PLC programming

The information presented in this section are intended exclusively for the scholastic process of my students from the Technical College "Edmond Nicolau" Focsani, with specialization "mechatronics" and is based on the "FexForm" - Romania, Festo exercices solutions  and PLC programming standard IEC 61131-3.

1. Exercise 1.

The AND Function


Problem Description


A press stamp 1.0 is to advance only if a push button is actuated and a protective guard is closed. If one of these conditions is not met, the press tool is to return immediately.

The position of the closed protective guard B1 is monitored by a proximity switch B1. The press tool is advanced or retracted by means of a spring return solenoid valve (Coil Y1).

·         Draw the electrical circuit diagram and Electro-pneumatic circuit diagram.
·         Assemble the equipment.
·         Formulate the PLC program using MultiProg
·         You can use any one or all of the five languages available.
Solution:


a) Electro-Pneumatic Circuit Diagram
b) Electrical Circuit Diagram
c) Variables for FESTO PLC:

Name
Attrib
Type
Comment
Input0_0
[Input]
BOOL
Start Switch S1
Input0_1
[Input]
BOOL
Safety Sensor B1
Output0_0
[Output]
BOOL
Cylinder Extends Y1

d) Ladder programming:
e) Instructions list programming:

LD Input0_0
AND Input0_1
ST Output0_0

f) Statement List Programming

Output0_0:= Input0_0 AND Input0_1;

g) Function Block Diagram programming:






















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