LADDER DIAGRAM RATIONALITY INSPECTION DEVICE
PROBLEM TO BE SOLVED: To detect an irrational circuit or a redundant circuit in a ladder diagram program.SOLUTION: A route extraction unit 11 extracts all of the routes from a left bus bar to a coil on the basis of element information of a ladder diagram storage unit 21. An extraction unit 12 of sig...
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| Format: | Patent |
| Sprache: | eng ; jpn |
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| Zusammenfassung: | PROBLEM TO BE SOLVED: To detect an irrational circuit or a redundant circuit in a ladder diagram program.SOLUTION: A route extraction unit 11 extracts all of the routes from a left bus bar to a coil on the basis of element information of a ladder diagram storage unit 21. An extraction unit 12 of signal duplication on each route inspects duplication of a signal name (contact name) on each route. When a duplicate signal name can be extracted, a rationality determination unit 13 compares the contact types with each other, and, when there is a difference between the contact types (A contact and B contact), determines that the route is irrational (not ON).
【課題】ラダー図プログラムについて不合理な回路や冗長な回路を検出する。【解決手段】経路抽出部１１は、ラダー図格納部２１の要素情報に基づいて、左母線からコイルに至る経路を全て抽出する。経路毎信号重複抽出部１２は、各経路毎に、その経路上の信号名（接点名）の重複を調べる。重複した信号名を抽出できた場合、合理性判定部１３が、その接点種類を比較し、接点種類が異なっている場合（Ａ接点とＢ接点）、その経路は不合理である（ＯＮにならない）と判定する。【選択図】図１ |
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