
7. TROUBLESHOOTING
B–63505EN/02
272
Position error amount at stop (DGN 300) exceeds a value set by parameter
No. 1829.
(START)
NO
Is it vertical axis?
Check parameters 1825 and 1829 if they are cor-
rect (see parameter list attached)
Correct ?
Check servo off signal of
each axis. The servo off
function is valid when DGN
G126 bits 0 to 7 is 1.
Servo off funciton is used to
escape overload of an axis
when the axis is mechani-
cally clamped.
Set correct
parameters.
Perform initial setting
of servo parameters
“1” ?
Check PMC
Note)
Recovered ?
Turn off NC power
and remove power
line of motor then
turn on power
Set digital servo pa-
rameters according
to parameter list
Power
supplied?
S Servo amp. module is faulty.
S Servo module failure on main board:
S Main board or option 2 board is faulty.
Motor power line
is broken
Note) Save current CNC pa-
rameters in a floppy disk or
such before performing ini-
tial setting for safety.
Measure in DC range
Be carefull vertical
axis does not drop.
( No power ) ON
YES
NO
YES
YES
NO
YES
YES
NO
Check the motor power
interphase voltage at ter-
minal block TB2 of the
power supply module.
NOTE
1 The configuration and mounting locations of the modules
vary with the specification of the main board. For details,
see Subsec. 2.2.1.
2 When the main board is replaced, all the data stored in
memory is lost. Set NC data again, referring to Chapter 3
“INPUT AND OUTPUT OF DATA”.
7.18
ALARM 410
(EXCESSIVE
POSITION ERROR
AMOUNT DURING
STOP)