Fanuc Alarm Code
Fanuc alarms are essentially the FANUC CNC producing errors due to hardware, software faults or the execution of programs. There are many different alarms produced on the many series of Fanuc controls from the late 1970’s to current drives and controls.
System ALM errors
Drive Faults for Servo, Spindle and PSM
Pulse coder (Absolute APC) & (Serial SPC) codes
Overtravel ALM (OT)
Program errors (P/S alarm)
Being involved with Fanuc for decades we have always thought better to list SYSTEMS, drives, comms, and functional errors seperately.
Fanuc drives, systems alarm using lit LED’s or alphanumeric characters.
Below is a fanuc error codes list by drives and system. If anything is missing please contact us for more information.
Fanuc Drives & ALPHA module alarms:
- FANUC ALPHA spindle module & aiSP (SPM, SPMi / aiSP)
- Special mention: Spindle Amplifier: ALARM 12
- Special mention: Spindle Amplifier: ALARM 31
- FANUC ALPHA Servo module & aiSV (SVM, SVU, aiSV)
- Special mention: Servo amplifier: ALARMS 8 / 9 / A
- Special mention: Servo amplifier: ALARM 6 / b
- FANUC ALPHA Power supply & aiPS codes (PSM, aiPS)
- Special mention: Power Module: ALARM 01
- FANUC BETA faults (only servo) (bSVU, biSV)
- FANUC BETA biSVSP error codes (biSVSP / biSMVP)
- Fanuc DC Axis faults (6047)
- Fanuc AC Axis faults (6050, 6057)
- Fanuc AC Servo alarms (6058, 6066)
- Fanuc AC spindle drive fault codes (6044, 6055, 6059, 6060, 6063, 6064)
Fanuc System alarm list (basic summary):
- Fanuc series ZERO, 0, 0M, 0T codes.
- Fanuc 6, 6M, 6T errors
- Fanuc 10 & 11 ALM – 10 & 11 master pcb error codes
- Fanuc 15 codes
- Fanuc 16 / 18 / 21 system codes.
- Fanuc 16i / 18i / 21i error code.
Common Alarms on Fanuc Controls:
- Alarm 351 Serial Comms (Encoder).
- Alarm 368/369 Error (FSSB communication).
- Alarm 401 (VRDY off).
- Alarm 701 (Fan alarm).
- Alarm 911 (Ram Parity High).
- Alarm 920 (Servo stop).
- Alarm 926 (FSSB error).
- Alarm 930 (CPU stop).
- Alarm 972 (NMI mask).
P/S Faults / Program Errors (Common on Fanuc Controls)
- PS84 & PS85 (RS232 issues)
- PS101
- PS100 (Memory loss)
Error codes and alarms produced on Fanuc amplifiers, system, power supply units and modules, I/O racks operating the PLC side of the CNC are extensive. They do take time to understand and unfortunately our lists will never negate the need for a quality CNC maintanence engineer to visit site and diagnose and solve faults on your machine(s).
CNC are Fanuc specialists: Parts – Exchange – Repair – Test – Surplus
- Exchange -> Emergency breakdowns; swap the bad for the good immediately. Order Monday to Friday 9am to 4.30PM to ship same day!
- Repair -> Save money avoid paying deposit, keeping your own unit with known history. Current clean, inspect, repair and test turnaround 24-48 hours (normal).
- Surplus -> Either for stock critical parts or for drives that are not repairable or exchangeable due to burn outs, corrosion, etc.