Monitoring system and temperature controller

Abstract

The present invention provides a monitoring system comprising a display device, an abnormality detection means for monitoring an object and when detecting an abnormality of the monitored object, outputting an abnormality signal, and a display control means for causing the display device to present an abnormality display, further comprising a latch means for retaining the output state resulting from receipt of an abnormality signal, thereby continuing to output a latch signal until reset, and a reset device for resetting the latch device, wherein the display control device determines in what manner the display device presents an abnormality display, depending on whether an abnormality signal and a latch signal are each transmitted or not.

Description

technical field [0001] This invention relates to a monitoring system for a temperature controller etc. to monitor an object and display information on the state of the monitored object on a display device incorporated therein. Background technique [0002] Japanese Patent Application Laid-Open Publication No. 2004-126732 (referred to as Patent Document 1) discloses a temperature controller for controlling the temperature of various temperature environments. The disclosed temperature controller has the function of obtaining a control output (MV value) to be supplied to a heating device based on an object temperature (PV value) and a set temperature (SP value) detected by a temperature sensor such as a thermocouple or a resistance thermometer. The function of controlling the temperature of the object, while giving the digital display of the detected temperature. Generally, this type of temperature controller also has the ability to detect abnormalities, and when detecting abn...

AI Technical Summary

Problems solved by technology

In such a temperature controller, however, unless event information supplied from the temperature controller to the outside is monitored by an external device such as a main control device, a malfunction cannot be identified

In addition, unless the latch circuit holding the output state resulting from the reception of the abnormality detection signal is reset, even when the failure of the body of the temperature controller has passed and the output of the abnormality detection signal stops, the transmission of event information continues

This prevents a precise grasp of the current situation

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