[PDF] PLC Based Process Control Engineering Guide - Omron - 1st Edition

PLC Based Process Control Engineering Guide – Omron – 1st Edition

Descripción

PLC-based process controller is a process control system which has the base of SYSMAC SC/CJ series. It can be adopted for both loop control which controls analog signals and sequence control which mainly handles contacts. By combining a loop controller and process I/O units, loop control functionality can be added onto the PLC, maintaining the basic PLC function.When developing a system, operating environment, such as initial setting of PLC is required, so that the PLC can operate. Then, utilize CX-Process, the tool software of loop controller to build the system. HMI can be selected from the Touch panel (NS series), special monitoring software CX-Process Monitor Plus, and general HMI software, depending on the application. This manual describes the procedure to build a PLC-based process control system.The engineering method may differ depending on the devices. In this manual, an example system is built on the Loop-control CPU Unit (CJ1G-CPU**P) and HMI recommended by Omron is combined.

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  • Introduction
    About this Manual
    About Loop Controllers
    Notice:
    Read and Understand this Manual
    SECTION 1
    Outline of PLC-based Process Controller
    1-1 Features of PLC-based Process Control
    1-2 Point of Loop Controller
    1-3 Internal Mechanism of Loop Controller
    1-4 Outline Outline of Procedures to build PLC-based Process Control System
    SECTION 2
    Procedures to Build PLC-based Process Control System
    2-1 Design
    2-2 Setting up the Hardwares
    2-3 Initial Setting of PLC on CX-Programmer
    2-4 Programming Offline for Loop Controller
    2-5 Transferring the program to the Loop Controller
    2-6 Test Run with CX-Process Tool
    2-7 Creating Monitor Screen for NS Series PT
    SECTION 3
    3-1 HMI Function
    3-2 Connections via Ethernet
    3-3 Monitoring by CX-Process Monitor Plus
    3-4 Scaling
    3-5 Order of Operations
    3-6 Load Rate of the Loop Controller
    3-7 External I/O Response Time
    3-8 Errors and Alarm Troubleshooting
    3-9 Contents of a CSV Tag File
    3-10 List of Function Blocks
    SECTION 4
    Application Cases
    4-1 Cascade Control
    4-2 Split Control
    4-3 Position-propotional Control (Motor Opening Manipulator)
    4-4 Process Control with Dead Band (Sample PI Control)
    4-5 Proccess Control with Dead Band (Smith Dead Time Compensation Control)
    4-6 Temperature and Pressure Correction (Vortex Flowmeter)
    4-7 Temperature and Pressure Correction (Differential Pressure Flowmeter)
    4-8 Temperature and Pressure Correction (Variable Area Flowmeter)
    4-9 Average Temperature Control for Constant Temperature Bath (With bias for input and output)
    4-10 Average Temperature Control for Constant Temperature Bath
    4-11 Calorie Control of Mixed Gas
    4-12 Neutralizing of Acid Discharged Water
    4-13 Arithmetic Operation (Addition or Subtraction)
    4-14 Arithmetic Operation (Division)
    4-15 Arithmetic Operation (Multiplication)
    4-16 Arithmetic Operation (Average Value)
    4-17 Time-proportional Output Controller
    4-18 Neutralization Control (Acid and Alkali Control)
    4-19 Electric Valve Control by Electric Positionner
    4-20 Dead Band Control (With Deviation Alarm)
    4-21 Flow Rate Control
    SECTION 1
    Outline of PLC-based Process Controller
    1-1 Features of PLC-based Process Control
    1-1-1 Outline
    1-1-2 Features
    1-1-3 Basic System Configuration
    1-2 Point of Loop Controller
    1-3 Internal Mechanism of Loop Controller
    1-3-1 Loop Controller Mechanism
    1-4 Outline Outline of Procedures to build PLC-based Process Control System
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