Programmable Logic Control
The Programmable Logic Control, PLC, is the automation component for controlling the execution sequence of machines or production processes. In the CNC system, the PLC has the task of controlling the mechanical behavior of the machine with the exception of axis control. In this chapter, the general architecture, function, and behavior of a PLC will be addressed and the role and characteristics of PLCs in the CNC system will be described. Also, IEC-1311-3, the international standard PLC programming language, will be introduced and Soft-PLC will be introduced. Finally, with respect to the design of a PLC system, the architecture and execution conditions will be described and an executor of a PLC program will be implemented.
KeywordsFunction Block Ladder Diagram Programmable Logic Control Access Path Function Block Diagram
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