Pilz PSS SB FT, Basic license - Manual (Page 92)

6-48 Modular Block System: Burner Management
Standard Function Blocks
SB154: Control and position monitoring of valves
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
• Pos1: Limit switch (N/O contact “start position reached?”)
Pos1 = 1: valve in the “start position”
Pos1 = 0: valve not in the “start position”
• Pos2: Limit switch (N/O contact “operating position reached?”)
Pos2 = 1: valve in “operating position”
Pos2 = 0: valve not in the “operating position”
• Dir1: Drive direction
positive edge from
Dir1: valve will take up the start position
• Dir2: Drive direction
positive edge from
Dir2: valve will take up the operating
position
• T_V: Switch time for a change in position
Permitted value range: 1 ... 32767,
multiplying the value with the fixed time base of 50 ms gives a
time range from 50 ms ... 27.3 min.
SB154
VALVE
B - SSNR
X - Pos1
X - Pos2
X - Dir1
X - Dir2
W - T_V
Z - T
X - RSET
ENBL - X
VAV - X