METHOD FOR FILTERING SOFTWARE OF PLC SYSTEM, ESPECIALLY A USER SETS THE NUMBER OF FILTERING ACCORDING TO ENVIRONMENT

摘要

PURPOSE: A method for filtering a software of a PLC system is provided which is appropriate for optimum selection driving in control speed and reliability of the system. CONSTITUTION: According to the method for filtering a software of a PLC system, the number of filtering is set from a user(ST1). First read data from data inputted through a data bus is set as reference data, and the number of coincidence is accumulated if data read again is equal to the reference data after a fixed time(ST2). If the accumulated coincidence number of data is smaller than the set filtering number, the data is read again. And if the accumulated coincidence number of data is equal to the set filtering number, it is recognized as correct data(ST3).