Pilz PSS SB FT, Basic license - Manual (Page 116)

6-72 Modular Block System: Burner Management
Standard Function Blocks
Enable and cancel tightness control via SyOK
SB156
SyOK = 0 resets the ENBL and all RDY outputs.
After the return of the signal, a new cycle can be started.
(via the
NEXT signals).