Automation and Drives - SCE
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“
Network 2 | : |
| Enter and normalize analog value of setpoint level | |
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t i t | ||||
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| "AI_Level_Setp“ |
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"AI_Level_Setp_Norm“
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Two Position Contoller
Network 1: Controller switched on?? If off, then jump to label "Off“
"Start“ "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“
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| Preface Fundamentals | Discontinuous Action Controllerr | Controller Block (S)FB41 | Setting the System Appendix |
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| T I A Training Document | Page 34 of 64 | Module | ||
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| B3 | |
Issued: 02/2008 |
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| Control Engineering with STEP 7 | ||