| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem in a conventional operation permission device, in which the state of a main contact is outputted by operating a switch, that the output states of two contacts is often mismatched depending on the manner of pressing the switch, which might hinder the continuation of operation. SOLUTION: In this reliable operation permission device of automatic machine, in case of a mismatching of contact signal inputs, its duration is counted, and when the duration is short, an operation such as re-operation for matching the signals is urged by outputting a mismatching warning, whereby the operation can be continued without interruption. When the duration is long, failure detection is performed by outputting the mismatching warning. COPYRIGHT: (C)2005,JPO&NCIPI
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