G. ALARM LIST
924 SERVO MODULE SETTING ER-
The digital servo module is not installed.
Check that the servo control module or servo interface module on the
main CPU or option 2 board is mounted securely.
926 SERVO ALARM (1/2/3/4/5/6 AXIS) Servo alarm (first to sixth axis). A RAM parity error in the servo mod-
ule or a watchdog alarm has occurred. Replace the servo control
module on the main CPU board.
930 CPU INTERRUPUT CPU error (abnormal interrupt)
The main CPU board is faulty.
950 PMC SYSTEM ALARM Fault occurred in the PMC. The PMC control module on the main
CPU board or option 3 board may be faulty.
951 PMC–RC WATCH DOG ALARM Fault occurred in the PMC–RC (watchdog alarm).Option 3 board may
970 NMI OCCURRED IN BOC RAM parity error or NMI occurred in the PMC–RB or PMC–RA2 mod-
971 NMI OCCURRED IN SLC An alarm condition occurred in the interface with an I/O unit. For
PMC–RA and PMC–RB, check that the PMC control module on the
main CPU board is connected to the I/O unit securely. For PMC–RC,
check that the PMC control module on the option 3 board is con-
nected to the I/O unit is supplied with power and that the interface
module is intact.
972 NMI OCCURRED IN OTHER MOD-
NMI occurred in a board other than the main CPU board.
973 NON MASK INTERRUPT NMI occurred for an unknown reason.
974 F–BUS ERROR BUS error of FANUC BUS.
The main CPU board or option 1 to 3 boards may be faulty.
975 BUS ERROR (MAIN) Main CPU board bus error.
The main CPU board may be faulty.
11) Alarms Displayed on spindle Servo Unit
Meaning Description Remedy
Program ROM abnormality
Detects that control program is not started (due to
program ROM not installed, etc.)
Install normal program
Detects motor speed exceeding specified speed
Check load status.
Cool motor then reset
AL02 Excessive speed deviation Detects motor speed exceeding specified speed
Check load status.
AL03 DC link section fuse blown Detects that fuse F4 in DC link section is blown
(models 30S and 40S).
Check power transistors,
and so forth.
AL04 Input fuse blown.
Input power open phase.
Detects blown fuse (F1 to F3), open phase or mo-
mentary failure of power (models 30S and 40S).
Check open phase and
power supply refenerative
AL05 Control power supply fuse
Detects that control power supply fuse AF2 or AF3
is blown (models 30S and 40S).
Check for control power
supply short circuit .
AL–07 Excessive speed Detects that motor rotation has exceeded 115% of
its rated speed.
AL–08 High input voltage Detects that switch is flipped to 200 VAC when
input voltage is 230 VAC or higher (models 30S
Flip switch to 230 VAC.