Robotics in Manufacturing
SRVO-481

SRVO-481: Invalid payload number

The collaborative robot's current payload number is invalid - and here's the gotcha that catches nearly every new cobot install: the default payload number is 0, which is deliberately invalid.

What it means

The collaborative robot's current payload number is invalid - and here's the gotcha that catches nearly every new cobot install: the default payload number is 0, which is deliberately invalid. The robot refuses to run until you tell it what it's carrying, because a cobot's contact-stop sensitivity is only as good as its payload data.

Common causes

Ranked by what technicians most often find, most likely first.

  1. Payload number still at the factory default of 0 - nobody set it during commissioning.
  2. Program selecting a payload schedule that was never configured.

How to fix it

  1. Set the payload number to a configured schedule between 1 and 10 (and make sure that schedule's mass/CG data reflects the real tooling). This isn't bureaucracy - collaborative force limits are computed against this data.

Quick facts

Category
Servo
Affected series
R-30iB Plus / Mate Plus (collaborative CR/CRX systems)
Alarm family
SRVO

Related codes

Verified against FANUC documentation (B-83284EN-1).Last reviewed: 2026-07-09.Editorial process