Sb 155: pre-purge, Sb156: tightness control, Sb 157: several ignition attempts – Pilz PSS SB FT, Basic license User Manual
Page 188: Appendix
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Appendix
Modular Block System: Burner Management
SB 155: Pre-purge
Version
Date
CRC
1.0
21.07.97
902C
1.1
05.05.98
3D0B
Changes from Version 1.0 to Version 1.1
Block-internal flags are reset so that output parameters
ENBL and RDY are
not influenced for the whole duration of an existing error.
SB156: Tightness control
Version
Date
CRC
1.0
20.08.97
90EE
1.1
02.03.99
D4FF
Changes from Version 1.0 to Version 1.1
• The status of
GP+ and GP- are stored internally.
• In both steps "Test for air pressure" and "Test for gas pressure", the
pressure monitors
P+ and P- will be tested for feasibility.
SB 157: Several ignition attempts
Version
Date
CRC
1.0
12.12.97
13CB
1.1
19.03.98
9B7C
STOP
Changes from Version 1.0 to Version 1.1
• Addition of the input parameter
STEP.
- This parameter signals burner start-up for the duration of a cycle.
- The input parameter
STEP replaces the internally used Bit 0 from
DW 1021 in DB 015.
- This allows you to operate several work cycles (e.g. burners) on one
PSS.