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Topic under PLC (Programmable Logic Controller)
Source: migas-indonesia.net
File size: 532 KB
File type: pdf
Last download on:
Wed Jun 19, 2013 11:37:07 PM
Short Desciption:
The design of programmable controllers includes a number of rugged
features that allow PLCs to be installed in almost any industrial environment.
Although programmable controllers are tough machines, a little foresight
during their installation will ensure proper system operation. In this
handbook, we will explore PLC installation, explaining the specifications for
proper PLC component placement and environment. We will also explain
other factors that affect PLC operation, such as noise, heat, and voltage. In
addition, we will discuss wiring guidelines and safety precautions. Although
proper PLC installation leads to good system operation, no programmable
controller system is without faults. Therefore, we will investigate proactive
maintenance techniques, as well as reactive troubleshooting processes. When
you finish, you will understand the fundamentals of PLC start-up and
operation.
Summary:
1 PLC SYSTEM LAYOUT .4
PANEL ENCLOSURES AND SYSTEM COMPONENTS 4
2 POWER REQUIREMENTS AND SAFETY CIRCUITRY13
POWER REQUIREMENTS13
SAFETY CIRCUITRY14
3 NOISE, HEAT, AND VOLTAGE REQUIREMENTS 17
4 I/O INSTALLATION, WIRING, AND PRECAUTIONS.24
I/O MODULE INSTALLATION.25
WIRING CONSIDERATIONS.25
WIRING PROCEDURES25
SPECIAL I/O CONNECTION PRECAUTIONS 26
5 PLC START-UP AND CHECKING PROCEDURES30
STATIC INPUT WIRING CHECK .31
STATIC OUTPUT WIRING CHECK 32
CONTROL PROGRAM REVIEW 33
DYNAMIC SYSTEM CHECKOUT .33
6 PLC SYSTEM MAINTENANCE 34
PREVENTIVE MAINTENANCE .35
SPARE PARTS 36
REPLACEMENT OF I/O MODULES .36
7 TROUBLESHOOTING THE PLC SYSTEM 36
TROUBLESHOOTING GROUND LOOPS 36
DIAGNOSTIC INDICATORS 38
TROUBLESHOOTING PLC INPUTS .38
TROUBLESHOOTING PLC OUTPUTS 40
TROUBLESHOOTING THE CPU .40
SUMMARY OF TROUBLESHOOTING METHODS.41
STUDY GUIDE 43
REVIEW QUESTIONS 45
ANSWERS51
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"PLC Start-Up and Maintenance"
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