Pilz PSS SB FT, Basic license - Manual (Page 186)

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Appendix
Modular Block System: Burner Management
SB151: Transient suppression
Version Date CRC
1.0 18.08.97 0F69
1.1 05.02.99 5710
Changes from Version 1.0 to Version 1.1
Internal start-up has been improved: Evaluation of the negative edge from
S1 in cases where SB 151 has not been called up in each cycle and
immediately after a cold start or reset, even though the block is required for
the application.
SB152: Burner: start and operator elements
Version Date CRC
1.0 09.12.97 2859
1.1 26.03.98 FF21
STOP
1.2 12.08.98 C491
Changes from Version 1.0 to Version 1.1
• Addition of input parameter D_C.
- This parameter contains the number of cycles for the delayed enable of
SB 152 after the PSS has started-up. The delayed enable is required so
that the flame monitors can reach a defined position without a fault lock-
out occurring.
- The input parameter D_C replaces internally DL 1021 in DB 015.
• Addition of the output parameter STEP.
- This parameter signals burner start-up for the duration of a cycle.
- The output parameter STEP replaces internally Bit 0 from DW 1021 in
DB 015.
- This allows you to operate several work cycles (e.g. burners) on one
PSS.
• When starting after triggering the STOP-Signal, the signal to reset
the sequence (STEP) is set for the duration of one cycle.