Fanuc SYS_ALM501 SRAM DATA ERROR(BATTERY LOW DURING POWER OFF)

The system alarm screen will be transferred when the system detects a condition that does not maintain normal system action.

When entering the system alarm state, the system will:

- Disconnect the excitation of servo and spindle amplifier

- Disconnect I/O Link communication

When a system alarm occurs, it switches to the screen shown below. This screen is called the system alarm screen.





System alarms can be categorized into the following three types.

- Alarms detected by software

- Alarms detected by hardware

- Other alarms



1

Alarms detected by software

Software abnormalities are detected mainly by the CNC system software. Typical causes of abnormalities are:

- Detection of processing/data conflicts based on internal status monitoring software

- Access outside the data/command range

- Divide by zero

- Stack overflow

- Stack overflow

- DRAM sum check error

2

Alarms Detected by Hardware

Hardware anomalies are detected primarily by the hardware. Typical causes of anomalies are:

- Parity error (DRAM, SRAM, Hyper Cache)

- Bus error

- Power alarms

- FSSB cable disconnection

3

Other Alarms

Other causes are:

- Alarms detected by peripheral software

- Servo software (watchdog, etc.)

- PMC software (I/O Link communication abnormality, etc.)