SLF2

PC Software Communication Interruption

Schneider Electric · Altivar Machine ATV320 Variable Speed Drive

What does SLF2 mean?

An interruption in communication with PC Software. This means the drive has lost its connection to a PC running configuration or monitoring software, preventing diagnostics, parameter changes, or firmware updates. This is typically a temporary issue during commissioning or maintenance.

Complete Troubleshooting Guide

  1. 1

    Check the USB/Ethernet cable connection between the PC and the drive for damage or looseness.

  2. 2

    Verify the PC software's communication settings (COM port, IP address) are correct and selected.

  3. 3

    Ensure the PC's firewall or antivirus software isn't blocking communication ports.

  4. 4

    Restart the PC software and power cycle the drive if necessary to re-establish connection.

Source: Schneider Electric Manual