Pilz PSS SB FT, Basic license - Manual (Page 82)

6-38 Modular Block System: Burner Management
Standard Function Blocks SB152
Automatic restart after air deficiency
When AuSt = 1 and FTRY = 1, SB152 sets its ENBL and STEP output
immediately if the input conditions are fulfilled after air pressure failure
i.e.
AirP = 0
If correct air pressure is present again, monitoring can be activated with NEXT
and then the next step can be carried out. With each burner start-up, a pulse
is created at the
STEP output with which all SB149 blocks and SB157 are
reset.
Spurious signals
No irregularities with a safety sequence failure.
ENBL= 1 only after a reset, a de-energised
monitor sequence and start pulse. geschlosse-