
6
6.2 Stand–Alone Type i Series Hardware
202
• 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
detected.
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
detected.
NOTE1 If any of the system alarms occurs, the hardware may be defective.
NOTE2 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