Check the status of cycle start LED on machine operator’s manual.
(3)Check status of CNC.
When manual operation is either impossible, perform countermeasure,
based on the previous item “Jog operation cannot be done”.
Confirm that a correct mode is selected according to the mode select status
of CNC status display. Also, by confirming the automatic operation
status it is possible to identify cycle operation, feed hold and cycle stop
state.
“****” is displayed at status display on CRT.
(1)Mode select signal is not correct.
When the mode select signal is input correctly, following status
display is done.
MDI :Manual data input mode (MDI)
MEM :Memory operation mode
RMT :Remote operation mode
If status display does not show a correct status, check the mode signal
with following diagnosis function of PMC side (PMCDGN).
#7
G0043
#6 #5
DNCI
#4 #3 #2
MD4
#1
MD2
#0
MD1
DNCI MD4 MD2 MD1 Mode select
– 0 0 0 Manual data input mode
0 0 0 1 Memory operation mode
1 0 0 1 Remote operation mode
(2)Cycle start signal is not input
This signal turns 1 when cycle start button is pressed and turns 0 when
it is released. The cycle start actuates when it changes from 1 to 0.
Check the state of the signal using PMC’s diagnostic function
(PMCDGN).
#7
G0007
#6 #5 #4 #3 #2
ST
#1 #0
#2 (ST) : Cycle start signal
(3)Feed hold signal is input
Under normal state, the feed hold signal is 1 when the feed hold button
is not pressed.
Check the state of this signal using the PMC’s diagnostic function
(PMCDGN) .
#7
G0008
#6 #5
*SP
#4 #3 #2 #1 #0
#5 (*SP) : Feed hold signal
7.5
AUTOMATIC
OPERATION
CANNOT BE DONE
Points
Causes and Remedies
1. When cycle operation is
not started (Cycle start
LED does not light)