PLC (Programmable Logic Controller)
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Last download on: Wed Jun 19, 2013 11:37:07 PM
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.
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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