Safety Open

What does F059 mean?

Both of the drive's safety inputs (Safety 1 and Safety 2) are not enabled, indicating an open condition in the external safety circuit. This fault signals that the drive's integrated safety function detects an unsafe state, preventing motor operation until the safety inputs are properly closed and secure.

• External safety circuit (e.g., emergency stop button, safety gate switch, light curtain) in an open state, preventing both Safety 1 and Safety 2 inputs from being asserted.
• Broken safety wiring or loose connections to the drive's Safety 1 (Terminal S1) and Safety 2 (Terminal S2) input terminals.
• Loss of 24VDC power supply to the external safety circuit or to the safety input terminals themselves.
• Faulty external safety monitoring device (e.g., safety relay, PLC safety module) failing to provide the necessary closed state to the drive inputs.
• Improper configuration of the drive's safety function parameters (e.g., P3-01 through P3-09) not matching the physical safety circuit.

Click steps to track your progress.

1. 1

   Verify the state of all external safety devices (e-stops, light curtains, gate switches) in the safety chain; ensure they are all in their "safe" (closed) operating state.

2. 2

   Measure the voltage at the drive's Safety 1 (Terminal S1) and Safety 2 (Terminal S2) input terminals relative to Safety Common (Terminal SC). Both should show 24VDC when the safety circuit is active.

3. 3

   Inspect all safety wiring for damage, breaks, or loose connections from the safety devices back to the drive's safety input terminals.

4. 4

   If using an external safety relay, verify its status indicators show a "safe" (reset) state and its output contacts are closed.

5. 5

   Check the 24VDC power supply feeding the safety circuit for proper voltage output and stability.

6. 6

   Review drive parameters related to safety (e.g., P3-01 Safe-Off Mode, P3-02 Safe-Off Input Select) to ensure they are configured correctly for the installed safety system.