Pilz PSS SB FT, Basic license - Manual (Page 132)

6-88 Modular Block System: Burner Management
Standard Function Blocks
L M90.02 . VAV1 SB156
O M90.03 . VAV1 SB158
= A2.00 . Safety valve
• Shutdown
If SyOK = 0 or if an error is present (see error messages), a shutdown
occurs:
° No enable
→
ENBL = 0
° Ignition step not active
→
RDY = 0
° Switch off ignition transformer
→
IGNI = 0
° Close safety valve
→
VAV1 = 0
° Close pilot valve
→
VAV2 = 0
SB158
SB156
TIGHT_C
B - SSNR
B - NEXT
X - SyOK
X - V4?
X - P+
X - P-
W - T_V
Z - T
ENBL - X
RDY - B
VAV1 - X - M 90.02 .safety valve SB156
VAV3 - X
VAV4 - X
GP+ - X
GP- - X
SB158
IGNITION
B - SSNR
B - NEXT
X - SyOK
X - MANU
X - S_IG ENBL - X
RDY - B
IGNI - X
VAV1 - X - M 90.03 .safety valve SB158
VAV2 - X
RUN - X
FLAI - X
Example: