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SAPA-LAB-01-Codesys-Introduzione-2018.pdf
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CoDeSys Presentation
Sistemi e Architetture per l'Automazione L
Ing. Lorenzo Moriello
E-mail: lorenzo.moriello2@unibo.it
https://www.unibo.it/sitoweb/lorenzo.moriello2
LAR – Automation and Robotics Laboratory
DEI - Electrical, Electronic, and Information Engineering “Guglielmo Marconi”
Outline
• Introduction
time-driven vs. sequential logic control
• CoDeSys
Installation info
Software development and correctness check
Developing steps using CoDeSys
The SFC Editor
Function blocks
• Example
2
Introduction
In Automatic control levels we distinguish two main types of control:
• time-dependent control: represented by time-variant models (differential or difference
equations).
• sequential logic control: coordinates the functioning phases of the system, usually by using
discrete events (2
nd
-3
rd
layer).
Hierarchical and modular organization of a complex control system:
AUTOMATIC
CONTROL
AUTOMATION PYRAMID
3
Introduction
Technological scheme for a control system:
4
Actuators
Set
Sensors
Set
Communicating
Computing units
Interfacing
(communication)
External
communication
• mechanical (simple algorithm, high performance, no flexibility)
• electronics
• analogic electronics or electromechanical (relays)
• digital electronics
• custom (microcontrollers, DSP)
• general purpose (microprocessors, PLC)
Introduction
Goal: implement a sequential logic control.
• Usually implemented on Real-Time
digital controllers called PLC
• The ideal programming language is
the SFC defined in the IEC 61131-3
standard.
5
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