F111
Safety Hardware
Allen-Bradley · PowerFlex 520-series Adjustable Frequency AC Drive
What does F111 mean?
A malfunction in the safety input enable hardware has been detected, specifically that one of the required safety inputs (S1 or S2) is not enabled. This indicates a problem within the drive's integrated safety circuit or incorrect external safety wiring, preventing safe operation.
Additional Steps
Steps 1–2 are listed in Priority Fix.
- 3
Inspect wiring to the safety inputs for breaks, loose connections, or damage.
- 4
If the fault persists after verifying inputs and jumpers, replace the control module as the safety hardware may be internally faulty.
Source: Allen-Bradley PowerFlex 520-series Adjustable Frequency AC Drive
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