Low battery voltage loses the absolute position memory, which then demands a fresh zero-point mastering - two jobs in one: change the battery and re-master. The best handling is not to wait for the alarm: put battery replacement into scheduled maintenance. This page lists every battery and mastering code and the recovery paths.
Low battery voltage losing the absolute position memory, which then demands a fresh zero master - two jobs in one battery pack supply -> absolute position count -> memory held across power-off -> voltage too low loses it -> re-master required
Inspection line: measure battery voltage against the replacement threshold first, then assess whether zero data is already lost
Spares we carry: we carry the model's battery pack and mastering fixtures; battery changes belong in scheduled maintenance, not in alarm response
FANUC 5
