Pilz PSS SB FT, Basic license - Manual (Page 142)

6-98 Modular Block System: Burner Management
Standard Function Blocks
SB159: Run
Block header
Input parameters
• SSNR: Safety subroutine number
Permitted value range: 1 ... 200
Format: Byte-constants KB001 ... KB200
(further information about the
SSNR can be found in the
sections “Administration data blocks DB015, DB016 and
DB017” and “Input parameter
SSNR” in chapter 5).
Value of DW0000/DB015 = 0: no error present
• NEXT: Sequence input
Bits 0...3 of the input byte represent a processing step in the
block. By setting a bit the corresponding step in the block is
started.
• SyOK: General plant status (system OK)
Note: supply the output parameter
ENBL from SB152 to the
input parameter SyOK of SB159.
SyOK = 1: no error
SyOK = 0: error in the system, leads to a shutdown
Output parameters
• ENBL: Enable flag bit
ENBL = 1: this function is fault-free
(refer also to Programming guidelines)
• RDY: Sequence output
If a block step is activated, the corresponding bit is set in the
output parameter
RDY.
SB159
SB159
RUN
B - SSNR
B - NEXT
X - SyOK ENBL - X
RDY - B
VAV3 - X
REGL - X
RUN - X
FLAM - X