TRTS Team-6))EET-EL-5 15/5/12 204 – Ibrahim Hamdy 219 – Salman Hassan About : PLC ( LOGO ) With Mr.Klaus Koevener.

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Presentation transcript:

TRTS Team-6))EET-EL-5 15/5/ – Ibrahim Hamdy 219 – Salman Hassan About : PLC ( LOGO ) With Mr.Klaus Koevener

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. 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 :

RELAY How 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 Timers How to use timer for any circuit in LOGO?!

Summary

Any Questions ?

Thank You For Attention..