Start-Up prevention

What does F26 mean?

The drive's startup sequence has been prevented, possibly because a run request was active while a new application was being loaded. This is a safety measure to prevent unintended operation during critical configuration changes.

• A run command (e.g., digital input DI1 active, fieldbus run bit set) is present during a sensitive operation like parameter initialization or firmware update.
• The drive is attempting to load a new application or perform a factory reset while a run request is active.
• Incorrect parameter settings (e.g., P16-01 'Start-up mode') that conflict with current operational state.
• Safety interlock active (e.g., STO input open) despite a run command being issued, preventing actual motor rotation but still causing a 'prevention' state.
• Fieldbus communication issue where a run command is latched or incorrectly interpreted during startup.

Click steps to track your progress.

1. 1

   Ensure all run commands (e.g., digital input DI1, fieldbus run bit, keypad start button) are deselected or inactive before attempting to power cycle or initialize the drive.

2. 2

   Verify that no parameters are being written or application programs loaded while a run request is present. Complete any configuration changes first.

3. 3

   Check the status of safety functions (e.g., Safe Torque Off - STO inputs). Ensure STO is clear if a run command is expected to initiate motor operation.

4. 4

   Review drive parameter settings related to startup and control mode (e.g., P16-01 'Start-up mode', P20-01 'Control Mode'). Adjust as necessary.

5. 5

   Power cycle the drive (off, wait, on) without any active run commands, then apply the run command after the drive has fully initialized.