Programmable Logic Controls training day 1

04/14/2023 Presented by Global Technocrats and Consultants (GTC) Ltd

GLOBAL TECHNOCRATS AND CONSULTANTS (GTC) LTD

PLC TRAINING

ROLAND NIWAREEBACERIANO MBIIKA

EPHRAIM MALINGA

PROGRAMMABLE LOGIC CONTROLLERS

INTRODUCTION

OBJECTIVES

PROGRAMMING OPTIONS FOR PLCs

LADDER DIAGRAMS• Statement Lists• Function Blocks• Digital Inputs / outputs• Analog Input / Outputs

PLC Design, Simulation

PROGRAMMING OPTIONS FOR PLCs

PLC Basics

Ladder Logic / Programming• RSLogix 5000 – • Micrex sx programming from Fuji Electric• i-TRILOGI (Ladder + BASIC)• SYSWIN 3.4 for OMRON

C/C++ to PLC / Ladder Logic

MATLAB

LabVIEW (for NI cRIO, myRIO, myDAQ e. t. c)

PLC Basics

Function of a PLC

Inputs and outputs

Architecture and wiring

of PLCs

Network Protocols

Function of a PLC

Microprocessor based

controller with

various inputs

and outputs

Function of a PLC

Inputs and Outputs

• These are typically switches or sensors• Designed with opto – isolators

Inputs and Outputs

• Relays (volt free)• Triac• Transistors

Architecture and Wiring Diagrams

Network Protocols

• Note nature in which I/O devices are connected

• Note also they are either ON/OFF (hence digital in nature)

• However, PLC I/O signals are analog (vary between 4 – 20mA)

• What does this imply ?

04/14/2023

Standards used

• Field bus: ASibus, Profibus, Devicenet and Modbus

Hierarchy

Bus Systems

Review Questions

1.Switches, proximity devices and sensors are generally used in what way in a plc application? a) Relaysb) Software elementsc) Inputsd) Outputs

Review QuestionsStudy the diagram Below

Revision Questions

Pick the correct statement about it. a) When the power is switched on to the PLC all the N/O

relay contacts are shown closeb) The 24 V supply shown is used to power the plc itself. c) The plc energises an output by closing the relevant relay

contact. d) When the plc outputs are energised they are al l latched

on by the relay contacts shown

Programmable Logic Controls training day 1

Engineering

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