CONTROL UNIT, DATA REFRESHING METHOD, DATA REFRESHING PROGRAM

摘要

A control unit (10) includes: a memory (102); a computation control part (101); and an input and output unit (103) for connecting the computation control part (101) to a device of an (FA) system. A system program (120) includes a data refresh program for executing a data refresh of data (120D) of the device and the control data of the memory (102) via the input and output unit. If the computation control part (101) receives a change of a control program (120C), the computation control part (101) stops executing the control program (120C). The computation control part (101) executes the change of the control program (120C) while executing a part of the system program (120S) including the data refresh, and resumes executing the control program (120C).