Safety Hardware

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.

• One or both of the required safety input signals (e.g., S1, S2) are not active (e.g., open circuit) when safe torque off (STO) is not intended.
• External safety circuit (e.g., safety relay, light curtain, emergency stop button) has tripped or is improperly wired to the drive's safety inputs.
• Incorrect configuration of drive safety parameters (e.g., P33-00 to P33-05) related to STO functionality.
• Break in the wiring of the safety input channels (S1 or S2) to the drive, or a loose terminal connection.
• Internal failure of the drive's integrated safety circuit (e.g., dual-channel monitoring logic).

Click steps to track your progress.

1. 1

   1. Measure the voltage across safety input terminals S1 and SCOM, and S2 and SCOM (e.g., 24VDC for active, 0VDC for inactive) to confirm their state.

2. 2

   2. Inspect the external safety circuit for any tripped devices (e.g., E-stop button engaged, safety gate open, safety relay de-energized).

3. 3

   3. Verify continuity of the wiring from the external safety devices to the drive's safety input terminals (S1, S2, SCOM) using a multimeter.

4. 4

   4. Confirm that drive safety parameters (e.g., P33-00 "STO Enable") are configured correctly for the application (e.g., set to "Enabled" if using STO).

5. 5

   5. If the drive has diagnostic LEDs for safety inputs, observe their status to pinpoint which channel (S1 or S2) is not enabled.