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ErrorLib — Industrial Fault Code Library

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78

Flux Amps Reference Range

Allen-Bradley · PowerFlex 700

What does 78 mean?

The value for flux amps determined by the Autotune procedure exceeds the programmed [Motor NP FLA] parameter. This indicates a discrepancy between the motor's actual flux current characteristics and the configured nameplate full load amperage, possibly due to incorrect motor data entry or an improperly sized motor.

Common Causes

  • Calculated flux current reference is outside acceptable limits.
  • Motor model parameters (e.g., P2-xx) are incorrect.
  • Stator resistance estimation failure.
  • Low motor terminal voltage during operation.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Reprogram [Motor NP FLA] parameter with the correct motor nameplate Full Load Amperage value.

  2. 2

    Repeat the Autotune procedure.

Browse all codes in this manual (49)
Verified technical data. Last updated: April 2026

Related Faults

100Parameter Checksum Error101UserSet1 Chksum102UserSet2 Chksum
Source: Allen-Bradley PowerFlex 700
Open Manual (Page 85)Search more codes in this manual