SAFETY CIRCUIT FAULT

What does 405 mean?

The Safety Circuit, wired between TB3-1 and TB3-6 on Power Supply A4, was not closed for 100 milliseconds before a “Drive Run” command, or it opened unexpectedly while the loop contactor was closed.

• Safety Circuit between TB3-1 and TB3-6 not closed before a “Drive Run” command.
• Safety Circuit opened unexpectedly while the loop contactor was closed.
• Intermittent connections in the Safety Chain.

Click steps to track your progress.

1. 1

   Verify that the Safety Circuit between TB3-1 and TB3-6 on Power Supply A4 is properly closed.

2. 2

   Check for intermittent connections in the Safety Chain.

3. 3

   Ensure the Safety Chain remains closed for 100ms prior to and during a “Drive Run” command.