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FANUC Alarm MEMO-147 — WARN Flash File access error(write)

Warning
Hardware
main board and memory
Controllers
R-J3iB / R-30iA
FANUC class
WARN
Hardware family
FANUC storage media alarms: memory card, USB, F-ROM and corrupted data

FANUC MEMO-147 (“WARN Flash File access error(write)”): The write access to the Flash File(F-ROM) failed. First check: The Flash File(F-ROM) may be broken.

Updated 2026-10-22 · LogrobotLM reference

Description

The write access to the Flash File(F-ROM) failed. Some program may be lost.

Remedy

The Flash File(F-ROM) may be broken. Create or load the lost program again.

Field diagnosis

Writing to the flash memory failed: a program may be lost.

What to check

  • The flash memory may be faulty: recreate or reload the lost program; if it happens again, the main board or its memory module must be replaced.
  • Note: Monitor the frequency: a flash memory reaching end of life produces more and more of these codes.

Related codes

MEMO-148WARN Flash File access error(read)SYST-031SYSTEM F-ROM parityMEMO-145WARN TPE cannot have KAREL routineMEMO-146WARN Invalid variable is usedMEMO-149WARN Specified program is broken

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 →