Acknowledging a system error

If safe digital inputs with active interlocking are used for acknowledging a system error, adhere to the following sequence:

  1. If possible, eliminate the cause of the error.
  2. Make sure of the following:
    • No person is in the hazardous area of the system.
    • The STO safety sub-function is activated via F-DI or via safe communication and the SDI and SOS safety sub-functions are deselected and the SLI increment enable has been canceled.
  3. Acknowledge the system fault.
  4. If necessary, re-select the deselected SDI and SOS safety sub-functions and set the SLI increment enable again.