
B–63785EN/01
7.TROUBLESHOOTING
401
Alarm message ActionCause
FSSB DISCONNECTION
(AMPn←AMPm)
Communication between
servo amplifiers n and m
cannot be established.
Replace the optical cable
that connects servo ampli-
fier or pulse module m to
servo amplifier n con-
FSSB DISCONNECFTION
(AMPn←PULSE MODULEm)
Communication between
servo amplifier n and pulse
module m cannot be es-
tablished.
nected to the axis control
card. If this does not clear
the alarm, replace servo
amplifier or pulse module
m.
FSSB DISCONNECTION
(PULSE MODULEn←AMPm)
Communication between
pulse module n and servo
amplifier m cannot be es-
tablished.
Replace the optical cable
that connects servo ampli-
fier m to pulse module n
connected to the axis con-
trol card. If this does not
clear the alarm, replace
servo amplifier m.
FSSB DISCONNECTION
(PULSE MODULE1←PULSE
MODULE2)
Communication between
the first and second pulse
modules cannot be estab-
lished.
Replace the optical cable
that connects the second
pulse module to the first
pulse module connected to
the axis control card. If
this does not clear the
alarm, replace the second
pulse module.
FSSB INTERNAL
DISCONNECTION (AMPn)
Communication cannot be
established within servo
amplifier n.
Replace servo amplifier n
connected to the axis con-
trol card.
The number of the axis control card on which the error occurred is
displayed in (2) on the screen, preceded by a # symbol.
The number can be:
#1:Axis control card mounted on the MAIN board
#2:First axis control card mounted on the additional axis board
#3:Second axis control card mounted on the additional axis board
Check the FSSB cable and the servo amplifier of the indicated axis control
card, and so on.
D Cause and action (2)