Patent
Fault diagnosing device for sequence machine
TLDR
In this paper, the authors propose to detect assuredly the presence or absence of a fault by storing all normal working states during a cycle of a sequence machine and comparing these working states with a memory every time the working state of the sequence machine varies.Abstract:
PURPOSE: To detect assuredly the presence or absence of a fault by storing all normal working states during a cycle of a sequence machine and comparing these working states with a memory every time the working state of the sequence machine varies. CONSTITUTION: The working state of a sequence machine A is fetched to a fetching means B for each change of said working state. While a memory means C stores previously all normal working states during a cycle of the machine A. A comparing means D compares the data of the means C with that of the means B. When the coincidence is obtained from this comparison, it is decided that the machine A is normally working. While a fault is decided when no coincidence of comparison is obtained. Then a fault signal is delivered to detect early the fault. Thus it is possible to detect a fault early by a simple device and to recover the fault in a short time. This improves the working efficiency of a fault diagnosing device. Such a device is suitable used to a lift, conveyor, etc. COPYRIGHT: (C)1984,JPO&Japioread more
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