APPLICATION PROGRAM INPUT METHOD USING FLOW CHART TYPE GRAPHIC LANGUAGE FOR PROGRAMMABLE CONTROLLER

摘要

PURPOSE:To reduce the man power for production of programs by using a flow chart type graphic language and therefore attaining a direct input while producing a flow chart without no coding operation. CONSTITUTION:A CPU1 controls the execution of various types of utility programs which are stored in an RAM2. The RAM2 also contains an interpreter which converts an instruction using a flow chart type graphic language into a machine word. A keyboard 3 serves as a flow chart input device for programmer, and a keyboard interface 4 decodes the input signal given from the keyboard 3 and sends the necessary information to the CPU1. The CPU1 processes the key input by the input signal sent from the keyboard 3 and executes each time a display program, an interpreter, a recording program, etc. in time division and controls the conversion and store of displays and instructions as well as the input processing.