Graduation Project Presentation

Wireless Accessibility to Local
Measurements and Control in
Industrial Processes> CSE 2007

Presentation Contents
●Project Overview
●Process Control Studio (PCS) Software
●PCS Software Mobile Edition
●Wireless Accessibility
●Ethernet Interface
●Data Acquisition
●Control

Goal of our Project
●Implementation of Distributed Process
Control System

Wireless Industrial Monitoring

Scenario
●Engineer connects local
controller to processes
●Chooses input and output
channel

Scenario
●Engineer forms a model on the software
●Our software: PCS (Process Control
Studio)
●Model analogous to real-process
●Associate model parts to I/O channels
on controller
●Load .pcs file to laptop or PDA

●Project Overview
●Ethernet Controller
●Data Acquisition
●Control

PCS Software
>Process Control Studio

Process Control Studio (PCS) Software
●PCS Features
●PCS Alarming System
●PCS Data Base

PCS Features
●Attractive user interface
●Support two mode
 Design time mode
 Run time mode
●Designing & Monitoring more than one
process at the same time
●Save and load Design process
●Failure notification
●Authentication

PCS Alarming System
PCS alarming system
Visual notification
●Flash
●Notification
window
Sound SMS

PCS Data Base
●Simple to use
●It improves the capabilities of the overall the system
●Able to trace the shortage in any component in the
system & notify for making order
●It holds useful data about each component
●Store any alarm accrues In run time

●Project Overview
●PCS Software MobileEdition
●Data Acquisition
●Control

PCS
Mobile Edition>Personal Digital Assistant

Introduction
●.NET Compact Framework (.NET CF)
●Operating System Used in This Project
oWinCE 5 operating system .

Program Description
●Process Control Studio PDA Edition
oLight version of PCS
oRun Mode only
> Program Stages
●Loading
●Scaling
●Network Sockets

●Project Overview
●PCS Software
●Control
●Data Acquisition

●Wireless Standards
●Basic Topologies
●Access Point Features
●Wireless-to-Ethernet Bridge

Wireless Networking
Wireless Networking overview
Wireless Networking Standards
Standard
(Market Name)
802.11
(Wi-Fi)
802.15.1
(Bluetooth)
802.15.4
(ZigBee)
Application
Focus
Web, e-mail,
video
Cable
replacement
Control and
monitoring
Bandwidth 11 Mbps 1-3 Mbps 20 – 250 kbps
Transmission
Range
100+ 20 (Class 2)
100+ (Class 1)
20-70,
100+(ext. amp.)
Success Metrics Speed
flexibility
Cost, convenience Power, cost
We chose Wi-Fi

Modes of WLAN
Infrastructure Mode
Ad-Hoc Mode

Access Point’s features
- Roaming
handshaking done by AP and OS of
wireless device
- Security
WEP: now obsolete
WPA-PSK: stronger keys

Wireless-to-Ethernet Converter
●Wi-Fi compliant
●Up to 11 Mbps
●Protocols: TCP and UDP
●Security: WEP and WPA-PSK

Wireless-to-Ethernet Converter
●Airborne bridge has its
own IP for configuration
●Transparency: to
send/receive data, deal
with IP of client

Ethernet Interface
Ethernet Interface Hardware
●Motorola MC9S12NE64
Microcontroller
- Features
●Demonstration Board
(DEMO9S12NE64)

Ethernet Interface
Ethernet Interface Software
●OpenTCP TCP/IP Stack
●Main Application (PCSCP)

OpenTCP TCP/IP Stack
●Structure

OpenTCP TCP/IP Stack
●Robustness – Portability
●Modularity
●Multitasking
●Operation

Main Application (PCSCP)
●Features
●Examples

PCSCP Transactions
Successful Transaction

PCSCP Transactions
Failed Transaction

Why “ Local Controller ” is needed ?
●It is needed to do:
 Process Data Sampling
 Process Control

Why “ Data Acquisition ” is needed ?
●The Data Acquisition does:
 Sampling of the process data
 Any Digital or Analog
conversions

What is “ Data Acquisition “ ?
●It consists of 2 sub-modules:
1) Analog-to-Digital (ADC)
2) Digital-to-Analog (DAC)
●The ADC and DAC are controlled by the
microcontroller
Data
Preparation

Interfacing the Process with the
Data Acquisition
●Process Input and Output
●Input is Control Action
( Manipulated Variable)
●Output is Controlled
Variable

Hardware Choices
●Freescale DEMO9S12NE64 based on
MC9S12NE64 MCU
- Main Features:
oAnalog-to-Digital converter (ADC)
oTimer module (TIM )
oSerial interfaces
- One Serial Peripheral Interface (SPI)

Analog-to-Digital converter (ADC)
●ADC is a built in module in the MCU
- 8 channel module
- 10 Bit Resolution
●8-Bits was used (1-byte)
- To ease the calculations
- Compromise data storage

Digital-to-Analog converter (DAC)
●MAX528 from MAXIM INC.
●The MCU Communicates with DAC by SPI
●SPI is built in the MCU
Master Slave

Centralized and Localized Control
●In our project, we chose localized control.

Digital Control
●There are differences between digital
control and analog control
●Analysis in z-domain rather than s-domain
●We need to consider:
oSampling Time
oResolution

Microcontroller Capabilities
●8 Analog Input Channels
●8 Analog Output Channels
●8 Digital Input Channels
●8 Digital Output Channels
●8 On/Off Controllers
●8 PID Controllers
●Implemented in C-code using structures

On/Off Control
●Analog Input & Digital Output
●Simply implemented using IF-ELSE
statement
●Only valid for first-order processes
●Parameters: Set Point and On-Off

PID Control
●Analog Input & Analog Output
●Implemented using mathematical
expressions
●Valid for any order process

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Graduation Project Presentation

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