Old Hand Fault Finder

Allen-Bradley PowerFlex 525 F029: Analog In Loss

What it means An analog input that is set to fault on signal loss lost its signal.

✓ Checked against the manual (Oct 2026): meaning and actions match the official fault table. Manual page.

Likely causes

  • Broken 4-20 mA or 0-10 V wire
  • Failed transmitter
  • Loss setting (t094 or t097) not what you expect

Checks, in order

  1. Check for broken or loose connections at the inputs
  2. Measure the signal at the terminals
  3. Check t094 and t097

Source

Source (reworded, not copied): Rockwell Automation, PowerFlex 520-Series AC Drives User Manual, publication 520-UM001O-EN-E (September 2025), Chapter 4 Troubleshooting, PDF page 161. Official manual (PDF). Fault numbers and names can differ between firmware versions.