Error Excess Position - Mitsubishi FREQROL-SFJ Maintenance Manual

Cause
Fuse biown out
Trouble with dis-
charge resistor unit
cooling fan
Trouble with dis-
charge resistor unit
thermosensor
(thermoswitch)

(15) ERROR EXCESS POSITION

This alarm appears if deviation of true stop position
from commanded stop position is excessive in oriented
spindle stop operation or position control loop opera-
tion.
Cause
Parameter (orien-
tation of encoder)
setting improper
Checkup
'stopped
Check 'if the fan remains
stopped due to blown out
fuse.
If new fuse is blown out
again,
Check wiring of motor
cooling fan and discharge
resistor unit cooling
fan (short-circuit,
grounding fault, etc.).
Check if resistor unit cool-iReplace the cool-
ing fan is in standstill or
does not run satisfactorily.i
Check if thermosensor does
not reset when the cooling
fan is operated for 15 -
16 min. with the motor
stopped.
Checkup
Check if alarm is removed
when bit 8 of par,ameter
type oriented spindle stop
operation.
Remedy
tional rernedy~./
2. Replace
Replace the fuse.
Remedy the wiring./
ing fan.
Replace the dis-
charge resistor
unit.
Remedy
Set parameter
0RS2 properiy.