Pilz PSS SB FT, Basic license - Manual (Page 79)

Modular Block System: Burner Management 6-35
causes the output ENBL to be set to “0” and will only be set back to “1”, if:
• The failed criteria is once again fulfilled, i.e. at “1”.
• A reset followed, this means a pulse was issued to the RSET input
• And a start pulse was issued to the STRT input.
Please note: The short signals at the inputs are spurious signals. They
are to be expected and will not trigger a fault.
Failure of monitor sequence