PLC-based process control Engineering guide OMRON

TABLE OF CONTENTS
Application Cases
4-1 Cascade Control..................................................................................................................... 4-1
4-2 Split Control .......................................................................................................................... 4-7
4-3 Position-propotional Control (Motor Opening Manipulator) ................................................ 4-11
4-4 Process Control with Dead Band (Sample PI Control) ......................................................... 4-14
4-5 Proccess Control with Dead Band (Smith Dead Time Compensation Control).................... 4-17
4-6 Temperature and Pressure Correction (Vortex Flowmeter) .................................................. 4-20
4-7 Temperature and Pressure Correction (Differential Pressure Flowmeter) ............................ 4-24
4-8 Temperature and Pressure Correction (Variable Area Flowmeter)....................................... 4-27
4-9 Average Temperature Control for Constant Temperature Bath (With bias for input and output)4-30
4-10 Average Temperature Control for Constant Temperature Bath ............................................ 4-34
4-11 Calorie Control of Mixed Gas ............................................................................................... 4-38
4-12 Neutralizing of Acid Discharged Water ................................................................................ 4-42
4-13 Arithmetic Operation (Addition or Subtraction) ................................................................... 4-45
4-14 Arithmetic Operation (Division)............................................................................................ 4-48
4-15 Arithmetic Operation (Multiplication) .................................................................................. 4-51
4-16 Arithmetic Operation (Average Value) ................................................................................. 4-54
4-17 Time-proportional Output Controller .................................................................................... 4-57
4-18 Neutralization Control (Acid and Alkali Control)................................................................. 4-59
4-19 Electric Valve Control by Electric Positionner ..................................................................... 4-63
4-20 Dead Band Control (With Deviation Alarm)......................................................................... 4-64
4-21 Flow Rate Control ................................................................................................................. 4-