| 摘要 |
PROBLEM TO BE SOLVED: To easily read/write a lot of kinds of data groups in spite of the capacity limit of a memory provided inside a device and to easily prepare filing data in a program expression display device capable of displaying corresponding to the control state of an external device. SOLUTION: A data block storage area 16 provided with plural data blocks capable of storing an aggregate 14 of data is set on a memory 15, the aggregate 14 of data read out of the side of an external device 10 corresponding to preset conditions is successively written into empty blocks inside the data block storage area 16 on the side of a display device 13 so as to be preserved and data are exchanged between the data block storage area 16 and an external recording medium 17.
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