TRTSTeam-6))EET-EL-5

15/5/12204 – Ibrahim Hamdy 219 – Salman Hassan

About : PLC ( LOGO )With Mr.Klaus Koevener

EXPERIMENT as an

introduction for the lesson

PLC’s

 GETTING STARTED

 What is a PLC?

 PLC ; Programmable Logic Controller 

*PLC’s are in the computer family. *PLC’s are used in commercial and industrial applications.

*PLC’s act as controllers for machines and processes. *They monitor inputs, make decisions, and control outputs

in order to automate machines and processes.

A PLC is built similarly to a computer. It has:

#A power supply unit. #Relay units for inputs and outputs.

#A central unit with a programmable microprocessor. #Internal memory.

The controlling process is supervised by a program stored in the memory of the device.

Basic PLC Operation The primary parts of a PLC are the inputs modules, the CPU, and the outputs modules :

What is “Siemens LOGO? ”!

It is a very simple PLC.Programming the LOGO:

Programming the LOGO is carried out using a graphical programming language.

 To produce a program and upload it onto the LOGO, we use a software

running on a PC : LOGO! Soft Comfort.

An example of LOGO wiring

Lamp

The Program Current Circuit

Example 1 :

Lamp

L /24V

N

The Program Current Circuit

Example 2 :

Group Work

5 minutes

RELAYHow does a Relay work?

It is as an Electromagnetic switch . It contains a coil & a switch placed inside a casing. The switch is controlled by the coil. When a current flows the coil, the coil behaves like a magnet, & change the state of the switch.

NOTICE:It`s switch as (Power Circuit )It`s coil as (Control Circuit)

Example3:Bell, Relay & 2 variable currents.

Exercise:What’s wrong with this program!?

Lamp

Lamp

TimersHow to use timer for any circuit in LOGO?!

Partner Work

5 minutes

Summary

Any Questions?

Thank YouFor Attention..