Connections required between the sbs, Standard function blocks – Pilz PSS SB FT, Basic license User Manual
Page 156
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Modular Block System: Burner Management
Standard Function Blocks
Connections required between the SBs
Block
Connection required
Reason/application
SB149
NEXT (SB149)
→
Correct function cycle
RDY (of following SB149)
STEP (SB152)
→
Burner start detection and
STEP (SB149, SB157)
resetting sequence
SB150
RUN (SB158)
→
For pilot flame
RUN (SB150)
monitoring
FLAI (SB158)
→
For pilot flame
MONI (SB150)
monitoring
RUN (SB159)
→
For main flame
RUN (SB150)
monitoring
FLAM (SB159)
→
For main flame
MONI (SB150)
monitoring
Perform
AND-operation
For flame fault
ENBL from all SB150
→
evaluation
FLAs (SB152, SB157)
SB151
ENBL (SB151)
→
Fault leads to a controlled
AND-operation before
shutdown (when
AuSt = 1
ERR (SB152)
with restart)
or
ENBL (SB151)
→
Fault leads to a safety
AND-operation before
shutdown
CHAI (SB152)
SB152
ENBL (SB152)
→
Valve seal when a
SyOK (SB156, SB157,
shutdown occurs;
SB158, SB159)
ignition
RUN (SB159)
→
Signals the operating status
RUN (SB152)
of the main flame
to SB152
ENBL all SB150
Flame fault
AND-connected
→
evaluation
FLAs (SB152)
STEP (SB152)
→
Burner start detection and
STEP (SB149, SB157)
resetting sequence