PLC WITH MULTIPROCESSING FUNCTION AND PLC REALIZING METHOD

摘要

PURPOSE: A programmable logic controller capable of multi-processing and an embodying method thereof are provided to efficiently use a resource of a memory and reduce a downloading time by sharing a duplicate part of a program and minimizing a peculiar part thereof. CONSTITUTION: The programmable logic controller includes a program compiler(1), a program converter(9), a central processing module(8), and an input/output module(7). The program converter(9) receives each program from the program compiler(1) and compiles them into a new program having one program part and a plurality of input/output parts. The program converter(9) outputs the compiled program to an external communication device(2) in the central processing module(8). The external communication device(2) loads the new program on a memory(4) through a central processing unit(3). A timing device(5) interrupts the central processing unit(3) every determined time to time-divide a plurality of programs.