F71

Net Loss

Allen-Bradley · PowerFlex 4M Adjustable Frequency AC Drive

What does F71 mean?

The drive has lost communication with its external network adapter or the network itself has failed. This means the drive is no longer receiving commands or transmitting status via the network, preventing remote control and monitoring.

Complete Troubleshooting Guide

  1. 1

    Cycle power to the drive and the associated network components to attempt a network re-initialization.

  2. 2

    Inspect all communication cabling connected to the drive's network port for damage, loose connections, or improper termination.

  3. 3

    Verify the settings of the network adapter (if external) and the drive's communication parameters (e.g., C301-C307) match the network configuration.

  4. 4

    Check the status of the external communication network using appropriate network diagnostic tools or by observing other devices on the network.