B–64113EN–1/01
1. AXIS CONTROL
73
Number Message Description
456 ILLEGAL CURRENT
LOOP
The current control cycle settings (pa-
rameter No. 2004, bit 0 of parameter
No. 2003, and bit 0 of parameter No.
2013) are incorrect. Possible problems
are as follows.
– For the two axes whose servo axis
numbers (settings of parameter No.
1023) are an odd number followed
by an even number (a pair of axes
1 and 2, for example), a different
current control cycle is set for each
of the axes.
– The requirements for slaves need-
ed for the set current control cycle,
including the number, type, and
connection method of them, are not
satisfied.
457 ILLEGAL HI HRV (250US) Use of high–speed HRV is specified al-
though the current control cycle is 200
µs.
458 CURRENT LOOP
ERROR
The current control cycle setting does
not match the actual current control
cycle.
459 HI HRV SETTING
ERROR
For the two axes whose servo axis num-
bers (settings of parameter No. 1023) are
an odd number followed by an even
number (a pair of axes 1 and 2, for exam-
ple), the SVM for one of the axes sup-
ports high–speed HRV control but the
SVM for the other does not. Refer to the
SVM specification.
460 n AXIS : FSSB DISCON-
NECT
FSSB communication was interrupted.
The most likely causes are:
1. The FSSB communication cable is
disconnected or has a broken con-
ductor.
2. The amplifier power supply was
turned off.
3. A low–voltage alarm condition oc-
curred in the amplifier.
461 n AXIS : ILLEGAL AMP
INTERFACE
The fast type interface was assigned to
both axes of a two–axis amplifier.
462 n AXIS : SEND CNC
DATA FAILED
The slave could not receive data cor-
rectly because of an FSSB commu-
nication error.
463 n AXIS : SEND SLAVE
DATA FAILED
The servo section failed to receive data
correctly because of an FSSB commu-
nication error.
465 n AXIS : READ ID DATA
FAILED
An attempt to read the initial ID informa-
tion for the amplifier failed when the
power was switched on.
Alarm and message
D Servo alarms