Transcript Loop Diagram Definitions

Binary Logic Systems
Chapter 6
Instrumentation
and Control Systems
Documentation
Honeywell Chapter 2
Presentation by Clifford T. Johnson, PE, Control Systems Engineer
Today
Specifications
ELC-213
Assignment , Lab & Video
Logic & Elementary Diagrams
Honeywell Chapter 2 Process Characteristics
Today
Assignment & Lab
ELC-213
Lab: Add SIS to your P&ID
Add the SIS systems that you found described in Chapter 6
To your P&ID that will shut off the water flowing
to the receiver tank if the level gets to high
There are three different methods that may be
employed to accomplish the system, but my sample drawing
uses the simplest and best method. Complete the drawing
You will lose points if the Tags & symbols are not correct
SIS Description
Lab
ELC-213
SIS Separated
Separated
SIS
ELC-213
SIS Integrated
SIS
Integrated
ELC-213
Flow Lab SIS, is there really one?
SIS
IN Lab????
ELC-213
Download P&ID-SIS dwg
SIS
IN Lab????
ELC-213
SIS dwg
SIS
IN Lab????
ELC-213
Use P&ID dwg & add SIS
SIS
IN Lab????
ELC-213
Motor Start Stop
Motor
Logic
ELC-213
Logic Diagram with ISA Symbols
ISA
Logic
ELC-213
Topic
Honeywell
Chapter 2
Page
2.1 Overview
11
Introduction
12
The Instrumentation
12
The Process
12
Two Effects for Consideration
12
2.2 Process Load
Honeywell
13
Definition
13
Effect on the Final Control Element
13
Properties of Load Changes
13
2.3 Process Lags
14
What are They?
14
Control Systems
Example
ELC-213
14
Topic
Honeywell
Chapter 2
Page
2.4 Capacitance Definition
15
Illustrations
15
Principles of Large Capacitance
16
Effects of Large Capacitance
16
Heater Example
16
Dimensional Units for Capacitance
17
2.5 Resistance Definition
18
When do you see Resistance?
18
High Thermal Vs Low Thermal resistance
18
Dimensional Units for Resistance
18
2.6 Dead Time Definition
Honeywell
ExampleControl
of DeadSystems
Time
19
ELC-213
19
Honeywell Chapter 2
Capacitance
Honeywell
Control Systems
ELC-213
Honeywell Chapter 2
Resistance
Honeywell
Control Systems
ELC-213
Honeywell Chapter 2 Dead Time
Honeywell
Control Systems
ELC-213
Honeywell Chapter 2 Lag
Honeywell
Control Systems
ELC-213
Homework ASSIGNMENT
Find an example of an SIS (SIL) for a level
control system on the web and email the
link to me
Email subject Ex:
File name Ex:
Johnson-SIS Link-AD
Johnson-SIS-P&ID-AD.vsd or dwg
You will lose 1-3 points for incorrect subject
Subjects
Assignment
ELC-213
The End
End
Instrumentation
ELC-213