| 摘要 |
<p>A programmable controller that facilitates investigation when a sequence program is investigated. When the ladder diagram of the sequence program is displayed, the ladder diagrams of main programs and the executed subprogram are displayed with normal brilliance. The ladder diagrams of unexecuted subprograms are displayed with low brilliance. Therefore, when the ladder diagrams are displayed, it is possible to easily recognize whether the subprograms have been executed or not, which facilitates the investigation of the sequence program.
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