Programmable Logic Controllers (PLCs) and SCADA Systems

THE WORKSHOP

SCADA has traditionally meant a window into the process of a plant and/or a method of gathering of data from devices in the field. Today the focus is on integrating this process data into the actual business and using it in real time. In addition to this, today’s emphasis is on using open standards, such as communication protocols (e.g. IEC 60870, DNP3 and TCP/IP) and 'off-the-shelf' hardware and software, as well as focusing on keeping the costs down. PLCs continue to gain in popularity. In fact, many SCADA applications use PLCs as the RTU of choice, when communicating with field devices. This comprehensive workshop covers the essentials of SCADA and PLC systems, which are often used in close association with each other.

A selection of case studies are used to illustrate the key concepts with examples of real world working SCADA and PLC systems in the water, electrical and processing industries. This workshop will be an excellent opportunity to network with your peers, as well as to gain significant new information and techniques for your next SCADA/PLC project.

Although the emphasis of the workshop will be on practical industry topics highlighting recent developments, using case studies, the latest application of SCADA, PLC technologies and fundamentals will be covered. The workshop is aimed at those who want to be updated on the latest developments in SCADA and PLC systems and wish to gain a solid appreciation of the fundamentals of their design, installation and troubleshooting.

This workshop is designed to benefit you with practical up-to-date information on the application of PLC and SCADA systems to the automation and process control industries. It is suitable for people who have little or no exposure to PLCs, but expect to become involved in some or all aspects of PLC and SCADA installation. It aims to give practical advice from experts in the field, to assist you to correctly plan, program and install a PLC with a shorter learning curve and more confidence. While the workshop is ideal for electricians, technicians and engineers who are new to PLCs, much of the material covered will be of value to those who already have some basic skills, but need a wider perspective for larger and more challenging tasks ahead.

WHAT IS INCLUDED?

  • Receive a certificate of attendance in support of your continuing professional commitment
  • All workshops include the associated hardcopy technical manual
  • Printed workshop handouts
  • Lunch and refreshments
  • Interact and network with workshop attendees and experienced instructors
  • Practical, industry driven content to assist you in your continuing professional development (CPD)
  • Attendees automatically become IDC subscribers and receive exclusive deals and technical content every month

WHO SHOULD ATTEND?

  • Consulting engineers
  • Design engineers
  • DCS personnel
  • Electrical engineers
  • Engineering managers
  • Instrumentation and control engineers
  • Instrumentation technicians
  • Process control engineers
  • Process control operators
  • Shift electricians
  • Trades staff working with or near PLCs

CONTENT SUMMARY

INTRODUCTION

  • Introduction and brief history of PLCs
  • Alternative control systems – where do PLCs fit in?
  • Why PLCs have become so widely accepted
  • Lingering concerns about PLCs

FUNDAMENTALS OF PLC HARDWARE

  • Block diagram of a typical PLC
  • PLC processor module – memory organisation
  • Input and output section – module types
  • Power supplies

BACKGROUND TO SCADA

  • Fundamentals and definition of terms
  • Comparison of SCADA, DCS, PLC and smart instruments
  • Typical SCADA installations

SCADA SYSTEM HARDWARE

  • Comparison of SCADA, DCS, PLC and smart instruments
  • Remote Terminal Unit (RTU) structure
  • Analog and digital input/output modules
  • Application programs
  • PLCs used as RTUs
  • Master site structure
  • Communications architectures
  • Point-to-point and point-to-multipoint systems
  • System reliability and availability
  • Configuration of a master station

FUNDAMENTALS OF PLC SOFTWARE

  • Methods of representing logic – Boolean, algebra, instruction code and graphical presentation
  • Fundamental ladder logic instruction set
  • Comparison of different manufacturers, memory and data representation and instruction code

USING LADDER LOGIC FOR SIMPLE DIGITAL FUNCTIONS

  • The basic rules
  • Comparison of relay ladder diagrams
  • The concept of the 'scan' and how to apply it
  • Infinite fan-out
  • Contact 'normal' states
  • Positive and negative logic
  • Basic Boolean functions
  • The usefulness of DeMorgan's law

USING REGISTERS (WORDS)

  • Number systems, timers, types of register data, counters, bit shift and rotate, table functions and register (matrix) logic functions

SCADA SYSTEMS SOFTWARE

  • Components of a SCADA system
  • Software – design of SCADA packages
  • Configuration of SCADA systems
  • Building the user interface
  • Connecting to PLCs and other hardware
  • SCADA system design
  • The twelve golden rules

GOOD PROGRAMMING HABITS

  • Keeping track of addresses and data used
  • Looking ahead – how will programs be maintained?
  • Practical methods to improve quality
    • Organisation of code
    • Documentation
    • Simplifying changes

GOOD INSTALLATION PRACTICE

  • Location of hardware
  • Good wiring practice
  • Cable spacing, power distribution and wire numbering
  • Reducing noise and interference
  • Screening and shielding

ADVANCED CONTROL WITH PLCs

  • The concept of reusable logic
  • Examples, drive logic and alarm handling
  • Use of advanced programming functions
  • Matrix logic
  • Table functions and indirect addressing
  • Example: simple display driver

PID CONTROL

  • The importance of timing and scan time
  • When PID is not always appropriate
    • Intermittent measurements
    • Long transport delays

SAFETY PROGRAMMABLE SYSTEMS

  • Why regular PLCs should not be used for safety functions
  • Programmable electronic logic solvers
  • Safety certification
  • Certified programming systems
  • Application examples
  • Growth of networked safety devices and certified networks
  • Integrated safety systems

DATA COMMUNICATIONS AND NETWORKING

  • Background to cables
  • Noise and interference on cables
  • Twisted pair cables and fibre optic cables
  • Public network provided services

INDUSTRIAL COMMUNICATIONS PROTOCOLS

  • RS-232 interface standard
  • RS-485 interface standard
  • Fieldbus
  • Modbus
  • DNP3.0

INTRODUCTION TO IEC 61131-3

  • Concepts
  • Common elements
  • Programming languages: structured text
  • Function block diagrams

SCADA NETWORK SECURITY

  • Introduction
  • Authentication and encryption
  • SCADA firewalls
  • Firewall architectures and guidelines

LOCAL AREA NETWORKS (LANs)

  • Ethernet networks
  • Industrial Ethernet
  • TCP/IP
  • LAN connectivity: bridges, routers and switches
  • Redundancy options
  • Web based industrial SCADA
  • Wireless
  • OPC

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This course is available fully online by our sister organization the Engineering Institute of Technology (EIT).

CLICK HERE for more information.