Fanuc Power Mate i-D/H Maintenance Manual

B63175EN/03
7. TROUBLESHOOTING
461
This section explains the following FSSB alarms:
Alarm No. Alarm message Description
926 FSSB ALARM System alarm related to FSSB
462 n AXIS : SEND CNC DATA
FAILED
Because of an FSSB
communication error, the slave
cannot receive correct data.
463 n AXIS : SEND SLAVE DATA
FAILED
Because of an FSSB
communication error, the CNC
cannot receive correct data.
5136 FSSB : NUMBER OF AMPS IS
SMALL
The number of the amplifiers
recognized by FSSB is less than
the set number of controlled axes.
A faulty location is determined from the LEDs on the amplifiers.
Alternatively, it is determined from the screen displayed on the CNC.
(1)Determining a faulty location from the LEDs on the amplifiers
Servo amplifiers are connected to the CNC through FSSB as follows:
AB
CNC
Amplifier
0 1 2 3 4 5
Amplifier Amplifier Amplifier Amplifier Amplifier
Suppose that a defect exists within the dotted box A. Then, the LEDs on
the amplifiers are indicated as follows:
Amplifier No. Amplifier 0 Amplifier 1 Amplifier 2 Amplifier 3 Amplifier 4 Amplifier 5
LED indication L or U U U
In this case, the possible faulty location is as follows:
1) The optical cable connected at a portion where the amplifier LED
indication changes from L or to U is faulty (portion A in the above
figure). Alternatively, one of the amplifiers connected by that optical
cable (amplifier 2 or 3 in the above figure) is faulty.
Suppose that a defect exists within the dotted box B. Then, the LEDs on
the amplifiers are indicated as follows:
Amplifier No. Amplifier 0 Amplifier 1 Amplifier 2 Amplifier 3 Amplifier 4 Amplifier 5
LED indication indicated for all amplifiers or U for all amplifiers
In this case, the possible faulty location is as follows:
1) If the LEDs on all amplifiers indicate or U, the first optical cable that
is connected to the CNC (portion B in the above figure) is faulty.
Alternatively, the first amplifier that is connected to the CNC
(amplifier 0 in the above figure) or the axis control card in the CNC
is faulty.
7.39
FSSB ALARMS
FSSB alarms
Required action for
alarms
D Required action for
alarm 926

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