Operation status diagnosing device for external control means

Abstract

Provided is an operation status diagnosing device for an external control means, which is enabled by a simple constitution to perform the transmission of the drive status of an external control means constituted of either a relay contact to be activated by an ON / OFF signal or an ON / OFF means made of a semiconductor, and the transmission of a signal indicating the occurrence of troubles such as disconnection or shorting of a wiring line and the transmission of an electric power by a common means, thereby to prevent the rise of a production cost due to the increase in a parts count or the complexity of a circuit constitution and to diagnose the transmission of the signal and the soundness of the circuit precisely. The operation status diagnosing device for the external control means is constituted to comprise a second switch circuit for turning ON / OFF an alternating voltage generating means output in response to the drive signal of the external control means, thereby to apply that output to an insulating transformer primary side, a first switch circuit serving as an external control means connected with an insulating transformer secondary side, so that it is turned ON / OFF by the second switch circuit, an external control means operation status detecting circuit connected with the insulating transformer secondary side, so that an electric current flows therethrough when the first switch circuit is ON, and a measuring means connected with the second switch circuit, for measuring the electric current to flow to the insulating transformer primary side.

Description

technical field [0001] The present invention relates to a device for diagnosing the operating state of an external control unit, in particular to an operating state diagnosing device for an external control unit as follows: The relay contact of the unit, which operates according to the on / off binary signal, or the on / off unit made of semiconductors accurately transmits signals, and the wiring of the circuit does not cause disconnection, short circuit, etc. The soundness of the circuit sexual diagnosis. Background technique [0002] As a control unit used in the control of machinery and equipment, there are relay contacts as external control units or on / off units made of semiconductors that operate according to on / off binary signals. In order to prevent the influence on the human body or avoid the influence of noise, etc. according to the application, such an external control unit generally, for the signal transmitted from the pointing side to the machine side, the signal of...

AI Technical Summary

Problems solved by technology

[0015] However, the techniques shown in these Patent Documents 1 and 2 are related to the detection of electric wire disconnection, but require a pulse signal applying unit, a storage device for a reference current waveform, etc., and the electric circuit diagnostic device shown in Patent Document 3 requires A memory that stores the measurement results of the characteristics of electrical equipment and information related to the measurement requires a comparison unit for the measurement of the characteristics of the circuit and the state diagnosis, etc., and has a complicated structure, so it cannot be a solution to the problems shown in A to C above.

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