
B–64115EN/01
8. TROUBLESHOOTING
487
If the pattern of the STATUS information is A
(1)The optical cable that connects together the slave corresponding to bits
12 to 15 of the MODE information and the preceding slave may be
defective. Or, either of the slaves connected together with that optical
cable may be defective.
(2)The voltage of the power supplied to the slave amplifier dropped, or
a power fault occurred in the amplifier.
(3)Any of the axis control cards in the CNC may be defective.
If the pattern of the STATUS information is B
(1)The optical cable that connects together the slave corresponding to bits
12 to 15 of the MODE information and the preceding slave may be
defective. Or, either of the slaves connected together with that optical
cable may be defective.
(2)The voltage of the power supplied to the slave amplifier dropped, or
a power fault occurred in the amplifier.
If the pattern of the STATUS information is C
(1)The slave corresponding to bits 12 to 15 of the MODE information
may be defective.
(2)The voltage of the power supplied to the slave amplifier dropped, or
a power fault occurred in the amplifier.
If a power fault occurs in a servo amplifier, the FSSB alarm is issued. A
power fault occurs, causing the FSSB alarm to be issued, if the amplifier
control power supply voltage drops, if the +5 V conductor of the pulse
coder cable is ground, or for other reasons.
If any of the axis control cards are found defective because of the above
diagnosis, replace the axis control card on the main board.
See Section 8.14 for explanations about the mounting location of the axis
control card.
D Power fault in a servo
amplifier
D Replacing the axis
control card