
B-65235EN/02 APPENDIX C. FSSB
- 101 -
Relation to servo amplifier
Number of
NC alarms
Message Meaning
430 n axis : servo motor overheat Servo motor is overheat.
431 n axis : cnv. overload (OH) This alarm is occurred if the
temperature of amplifier is
abnormally high.
432 n axis : cnv. lowvolt con./powfault
(LV)
This alarm is occurred if the
control circuit power supply is
abnormally low.
433 n axis : cnv. low volt DC link
(DCLV)
This alarm is occurred if the
DC voltage of the voltage
main circuit power supply is
abnormally low or the outer
circuit breakertrips.
436 n axis : softthermal
(OVC)
Overheat alarm detected by
software
438 n axis : inv. abnormal current
(HC)
This alarm is occurred if an
abnormally over-current flows
in servo amplifier unit.
439 n axis : overvolt power (HV) This alarm is occurred if the
DC voltage of the main circuit
power supply is abnormally
high.
440 n axis : cnv. ex deceleration pow.
(DCOH)
This alarm is occurred if:
The average regenerative
discharge energy is too high
(too frequent acceleration
/deceleration).
441 n axis : abnormal current offset Current feedback is abnormal.
443 n axis : cnv. cooling fan failure
(FAL)
The fan, built into the servo
amplifier unit, has stopped.
445 n axis : soft disconnection alarm Disconnection alarm detected
by software
446 n axis : hard disconnection alarm Disconnection alarm detected
by hardware (note1)
447 n axis : hard disconnection (ext) External pulsecoder cable is
disconnection.
448 n axis : unmatched feedback
alarm
Feedback data of pulsecoder
is unmatched to it of external
pulsecoder.
NOTE
Hard disconnection alarm is not occurred to FS16C, FS16i.
The possibility of FBAL (STATUS1 bit9=1)
External hardware disconnection FBAL (STATUS1 bit9=1,
bit7=1, bit4=1)
Software disconnection (STATUS1 bit9=1)
Count miss error (STATUS1 bit9=1, bit7=1, STATUS2
bit11=1)