Login Failure After Logout (Too Fast)

What does Login too fast after logout mean?

A user is unable to log in to the safety CPU immediately after logging out. This issue occurs if the login attempt is performed too quickly after a previous logout, indicating a temporary lockout mechanism.

• The safety CPU has an embedded security feature that enforces a lockout period (e.g., 30 seconds) after a logout event to prevent rapid re-login attempts.
• Multiple login attempts in quick succession after a logout triggered the temporary lockout mechanism.
• Network latency or communication issues causing delayed recognition of the logout command by the CPU, resulting in a perceived "too fast" login.
• Firmware version with an overly aggressive or configurable (but currently short) lockout timer.

Click steps to track your progress.

1. 1

   After logging out, wait for at least 60 seconds before attempting to log in again to the safety CPU.

2. 2

   Close and re-open the PLC programming software (e.g., TIA Portal) on the engineering station before the next login attempt.

3. 3

   Verify network connectivity and latency between the engineering station and the safety CPU (e.g., by pinging the CPU's IP address).

4. 4

   Check the safety CPU's security settings within the PLC project for configurable logout/login delay parameters.