| 摘要 |
PROBLEM TO BE SOLVED: To shorten interrupt time of operation processing in time of program rewriting processing, in a control system. SOLUTION: This controller has two storage areas of a nonvolatile first storage area storing an operation-execution program and a volatile second storage area storing a program after a change transmitted from a maintenance terminal. When rewriting a program, the program transmitted from the maintenance terminal is stored in the second storage area while executing operation based on the program stored in the first storage area, thereafter, the operation is interrupted, and the program is transferred to the first storage area. Thereby, the interrupt time of the operation processing accompanying the program rewriting conventionally requiring several minutes is drastically shortened. COPYRIGHT: (C)2007,JPO&INPIT
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