
APPENDIXG. ALARM LIST
B–63084EN/02
732
Number ContentsMessage
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 sign of feedback data from the built–in pulse coder differs from that
of feedback data from the separate detector.
449 n AXIS : INV. IPM ALARM 1) SVM: IPM (intelligent power module) detected an alarm.
2) α series SVU: IPM (intelligent power module) 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.
463 n AXIS : SEND SLAVE DATA
FAILED
Because of an FSSB communication error, the servo system could not
receive correct data.
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.
467 n AXIS : ILLEGAL SETTING OF
AXIS
The servo function for the following has not been enabled when an axis
occupying a single DSP (corresponding to two ordinary axes) is speci-
fied on the axis setting screen.
1. Learning control (bit 5 of parameter No. 2008 = 1)
2. High–speed current loop (bit 0 of parameter No. 2004 = 1)
3. High–speed interface axis (bit 4 of parameter No. 2005 = 1)
The details of servo alarm are displayed in the diagnosis display (No. 200
and No.204) as shown below.
#7
OVL200
#6
LV
#5
OVC
#4
HCA
#3
HVA
#2
DCA
#1
FBA
#0
OFA
#7 (OVL) : An overload alarm is being generated.
#6 (LV) : A low voltage alarm is being generated in servo amp.
#5 (OVC) : A overcurrent alarm is being generated inside of digital servo.
#4 (HCA) : An abnormal current alarm is being generated in servo amp.
#3 (HVA) : An overvoltage alarm is being generated in servo amp.
#2 (DCA) : A regenerative discharge circuit alarm is being generated in servo amp.
#1 (FBA) : A disconnection alarm is being generated.
#0 (OFA) : An overflow alarm is being generated inside of digital servo.
D Details of servo alarm