Undertorque Detection 1

What does UL3 mean?

The motor current has fallen below the minimum value set for torque detection (L6-02) for longer than the allowable time (L6-03). This indicates either inappropriate parameter settings for the current load conditions or a mechanical fault on the machine side, such as a loss of load or broken coupling.

Complete Troubleshooting Guide

1. 1

   Review and adjust the settings of parameters L6-02 (minimum torque detection current) and L6-03 (allowable undertorque detection time) to match the expected load characteristics.

2. 2

   Inspect the mechanical load and transmission system for any problems, such as a broken belt, coupling, or unexpected reduction in load, that could lead to an undertorque condition.