PLC Programming

  1. Fundamentals of Programmable Logic Controllers
    1. Definition and Core Purpose of PLCs
      1. Evolution from Relay Logic to PLCs
        1. Key Advantages of PLCs
          1. Space and Wiring Reduction
            1. Simplified Troubleshooting
              1. Programming Flexibility
                1. System Integration Capabilities
                  1. Cost Effectiveness
                    1. Reliability and Durability
                    2. Essential Components of PLC Systems
                      1. Central Processing Unit
                        1. Power Supply Unit
                          1. Input/Output Modules
                            1. Programming Device
                              1. Communication Interfaces
                                1. Memory Systems
                                2. PLC Operating Principles
                                  1. The Scan Cycle Concept
                                    1. Input Scan Phase
                                      1. Reading Physical Inputs
                                        1. Updating Input Image Table
                                        2. Program Execution Phase
                                          1. Logic Evaluation Process
                                            1. Instruction Processing
                                            2. Output Update Phase
                                              1. Updating Output Image Table
                                                1. Driving Physical Outputs
                                                2. Housekeeping Operations
                                                  1. System Diagnostics
                                                    1. Communication Processing
                                                      1. Internal Maintenance Tasks
                                                    2. PLC vs Other Control Systems
                                                      1. Performance Comparisons
                                                        1. Application Suitability
                                                          1. Cost Analysis

                                                        Previous

                                                        1. Introduction to Industrial Automation and Control Systems

                                                        Go to top

                                                        Next

                                                        3. PLC Hardware Architecture and Components