| 摘要 |
PURPOSE:To store another operation data even when a main central arithmetic processing means is being operated, and to execute an operation continuously from an operation of the present processing data, by storing an arithmetic data in as storage means which has been switched under a control of an external command by a switching means. CONSTITUTION:When storing a sub-program being a new program, an external command makes a bus switching means 4 execute switching of a bus 8 through an I/O part 7, and by the bus 8, a sub-program storage means 3, a peripheral equipment interface part 5 and a program generating means 6 are placed under a control of the external command. The program generating means 6 generates a sub-program, continuously from the main program, a normally opening contact instruction NO is closed, a program change instruction is inputted to the main central arithmetic processing means 1, and it is operated automatically by the sub-program continuously from the main program.
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