Fanuc Servo Alarm List

Below is a list for your fanuc servo alarm more easily in the repair of CNC machine. For more detail you can open the manual book CNC Machining



ALARM on PCB

RAM Parity Alarm : AL-16

ROM Parity Alarm : AL-18

A/D Converter : AL- 19, 20

SIC LSI : AL- 32, 52, 53

CPU Test Alarm : AL- 74, 75

Initial Test Alarm : AL- 79



ALARM on PSM

Overvoltage in DC Link : AL-11

Undervoltage in DC Link : AL-51

Undervoltage in PCB : AL-b1

Input Circuit Overcurrent : AL-30

Insufficient charging in DC: AL-33

Regenerative Energy : AL-57, b2

Over load : AL-58

Stop of Cooling Fan : AL-59

Other Alarm : AL-98



ALARM on SPM

DC Link Fuse Blow :AL-03

Excessive load (OH) : AL- 09

Overcurrent in DC Link : AL- 12

Stop of Cooling Fan : AL-56

Stop of Cooling Fan : AL-88

Insufficient charging in DC : AL-97



ALARM for SENSOR

Excessive Speed : AL-02

: AL-07

Temperature : AL-06

Position Sensor Polar : AL-21

Position Coder : AL-27, 41, 42, 46, 47

Motor Sensor : AL- 73, 81, 82, 83

Spindle Sensor : AL-84, 85, 86, 87

Differential mode : AL-43, 49

Common alarm : AL-31



ALARM on Motor and Other

Motor overheat : AL-01

Switch Circuit : AL-15, 55

Short Time Over Load : AL-29

Over Load : AL-54

Position Deviation Error : AL-36

Energy of Back EMF : AL-b3

Parameter Miss Setting : AL-34, 35, 37

: AL-49, 50, 57



Communication ALARM

Communication with CNC : AL-24

Amp : AL-66

Amp-Module : AL-b0

Communication Data Alarm : AL-C0, C1, C2

Are you interested in my other articles Fanuc Parameter Backup.

How to Backup Data Fanuc Machine With PC - Using Software V24

The first parameter settings on the PC:

Baud rate = 4800

Data bits = 7 bits

Stop bits = 1 bit

Parity = Even

Handshake = XON / XOFF

Extension data = dat

Can you see in the image beside

The second setting on CNC machines:

Can you look at previous posts Fanuc Parameter Data Backup in adapted to the type of control of each machine.

Furthermore, if all has been done setting for both we can jump right in, ready to make a new folder to store data such as programs, offsets, parameters, diagnostics. Open software v24 and then select the Driver / Path change locate the folder you created (can be viewed in the figure). Select Receive for downloading data. Once ready to go to the machine select EDIT mode.

To backup program press O-9999 and press the output (type OM)

EOB key parameters and output, if only the output only to 900 parameters can not be downloaded. Diagnostic you can simply press button output .

Maybe that's all that I can share or you are interested in my other article Fanuc Alarm 300 or Fanuc Alarm 438.