
APPENDIXA. ALARM LIST
B–63465EN/01
112
Number ContentsMessage
442 n AXIS : CNV. CHARGE FAULT/INV.
DB
1 PSM: The backup charge circuit for the DC link is abnormal.
2 PSMR: The backup charge circuit for the DC link is abnormal.
3 α series SVU: The dynamic brake circuit is abnormal.
443 n AXIS : CNV. COOLING FAN
FAILURE
1 PSM: The fan for the internal mixer is faulty.
2 PSMR: The fan for the internal mixer is faulty.
3 β series SVU: The fan for the internal mixer is faulty.
444 n AXIS : INV. COOLING FAN
FAILURE
SVM: The fan for the internal mixer is faulty.
445 n AXIS : SOFT DISCONNECT
ALARM
The digital servo software detected a broken wire in the pulse coder.
446 n AXIS : HARD DISCONNECT
ALARM
A broken wire in the built–in pulse coder was detected by hardware.
447 n AXIS : HARD DISCONNECT (EXT) A broken wire in the separate detector was detected by hardware.
448 n AXIS : UNMATCHED FEEDBACK
ALARM
The feedback from the built–in pulse coder and that from the separate
detector are opposite in sign.
449 n AXIS : INV. IPM ALARM 1 SVM: The intelligent power module (IPM) has detected an alarm.
2 α series SVU: The IPM has detected an alarm.
460 n AXIS : FSSB DISCONNECT FSSB communication was disconnected suddenly. The possible
causes are as follows:
1) The FSSB communication cable was disconnected or broken.
2) The power to the amplifier was turned off suddenly.
3) A low–voltage alarm was issued by the amplifier.
461 n AXIS : ILLEGAL AMP INTERFACE The axes of the 2–axis amplifier were assigned to the fast type interface.
462 n AXIS : SEND CNC DATA FAILED Because of an FSSB communication error, a slave could not receive
correct data. See Chapter 7.
463 n AXIS : SEND SLAVE DATA
FAILED
Because of an FSSB communication error, the servo system could not
receive correct data. See Chapter 7.
464 n AXIS : WRITE ID DATA FAILED An attempt was made to write maintenance information on the amplifier
maintenance screen, but it failed.
465 n AXIS : READ ID DATA FAILED At power–up, amplifier initial ID information could not be read.
466 n AXIS : MOTOR/AMP
COMBINATION
The maximum current rating for the amplifier does not match that for the
motor.