Pilz PSS SB FT, Basic license - Manual (Page 133)

Modular Block System: Burner Management 6-89
° Pilot flame not established
→
RUN = 0
° Monitor pilot flame
→
FLAI = 1
• Ignition sequence
- NEXT = 0: Ignition not yet activated
° Enable
→
ENBL = 1
° Ignition step not active
→
RDY = 0
° Ignition transformer switched off
→
IGNI = 0
° Safety valve closed
→
VAV1 = 0
° Pilot valve closed
→
VAV2 = 0
° Pilot flame not established
→
RUN = 0
° Monitor pilot flame
→
FLAI = 1
- NEXT, Bit 0 = 1: Switch on ignition transformer
° Enable
→
ENBL = 1
° Ignition step 1 is active
→
RDY, Bit 0 = 1
° Switch on ignition transformer
→
IGNI = 1
° Safety valve closed
→
VAV1 = 0
° Pilot valve closed
→
VAV2 = 0
° Pilot flame not established
→
RUN = 0
° Monitor pilot flame
→
FLAI = 1
- NEXT, Bit 1 = 1: Open safety valve
° Enable
→
ENBL = 1
° Ignition step 2 is active
→
RDY, Bit 1 = 1
° Ignition transformer switched on
→
IGNI = 1
° Open safety valve
→
VAV1 = 1
° Pilot valve closed
→
VAV2 = 0
° Pilot flame not established
→
RUN = 0
° Do not monitor pilot flame
→
FLAI = 0