Fanuc 7115 Alarm < EXTENDED >

In plain English: The control has read a word of G-code that it does not recognize.

Think of it like trying to use a French word in an English sentence. The CNC’s parser expects a valid G-code (e.g., G01, G81, M03), but instead, it found something that doesn’t exist in its library for that specific model. fanuc 7115 alarm

The "7115" typically points to an illegal G-code or miscellaneous function in the currently executing block. In plain English: The control has read a

Machine: FANUC 31i-A5 on a 5-axis mill. Symptom: Intermittent 7115 alarm only when the operator opened the safety door. Diagnosis: The I/O Link daisy-chained through a safety relay. The last I/O unit (at the pendant) had a loose terminator plug. Vibration from the door opening caused a momentary open circuit. Solution: Reseated the I/O Link terminator and tightened the screws. Replaced the low-quality terminator with a genuine FANUC part (A03B-0807-K001). The "7115" typically points to an illegal G-code

If the hardware checks out, the ladder is likely corrupted.