Fanuc Alarm 002: TV PARITY ALARM

Fanuc Alarm 6: ILLEGAL USE OF NEGATIVE SIGN Fanus Control Model: Series 0 (0-M, 0-T, 0-Mate, 0i-A/B/C/D), Series 10 / 11 / 12, Series 16 / 18 / 21 Description If the programmer enters an invalid value in the G-code, such as adding a negative sign to the tool number (T) or spindle speed (S),…

In the world of CNC machining, encountering a FANUC 401 Alarm can bring production to a grinding halt. This specific error is one of the most common—yet occasionally frustrating—faults found in FANUC Alpha and Beta series drive systems. Specifically, the 401 alarm stands for “V-Ready Off.” In simpler terms, the CNC control is expecting the…

Fanuc Alarm PS123: Missing END Statement Fanus Control Model: Series 0i, 16i, 18i, 21i, and 30i/31i/32i controls Description When you forget to write END at the end of a program using commands like `WHILE` or `IF` in a macro program, the CNC system gets confused and generates an alarm. How to Fix Alarm Go into…

Fanuc Alarm PS001: TH PARITY ALARM Fanus Control Model: Series 0 (0-M, 0-T, 0-MC, etc.), Series 0i / 16i / 18i / 21i Description This alarm indicates a technical fault when the information exchange between the inverter’s internal control board and the sensors is not correct. Another reason could be a fault in the system parameters or…

Fanuc Alarm 137: M-CODE & MOVE CMD IN SAME BLK Fanus Control Model: 0 (0-M, 0-T, 0-i) Description An M-code (which is a machine function such as spindle on/off or coolant control) and a ‘Move Command’ (such as X, Y, or Z axis movement) have been combined in a way that is prohibited by Fanuc…

Fanuc Alarm PS017 ILLEGAL MODE FOR GOTO/WHILE/DO Fanus Control Model: 10/11/12/15/15i Description This alarm appears when the control system has difficulty executing these macro statements such as GOTO, WHILE, or DO. Does your CNC controller accept these specific commands or is there a fundamental error in the program logic that violates the prevailing rules of…