scadasystem - telemark university...

Hans-‐Pe(er Halvorsen, M.Sc.

SCADA System myRIO

Air Heater

Or Web Service?

Lab Topics

•  Supervisory Control and Data AcquisiFon (SCADA)

•  Control Theory, PID Control •  OPC •  Database Systems (SQL Server), SQL •  LabVIEW •  Industrial IT and Network Infrastructure

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Hardware

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Air Heater

myRIO

The following Hardware will be used:

SoSware

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LabVIEW SQL Toolkit

Matrikon OPC Server for SimulaFon

The following SoSware will be used:

LabVIEW Real-‐Time Module

LabVIEW myRIO Toolkit

Used for Programming & CommunicaFon with the myRIO device

Assignment Overview

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Create the following SCADA System:

See next slides for more details...

Or Web Service?

Assignment •  The SCADA system should contain 4 different parts:

1.  A Database that stores all the necessary data 2.  Control System 3.  Datalogging System 4.  Alarm System

•  Note! They should be implemented as separate applicaFons because they should be able to run on different computers in a network.

•  By default we will use LabVIEW to create our SCADA system, but if you like you can use, e.g., C# to implement one or more of these applicaFons, e.g., ASP.NET is appropriate for the the Alarm system.

See next slides for more details... 6

SCADA

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PLC DCS

SCADA

SCADA (Supervisory Control And Data AcquisiFon) is a type of industrial control system (ICS)

Industrial control systems are computer controlled systems that monitor and control industrial processes that exist in the physical world.

Industrial control systems, like PLC (Programmable Logic Controller), DCS (Distributed Control System) and SCADA (Supervisory Control And Data AcquisiFon) share many of the same features

e.g., DeltaV

e.g., Siemens Step 7

e.g., LabVIEW DSC

Theory

Database System


Part 1

Design & Implement a Database for your SCADA system

Database RecommendaFons

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Tag Configura7on: The TAG table(s) could e.g. have the following columns: •  TagId (int, Primary Key, IdenFty) •  TagName (varchar) •  ItemId (varchar) •  ItemUrl (varchar) •  DescripFon (varchar) •  Etc.

Tag Data: Create one or more tables used for logging the Tag Values into the Database. The following fields are important for an OPC Item: •  ItemId •  Value •  Timestamp •  Status (e.g., “AcFve”, “Not AcFve”) •  Quality (e.g., “Good”, “Bad”) •  etc.

Alarm Configura7on & Alarm Data: Important fields in an alarm handling system could be: •  Alarm id •  AcFvaFon Fme •  Acknowledge Fme •  Type of alarm •  Tag •  Alarm limit •  Text descripFon •  etc.

Here are some examples of funcFonality of the SCADA system and informaFon that could be stored in the Database.

Database RecommendaFons

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The alarm system will be responsible for the warnings and the alarms in a monitoring and control system. An alarm system contains different Alarms and Warnings like: •  Timeout; no input from a sensor or

another computer system within a specific amount of Fme,

•  High High (HH) or Low Low (LL) alarm; a criFcal alarm condiFon,

•  High (H) or Low alarm (L) •  I/O device errors •  System device errors •  etc. Make sure your alarm tables and system can handle these kinds of alarms and warnings.

An Alarm System use different Alarm devices, such as •  Screen; display the alarms •  Keyboard; alarm operaFons •  Horn; indicate an acFve alarm, or

security alarm •  Lamp; indicate an acFve alarm, or

an acFve alarm by blinking and an acknowledge alarm by a steady light

•  Printer; logging of the alarm states •  SMS •  E-‐mail •  Etc. Make use of one or more of these alarm devices in your Alarm Handling and Management System.

Control System


Part 2

Air Heater myRIO

App1: Control System

•  Create an ApplicaFon in LabVIEW that controls the Air Heater Temperature. Use standard PI(D) control.

•  You need to create a HMI (Human Machine Interface) for your applicaFon.

•  The process data should be sent to an OPC Server. You should write the Control Signal (u) and the Process Value (y) to the OPC Server

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LabVIEW

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PID Control

HMI

OPC

•  Your HMI should consist of different symbols, like, e.g., pumps, pipes, etc.

•  You may want to use the LabVIEW DSC (Datalogging and Supervisory Control) pale(e in LabVIEW in order to create your own HMI.

•  Alarm funcFonality should be included in the HMI

This is just an example to illustrate a typical HMI

Write to OPC Server using LabVIEW

Or specify URL directly:

1 2 3 4

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While Loop

While Loop

Datalogging System


Part 3

App 2: Datalogging System

•  Create an applicaFon in LabVIEW that reads the values from the OPC Server and store them in the SQL Server.

•  Use, e.g., the LabVIEW SQL Toolkit

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Read from OPC Server using LabVIEW

Or specify URL directly:

1 2 3 4

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While Loop

While Loop

Alarm System


Part 4

App 3: Alarm System

•  The Alarm System should check for Alarms and saves the Alarm informaFon in your Database.

•  In addiFon you should have a User Interface that shows the Alarms.

•  You could implement Alarm Logging in your SCADA system by using a Database Trigger on the table that stores the Tag Data.

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Alarm System

•  Create an Alarm ApplicaFon that shows all the alarms in the system.

•  The operator should be able to see the alarms and make some acFons to these alarms, i.e. the operator should have the possibility to Acknowledge Aarms, Show Alarms with different PrioriFes, etc.

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Alarm System

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Simple Alarm System Example:

Note! This is just a simple example in order to illustrate the basic funcFonality in such a system. You should design your own Alarm System with HMI.

Network


Typically, the different parts in a SCADA system are distributed in a network

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Network

If you want to connect all of your computers together, you will need to use a networking device. While routers are the most common networking opFon, a network switch is a less expensive choice that can work just as well. Although a network switch lacks the built-‐in firewall of a router, it is a more than adequate choice for most small-‐scale networks in a home or office sejng.

OPC Server

Visual Studio

App #1

App #3

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OPC Network Example

App #2

Network with Switch/Router

Database

SQL Server

What is VirtualizaFon? •  VirtualizaFon, in compuFng, refers the act of creaFng a virtual (rather than actual) version of something, including but not limited to a virtual computer hardware plalorm, operaFng system (OS), storage device, or computer network resources.

•  Hardware virtualizaFon or plalorm virtualizaFon refers to the creaFon of a virtual machine that acts like a real computer with an operaFng system.

•  In hardware virtualizaFon, the host machine is the actual machine on which the virtualizaFon takes place, and the guest machine is the virtual machine.

[Wikipedia] 25

VirtualizaFon SoSware

A lot of VirtualizaFon SoSware exists. Here are some examples: •  VMware Player •  VMware WorkstaFon •  VMware vSphere •  VMware Fusion (Mac) •  Parallells Desktop (Mac) •  MicrosoS Hyper-‐V •  VirtualBox •  etc.

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VMware Player VMware Player is for personal use on your own PC. VMware Player is free of charge for personal non commercial use.

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VMware is a company that has been specializing within virtualizaFon soSware. h(p://www.vmware.com

OPC in Network •  OPC uses COM/DCOM -‐> Complicated to make it work in a modern Network!!

•  SoluFon: Use an OPC Tunneller SoLware – OPC Tunneller from MatrikonOPC (30 days free trial) – Cogent DataHub Tunnelling SoSware (Trial soSware works only 1 hour, then needs to be restarted)

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Hans-‐PePer Halvorsen, M.Sc. Telemark University College Faculty of Technology Department of Electrical Engineering, Informa7on Technology and Cyberne7cs

E-‐mail: [email protected] Blog: hPp://home.hit.no/~hansha/

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