
8. ALARM LIST
495
8.1.2 Background edit alarms (BP/S alarm)
No. Message Contents
??? BP/S alarm BP/S alarm occurs in the same number as
the P/S alarm that occurs in ordinary pro-
gram edit. (ALM70– 74, 85–87, etc.)
140 BP/S alarm It was attempted to select or delete in the
background a program being selected in
the foreground. Use background editing
correctly.
NOTE Alarm in background edit is displayed in the key input line of the
background edit screen instead of the ordinary alarm screen and
is resettable by any of the MDI key operation.
8.1.3 Absolute pulse coder (APC) alarms
No. Message Contents
300 APC Alarm : nth–axis origin
return
Manual reference position return is re-
quired for the nth–axis (n=1 to 8).
301 APC alarm: nth–axis
communication
nth–axis (n=1 to 8) APC communication er-
ror. Failure in data transmission. Possible
causes include a faulty APC, cable, or ser-
vo interface module.
302 APC alarm: nth–axis over
time
nth–axis (n=1 to 8) APC overtime error.
Failure in data transmission. Possible
causes include a faulty APC, cable, or ser-
vo interface module.
303 APC alarm: nth–axis framing nth–axis (n=1 to 8) APC framing error. Fail-
ure in data transmission. Possible causes
include a faulty APC, cable, or servo inter-
face module.
304 APC alarm: nth–axis parity nth–axis (n=1 to 8) APC parity error. Fail-
ure in data transmission. Possible causes
include a faulty APC, cable, or servo inter-
face module.
305 APC alarm: nth–axis pulse
error
nth–axis (n=1 to 8) APC pulse error alarm.
APC alarm. APC or cable may be faulty.
306 APC alarm: nth–axis battery
voltage 0
nth–axis (n=1 to 8) APC battery voltage
has decreased to a low level so that the
data cannot be held. APC alarm. Battery or
cable may be faulty.
307 APC alarm: nth–axis battery
low 1
nth–axis (n=1 to 8) axis APC battery volt-
age reaches a level where the battery must
be renewed. APC alarm. Replace the bat-
tery.
308 APC alarm: nth–axis battery
low 2
nth–axis (n=1 to 8) APC battery voltage
has reached a level where the battery must
be renewed (including when power is OFF).
APC alarm .Replace battery.
309 APC ALARM:
n AXIS ZRN IMPOSSIBL
Return to the origin has been attempted
without first rotating the motor one or more
times. Before returning to the origin, rotate
the motor one or more times then turn off
the power.