oL4

Overtorque 2

Yaskawa · J1000 AC Drive

What does oL4 mean?

The drive's output current (or calculated torque in OLV, CLV, AOLV/PM, CLV/PM modes) has exceeded the threshold set in L6-05 for longer than the time specified in L6-06. Similar to Overtorque 1, this suggests either parameter misconfiguration or a significant mechanical overload on the driven equipment. Sustained overtorque conditions can result in mechanical stress, equipment damage, or shortened lifespan of motor and machine components.

Complete Troubleshooting Guide

  1. 1

    Verify and adjust parameters L6-05 (Overtorque 2 Detection Level) and L6-06 (Overtorque 2 Detection Time) to suit the operational needs and protect the system.

  2. 2

    Inspect the driven machine for mechanical faults, such as excessive friction, misalignment, or jamming, and remove the cause of the fault before restarting.

Source: Yaskawa Manual