DRIVE DEVICE AND METHOD OF DOT MATRIX NUMERIC DISPLAY

摘要

PURPOSE: A drive device and a method of dot matrix numeric display are provided to continuously generate a command making a stable time(tw) required to a latch enable signal and a command generating a rising edge without adding a separate hardware while decreasing the number of outputs of a programmable logic controller and transfer the commands to the numeric display through the PLC. CONSTITUTION: The drive device of dot matrix numeric display comprises a main computer(100), a programmable logic controller(110), a plant(120), an ethernet network(150), a numeric display assembly(140) and a main control board(130). The input variable of the plant(120) is read through the programmable logic controller(110). The read variable is transferred to the main computer(100) through the ethernet network(150). Then, a signal processing calculation in the main computer(100) is performed and then the calculated result is directly transferred to an output of the programmable logic controller(110) to drive the numeric display.