FANUC Alarm APSH-115 — WARN can't read signal …
Manufacturer wording — WARN can't read signal %s
The manual prints placeholders; your controller fills them in with the real group, axis or number.
FANUC APSH-115 (“WARN can't read signal …”): The READ IO MACRO was called but the signal could not be found. First check: Check the MACRO call in the TP program.
Updated 2026-09-17 · LogrobotLM reference
Description
The READ IO MACRO was called but the signal could not be found. READ IO(signal name string, integer register number)
Remedy
Check the MACRO call in the TP program.
Related codes
Indicative field information — the robot manufacturer's manual and safety procedures always prevail. Never bypass a safety device; apply lockout/tagout (LOTO) before any physical intervention. How this reference is built →