
D LED display when a system alarm occurs j: Off J: On l: Blink
(if CPU card A20B–3300–031X is used)
ALARM jJj System failure. The software detected an error and
stopped the system.
ALARM JJj An error occurred on the local bus in the main CPU
board.
ALARM jjJ System emergency. The hardware detected an error.
ALARM JlJ A disconnection was found in the optical
fiber cable between the CNC and LCD.
Alternatively, a printed circuit board on the
LCD side is defective.
If a disconnection occurs, the dot of the
7–segment LED is also lit.
If a disconnection occurs, the display of the
LCD unit blinks.
ALARM jJJ An SRAM parity error or SRAM ECC error was de-
tected.
ALARM JJJ A DRAM parity was detected.
ALARM lll A bus error occurred in the main CPU.
(If CPU card A20B–3300–029X is used)
ALARM jJj System failure. The software detected an error and
stopped the system.
ALARM JJj An error occurred on the local bus in the main CPU
board.
Alternatively, a bus error occurred in the main CPU.
Alternatively, a DRAM parity error was detected.
ALARM jjJ System emergency. The hardware detected an error.
Alternatively, a bus error occurred in the main CPU.
Alternatively, a DRAM parity error was detected.
ALARM JjJ A disconnection was found in the optical
fiber cable between the CNC and LCD.
Alternatively, a printed circuit board on the
LCD side is defective.
If a disconnection occurs, the dot of the
7–segment LED is also lit.
If a disconnection occurs, the display of the
LCD unit blinks.
ALARM jJJ An SRAM parity error or SRAM ECC error was de-
tected.
NOTE
1 If any of the system alarms occurs, the hardware may be
defective.
2 If a disconnection is detected in the optical fiber cable
between CNC and LCD at power–up, the ALARM LEDs
alternately display these patterns: JjJ ³ jJj
4. STAND–ALONE TYPE i SERIES HARDWARE
GFKE-0222-EN
286