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Basics of PLC Programming - Coggle Diagram
Basics of PLC Programming
Processor Memory Organization
Program Files
Main Ladder Program
Organized in rungs
Scanned sequentially
Contains executable ladder logic
Subroutine Files
Modular program structure
Called from main program
Improves organization
Interrupt Files
Triggered by events
Used for time-critical tasks
Overrides normal scan
Data Files
Input Data File
Updated during scan cycle
Represented as input image table
Stores status of input devices
Output Data File
Controls field devices
Represented as output image table
Stores output status bits
Internal Data Files