Siemens Module B3 ユーザーズマニュアル
Automation and Drives - SCE
T I A Training Document
Page 34 of 64
Module
3.2 Possible Solution for the PLC Program:
Analog Value Processing
Network 1: Enter and normalize analog value of actual level
"AI_Level_Actual“
"AI_Level_Actual_Norm“
"AI_Level_Setp“
Network 2: Enter and normalize analog value of setpoint level
t
i t L
l
****************************************************************************************************************
Network 1: Controller switched on?? If off, then jump to label "Off“
"AI_Level_Setp_Norm“
Two Position Contoller
"Start“
"Controller_On“
"Stop“
"Controller_On“
"Controller_On“
"Ind_ON“
exit
"Controller_On“
"Stop“
"Controller_On“
"Controller_On“
"Ind_ON“
exit
Network 2: Call subroutine: enter and normalize analog values
Network 3: Calculation of switching hysteresis Xs = w/10
"AI_Fill_Setp_Norm“
Preface Fundamentals Discontinuous Action Controllerr Controller Block (S)FB41 Setting the System Appendix
B3
Issued: 02/2008 Control Engineering with STEP 7