| 摘要 |
PROBLEM TO BE SOLVED: To easily and efficiently achieve the write-in and erasure of a connection line in a ladder diagram. SOLUTION: A ladder diagram edition system is provided to perform the display operation of a writable line WL and an erasable line EL by a keyboard or mouse operation, and to easily and efficiently perform the write-in and erasure of a connection line based on those lines. COPYRIGHT: (C)2009,JPO&INPIT
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