Device and method for data real-time processing of Piel's system

摘要

The present invention relates to a data input / output real-time processing apparatus and method in a PIEC system. In the prior art, since a time point used for reading or computing input data and a time for outputting an operation result are sequenced, If the data is used at the last time point (c) of the user program, the data is already in the past, and the result calculated at the first time point (a) of the user program is output after the last calculation is finished. The result also becomes a past data in time, and the reality is lost. Accordingly, the present invention provides a system comprising: a main processor for controlling overall operation of the entire system; A ROM for storing main information of the system and a main word program; A RAM that stores data and user programs that are frequently referred to by the processor; A controller for executing a user program stored in the RAM; An input unit for receiving data necessary for executing a user program from the outside in the control unit; An output unit for outputting a result of the operation after the user program is executed by the control unit; And a buffer unit for temporarily storing data between the control unit and the input unit and the output unit so as to read the data at a time when the input data is needed during the execution of the user program, Output data can be processed in real time as well as the execution cycle can be reduced, thereby improving the performance of the system.