FANUC Series 16/18/160/180-Model C Machining Center Operators Manual

APPENDIX
G. ALARM LIST
B–62764EN/01
894
4) Serial pulse coder (SPC) alarms
When either of the following alarms is issued, a possible cause is a faulty serial pulse coder or cable.
Number Message Contents
350 SPC ALARM: n AXIS PULSE COD-
ER
The n axis (axis 1–8) pulse coder has a fault. Refer to diagnosis display
No. 202 for details.
351 SPC ALARM: n AXIS COMMUNICA-
TION
n axis (axis 1–8) serial pulse coder communication error (data transmis-
sion fault)
Refer to diagnosis display No. 203 for details.
The details of serial pulse coder alarm No. 350 (pulse coder alarm) are
displayed in the diagnosis display (No. 202) as shown below.
#7 #6 #5 #4 #3 #2 #1 #0
CSA
BLA PHA RCA BZA CKA SPH202
CSA : The serial pulse coder is defective. Replace it.
BLA : The battery voltage is low. Replace the batteries. This alarm
has nothing to do with alarm No. 350 (serial pulse coder alarm).
SPH : The serial pulse coder or feedback cable is defective. Replace
the serial pulse coder or cable.
RCA: The serial pulse coder is defective. Replace it.
BZA : The pulse coder was supplied with power for the first time.
Make sure that the batteries are connected.
Turn the power off, then turn it on again and perform a reference
position return. This alarm has nothing to do with alarm No. 350
(serial pulse coder alarm).
CKA: The serial pulse coder is defective. Replace it.
PHA : The serial pulse coder or feedback cable is defective. replace the
serial pulse coder or cable.
The details of serial pulse coder alarm No. 351 (communication alarm)
are displayed in the diagnosis display (No. 203) as shown below.
#7 #6 #5 #4 #3 #2 #1 #0
DTE
CRC
STB PRM203
DTE : The serial pulse coder encountered a communication error.
The pulse coder, feedbak cable, or feedback receiver circuit
is defective. Replace the pulse coder, feedback cable, or
NC–axis board
CRC: The serial pulse coder encountered a communication error.
The pulse coder, feedback cable, or feedback receiver circuit
is defective. Replace the pulse coder, feedback cable, or
NC–axis board.
STB : the serial pulse coder encountered a communication error.
The pulse coder, feedback cable, or feedback receiver circuit
is defective.
Replace the pulse coder, feedback cable, or NC–axis board.
PRM: An invalid parameter was found. Alarm No. 417 (invalid servo
parameter) is also issued.
D The details of serial
pulse coder alarm
No.350
D The details of serial
pulse coder alarm
No.351

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