Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Hitachi Ltd
Original Assignee
Hitachi Ltd
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Filing date
Publication date
Application filed by Hitachi LtdfiledCriticalHitachi Ltd
Priority to JP7687975ApriorityCriticalpatent/JPS521386A/en
Publication of JPS521386ApublicationCriticalpatent/JPS521386A/en
G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
G08C25/00—Arrangements for preventing or correcting errors; Monitoring arrangements
Landscapes
Physics & Mathematics
(AREA)
General Physics & Mathematics
(AREA)
Selective Calling Equipment
(AREA)
Abstract
PURPOSE:The abnormality of the selective relay contact itself directly connected with an apparatus is detected in case of normal non-control, beforehand preventing the false control of the control circuit.
JP7687975A1975-06-241975-06-24Abnormal detecting device of a distant monitor controller
PendingJPS521386A
(en)