- •1. TABLE OF CONTENTS
- •2. COMPUTER HARDWARE
- •3. A BRIEF OVERVIEW OF COMPUTER HARDWARE
- •3.1 BASIC COMPONENTS
- •3.1.1 The components of a computer are,
- •3.1.2 Some I/O Devices
- •3.2 AN EXAMPLE OF A COMPUTER IN MANUFACTURING
- •3.3 COMMERCIAL COMPUTERS
- •3.3.1 Mainframes
- •3.3.2 Super Computers
- •3.3.3 Workstations
- •3.3.4 Personal Computers
- •3.3.5 Dedicated Computers
- •3.3.6 Single Board Computers
- •3.4 ARCHITECTURE AND BUSES
- •3.4.1 Clock Speed and the Buses
- •3.5 SOFTWARE
- •4. COMPUTER INTERFACING
- •4.1 DIGITAL SIGNALS
- •4.2 ANALOG SIGNALS
- •4.2.1 Analog to Digital Conversion
- •4.2.1.1 - Flash A/D Converter
- •4.2.2 Digital to Analog Conversion
- •4.3 TIMING
- •4.3.1 Interrupts
- •4.3.2 Clocks and Timers
- •4.3.3 Watch Dog Timers
- •4.3.4 Polling
- •4.4 DISPLAYS
- •5. COMPUTER INTERFACE BOARDS
- •5.1 OVERVIEW
- •5.1.1 Types
- •5.2 REGISTER LEVEL PROGRAMMING
- •5.3 EXAMPLES
- •6. COMPUTER CONTROL OF PROCESSES
- •6.1 TEMPERTURE CONTROL
- •6.2 BATCH PROCESSING
- •6.3 COMPUTER PROCESS MONITORING
- •6.4 IMPLEMENTING A COMPUTER CONTROL SYSTEM
- •6.4.1 SCADA
- •6.5 PRACTICE PROBLEMS
- •7. COMPUTER COMMUNICATIONS
- •7.1 COMPUTER COMMUNICATIONS CATEGORIES
- •7.2 THE HISTORY
- •7.3 SERIAL COMMUNICATIONS
- •7.6 GPIB/IEEE-488
- •7.7 PARALLEL COMMUNICATIONS
- •8. INTERFACING COMPUTERS FOR DATA TRANSFER
- •8.1 SERIAL DATA TRANSFER
- •8.2 PARALLEL DATA TRANSFER
- •8.2.1 GPIB Bus (IEEE-488)
- •9. COMPUTER NETWORKING
- •9.1 OSI NETWORK MODEL
- •9.1.1 Why Use A Network?
- •9.1.1.1 - Physical Layer
- •9.1.1.2 - Data Link Layer
- •9.1.1.3 - Network Layer
- •9.1.1.4 - Transport Layer
- •9.1.1.5 - Session Layer
- •9.1.1.6 - Presentation Layer
- •9.1.1.7 - Application Layer
- •9.2 OPEN SYSTEMS
- •9.3 NETWORKING HARDWARE
- •10. MANUFACTURING AUTOMATION PROTOCOL (MAP)
- •10.1 OVERVIEW
- •10.2 DETAILS
- •10.2.1 Physical Alternatives (Layer 1 OSI Model),
- •10.2.2 Data Link Layer (Layer 2 OSI Model),
- •10.2.3 Application Layer:
- •10.3 DETAILS FOR TOP
- •10.3.1 Application Layer:
- •10.5 MAP AND OTHER STANDARDS
- •10.6 AN EXAMPLE OF A MAP IMPLEMENTATION
- •10.7 ETHERNET
- •10.7.1 Internet
- •10.7.2 SLIP/PPP
- •10.8 DATA HIGHWAY+
- •10.9 REMOTE PLC I/O
- •10.10 DEVICENET
- •10.11 OTHER STUFF
- •10.12 Network Facts
- •11. DATABASE TECHNOLOGY
- •11.1 DISTRIBUTED DATABASE SYSTEMS
- •11.1.1 Relational database systems
- •11.1.2 Issues for distributed database systems
- •11.1.2.1 - Query processing
- •11.1.2.2 - Concurrency control
page 62
10.7 ETHERNET
10.7.1 Internet
10.7.2 SLIP/PPP
10.8 DATA HIGHWAY+
10.9 REMOTE PLC I/O
10.10 DEVICENET
10.11 OTHER STUFF
10.12 Network Facts
•Speeds often measured in bps (bits per second) but we are more interested in the bytes per second. There is approximately an 11:1 ratio.
T1 is 1.544 Mbps
T3 is 44.54 Mbps
•Network transmission,
baseband - single frequencyonly one station may transmit at any time (Ethernet, ARC-
page 63
net, Token ring). These must be in discrete digital packets.
boradband - multiple frequencies allow multiple simultaneous data streams. This network can reach higher speeds by multiplexing and can have continuous and/or analog channels (ISDN, CATV,ATM)
• Networks are some mix of clients and servers.
server - will share reseaources (eg, files) with many remote computers client - a computer that typically talks to a limited number of servers
•Token based networks rotate talk permissions between machines by passing a “token”
•ARCnet - a token passing network that is relatively immune to noise
•IBM token ring - a star topology token passing network
•FDDI - fiber based token passing rings that rotate in opposite directions
•Ethernet - both bus and star topologies