1. Intro to Digital Control Test # 2 - Agenda
Activity
Estimated Time
1. Agenda 5
2. Test 50
BREAK 10
3. Learning Objectives
4. Introduction: A Brief History 30
5. Analog vs. Digital 20
6. Conversion 40
7. Summary and Wrap-Up
8. Additional Activities
9. Lab Activity
Slide 1
Instrumentation 2 – Session 9

2. Session 9 - Objectives Explain the purpose of digital control
In general terms, describe the difference between analog and digital controllers
Define the following terms associated with process control schemes:
analog
D to A
discreet controllers
A to D
DCS
converter
PLC
multiplexer
input
demultiplexer
output
In general terms, describe how a digital controller transmits an output signal to an analog final control element.
In general terms, describe how an analog controller transmits to a digital controller
Slide 2
Instrumentation 2 – Session 9

3. Early Automation
Slide 3
Instrumentation 2 – Session 9

4. Analog Electronic Instrumentation
Slide 4
Instrumentation 2 – Session 9

5. Early Computer Control
Slide 5
Instrumentation 2 – Session 9

6. Distributed Control Systems
Slide 6
Instrumentation 2 – Session 9

7. Programmable Logic Controllers
Slide 7
Instrumentation 2 – Session 9

8. Exhibit 1: Schematic view of MUX/ DEMUX
To Field Devices
Controller
MUX
Field Inputs
Slide 8
Instrumentation 2 – Session 9

9. Analog and Digital Instruments
Slide 9
Instrumentation 2 – Session 9

10. Analog and Digital Signals
Slide 10
Instrumentation 2 – Session 9

11. Analog and Digital Instruments
Slide 11
Instrumentation 2 – Session 9

12. Analog and Digital Signals
Slide 12
Instrumentation 2 – Session 9

13. Digital Controller/Control Valve Connection
Set Point
Actual Process Value
D/A
Control
Valve
I/P
Slide 13
Instrumentation 2 – Session 9

14. Signal Transmission from a transmitter to a Digital Controller
Electrical
Transmitter
A/D
Digital Controller/Control Valve Connection
A/D
Digital
Controller
P/I
Converter
Pneumatic
Transmitter
Slide 14
Instrumentation 2 – Session 9