The document provides an overview of industrial data communications technology, covering essential topics such as the OSI model, SCADA systems, and various communication protocols like RS-485 and TCP/IP. It discusses the importance of information transfer, the structure of data frames, and modern solutions such as fiber optics and fieldbus architectures. Additionally, it mentions training opportunities for those seeking further information in this field.

1. Practical Troubleshooting & Problem Solving
of Industrial Data Communications
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2. Topics
• Introduction
• Modern Instrumentation and Control
• OSI Model
• Standards
• Protocols
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3. Introduction
• Transfer of Information From One Point to
Another
• Transmitter/Receiver/Link
• Serial Links vs Parallel Links
• Digital Data vs Analog
• Mutual Agreement
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4. SCADA
• Supervisory Control and Data Acquisition System
• RTU’s to Master Station
• Radio Links /Landlines
• Also A Term Used for SCADA Software packages
such as Citect,Wonder Ware etc
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5. OSI Model
• Developed by the ISO
• Universal Framework for Building A
Communications Systems
• 7 Layer Model
• 3 Layer Model Very Common for Industry
• Missing the 8th Layer
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6. Representation of the OSI Model
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7. Basic Structure of an Information
Frame Defined
Sync
Byte
Destination
Address
Source
Address
Data to be
Transmitted
Error Detection
Byte
 SYNCHRONIZING BYTE Is Used To Synchronize The Receiver.
 DESTINATION ADDRESS Is Where The Packet Is Going.
 SOURCE ADDRESS Is Where The Packet Has Coming From.
 DATA Is The Information Contained In The Packet.
 ERROR BYTE Is The Result Of The Error Correction Calculation.
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8. Two Wire Multidrop RS-485
R
1200M (4000 FT)
TERMINATION RESISTORS AT BOTH ENDS ONLY
A A
B Rt Rt
B
TX TX
A A
B B
RX RX
R
G
G
GWG GWG
R
G
TX
RX
A
B
A
B
GWG
R
G
TX
RX
A
B
A
B
GWG
- Generator
- Receiver
- Circuit ground or
circuit common
- Protective ground or
frame ground
- Green wire ground or
power system ground
G
R
GWG
Note: The RS-485 standard documentation
leaves out the invertes for the receiver
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9. Fiber Optic Cable
Multimode
Core
Light Rays
Light Ray
Cladding
Sheath
Monomode
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10. HART Protocol
FSK Communications On Top Of 4 -
20 mA
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11. Profibus
Typical Architecture of System
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12. Foundation Fieldbus
• Newest Fieldbus
• H1 standard - 31.25kbit/s
• HSE - 100Mbit/s
• Three layers plus excellent User Layer
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13. Ethernet 10BaseT
MAC = Media Access Control
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14. TCP/IP
• Internet Protocol (IP)
• Transmission Control Protocol (TCP)
• Application Layer
• Three Layer Model
• Derived from Internet
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15. Wireless Communications
RS-232 Antenna Antenna
Radio
Transmitter/
Receiver
Radio
Transmitter/
Receiver
Modem Modem
RS-232
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16. DO YOU WANT TO KNOW MORE?
If you are interested in further training or information,
please visit:
http://idc-online.com/slideshare
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