Pilz PSS SB FT, Basic license - Manual (Page 134)

6-90 Modular Block System: Burner Management
Standard Function Blocks
- NEXT, Bit 2 = 1: Open pilot valve
° Enable
→
ENBL = 1
° Ignition step 3 is active
→
RDY, Bit 2 = 1
° Ignition transformer switched on
→
IGNI = 1
° Safety valve open
→
VAV1 = 1
° Open pilot valve
→
VAV2 = 1
° Pilot flame not established
→
RUN = 0
° Do not monitor pilot flame
→
FLAI = 0
- NEXT, Bit 3 = 1: Pilot flame established
° Enable
→
ENBL = 1
° Ignition step 4 is active
→
RDY, Bit 3 = 1
° Ignition transformer switched on
→
IGNI = 1
° Safety valve open
→
VAV1 = 1
° Pilot valve open
→
VAV2 = 1
° Pilot flame established
→
RUN = 1
° Monitor pilot flame
→
FLAI = 1
- NEXT, Bit 4 = 1: Switch off pilot transformer
° Enable
→
ENBL = 1
° Ignition step 5 is active
→
RDY, Bit 4 = 1
° Switch off ignition transformer
→
IGNI = 0
° Safety valve open
→
VAV1 = 1
° Pilot valve open
→
VAV2 = 1
° Pilot flame established
→
RUN = 1
° Monitor pilot flame
→
FLAI = 1
- NEXT, Bit 5 = 1: Close pilot valve
° Enable
→
ENBL = 1
° Ignition step 6 is active
→
RDY, Bit 5 = 1
SB158