Robotics in Manufacturing
MOTN-177

MOTN-177: Could Not End Synchronized Motion

The controller failed to terminate a synchronized motion operation.

What it means

The controller failed to terminate a synchronized motion operation. The program's setup data or group mask may be wrong, or the robot was still moving when the end was attempted.

Common causes

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

  1. Incorrect setup data for synchronized motion in the program.
  2. Group mask in the program does not match the configuration required for the sync motion.
  3. The robot was still in motion when the sync end was requested.

How to fix it

  1. Verify the setup data used for synchronized motion in the program is correct.
  2. Confirm the group mask in the program matches the intended motion groups.

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