Robotics in Manufacturing
MOTN-175

MOTN-175: Failed to Become Master

The robot couldn't take on the master role for the requested operation.

What it means

The robot couldn't take on the master role for the requested operation. Either the setup or program group mask is wrong, or the robot was still in motion when the operation was attempted.

Common causes

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

  1. Incorrect group mask configured in the program
  2. Setup data that doesn't match the requested operation
  3. The robot was still moving when the operation was attempted

How to fix it

  1. Confirm the setup data matches the operation you're attempting.
  2. Verify the group mask in the program is correct.
  3. Retry the operation.

Quick facts

Category
Motion
Affected series
R-30iB; R-30iB Mate; R-30iB Plus; R-30iB Mate Plus
Alarm family
MOTN

Verified against FANUC documentation (B-83284EN-1).Last reviewed: 2026-07-12.Editorial process