EXTENSION UNIT FOR PROGRAMMABLE CONTROLLER, METHOD FOR PROCESSING EXTENSION UNIT, CONTROL UNIT FOR PROGRAMMABLE CONTROLLER, AND METHOD FOR PROCESSING CONTROL UNIT

摘要

PROBLEM TO BE SOLVED: To obtain data by analyzing the frequency of an analog signal by a programmable controller(PC) extension unit or a PC control unit.;SOLUTION: The PC extension unit is constituted of an envelop processing circuit part 12 for executing the envelop processing of an analog input signal, a fast Fourier transform part 14 for executing fast Fourier transform processing for an output signal from the circuit 12, an IF circuit part for transmitting data obtained by frequency analysis based on the fast Fourier transform processing to the PC control unit, and so on. Or the PC control unit itself is provided with the envelop processing circuit part and the fast Fourier transform part and so on.;COPYRIGHT: (C)2001,JPO