Undertorque Detection 2

What does UL4 mean?

The motor current has fallen below a secondary minimum value set in L6-05 for longer than the allowable time specified in L6-06. Similar to UL3, this suggests either incorrect parameter tuning for the current load or a fault in the machine's mechanical system that is causing reduced torque.

Complete Troubleshooting Guide

1. 1

   Review and adjust the settings of parameters L6-05 (secondary minimum torque detection current) and L6-06 (secondary undertorque detection time) if different thresholds are required.

2. 2

   Inspect the mechanical load and connected equipment for any issues that could be causing a reduction in motor torque, such as binding or component failure.