Pilz PSS SB FT, Basic license - Manual (Page 59)

Modular Block System: Burner Management 6-15
Output parameters
ENBL: Enable flag bit
ENBL = 1: this function is fault-free
(refer also to the Programming guidelines)
Function:
Pilot and main flame monitoring from burner start-up to operating position,
through to burner switch-off.
Error messages
Any fault that is detected will be stored statically in the corresponding error
data word (SSNR) of DB015 (1st data block).
• Error messages in DB 015
- Bit00: Burner in operating position but no flame established
Remedy: Exit operating position ( RUN = 0),
and bring SB150 to the start position ( MONI = 1, F_S1 = 0,
F_S2 = 1, RUN = 0).
- Bit01: Burner not in the operating position, but the flame is established
Remedy: Bring SB150 to the start position ( MONI = 1, F_S1 =
0, F_S2 = 1, RUN = 0).
- Bit02: Burner in the operating position and both flame monitor
contacts ( F_S1 and F_S2) have the value 1.
Remedy: Exit operating position ( RUN = 0), check flame
monitors' contacts and bring SB150 to the start position
(
MONI = 1, F_S1 = 0, F_S2 = 1, RUN = 0).
- Bit03: Burner in operating position and both flame monitor contacts
( F_S1 and F_S2) have the value 0
Remedy: Exit operating position ( RUN = 0), check flame
monitor contacts and bring SB150 to the start position ( MONI
= 1, F_S1 = 0, F_S2 = 1, RUN = 0).
- Bit04: Burner not in the operating position and both flame monitor
contacts ( F_S1 and F_S2) have the value 1
Remedy: Check flame monitor contacts and bring SB150 to the
start position(
MONI = 1, F_S1 = 0, F_S2 = 1, RUN = 0).
- Bit05: Burner not in the operating position and both flame monitor
contacts ( F_S1 and F_S2) have the value 0
Remedy: Check flame monitor contacts and bring SB150 to
the start position ( MONI = 1, F_S1 = 0, F_S2 = 1, RUN = 0).