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PLC ladder logic training guide
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04/14/2023 Presented by Global Technocrats and Consultants (GTC) Ltd
GLOBAL TECHNOCRATS AND CONSULTANTS (GTC) LTD
PLC TRAINING
ROLAND NIWAREEBACERIANO MBIIKA
EPHRAIM MALINGA
04/14/2023 Presented by Global Technocrats and Consultants (GTC) Ltd
PROGRAMMABLE LOGIC CONTROLLERS
INTRODUCTION
04/14/2023 Presented by Global Technocrats and Consultants (GTC) Ltd
OBJECTIVES
PROGRAMMING OPTIONS FOR PLCs
LADDER DIAGRAMS• Statement Lists• Function Blocks• Digital Inputs / outputs• Analog Input / Outputs
PLC Design, Simulation
04/14/2023 Presented by Global Technocrats and Consultants (GTC) Ltd
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)
04/14/2023 Presented by Global Technocrats and Consultants (GTC) Ltd
PLC Basics
Function of a PLC
Inputs and outputs
Architecture and wiring
of PLCs
Network Protocols
04/14/2023 Presented by Global Technocrats and Consultants (GTC) Ltd
Function of a PLC
Microprocessor based
controller with
various inputs
and outputs
04/14/2023 Presented by Global Technocrats and Consultants (GTC) Ltd
Function of a PLC
04/14/2023 Presented by Global Technocrats and Consultants (GTC) Ltd
Inputs and Outputs
• These are typically switches or sensors• Designed with opto – isolators
04/14/2023 Presented by Global Technocrats and Consultants (GTC) Ltd
Inputs and Outputs
• Relays (volt free)• Triac• Transistors
04/14/2023 Presented by Global Technocrats and Consultants (GTC) Ltd
Architecture and Wiring Diagrams
04/14/2023 Presented by Global Technocrats and Consultants (GTC) Ltd
Architecture and Wiring Diagrams
04/14/2023 Presented by Global Technocrats and Consultants (GTC) Ltd
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
04/14/2023 Presented by Global Technocrats and Consultants (GTC) Ltd
Hierarchy
04/14/2023 Presented by Global Technocrats and Consultants (GTC) Ltd
Bus Systems
04/14/2023 Presented by Global Technocrats and Consultants (GTC) Ltd
Review Questions
1.Switches, proximity devices and sensors are generally used in what way in a plc application? a) Relaysb) Software elementsc) Inputsd) Outputs
04/14/2023 Presented by Global Technocrats and Consultants (GTC) Ltd
Review QuestionsStudy the diagram Below
04/14/2023 Presented by Global Technocrats and Consultants (GTC) Ltd
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
