JPS6083449A - Detection system for abnormal state in polling interval - Google Patents

Abstract

PURPOSE:To detect the abnormal state of a device to be monitored by storing the abnormal state of a telecon/telemeter device in a memory and transferring it to a master station during polling. CONSTITUTION:A slave station 1 stores state variation of the device to be monitored at the polling interval in a nonvolatile memory 10 together with time data. Its storage contents are transferred to the master station 2 during polling together with the state in the polling. Therefore, the abnormal state of the monitored device which is generated and recovered at the polling interval is detected.

Description

Detailed Description of the Invention (a) Technical Field of the Invention The present invention relates to a teleconverter/telemeter device that uses a polling method to transfer data from a slave station to a master station. The present invention relates to an abnormal state detection method during a polling interval that can detect an abnormal state of a monitoring device.

(b) Prior Art and Problems Conventional teleconverter/telemeter devices use a polling method to call a slave station from a master station, and when the slave station calls, the slave station transmits information collected from a sensor that detects the status of the monitored device to the master station. received and processed it.

Therefore, an intermittent failure or the like in the monitored device that occurs during the polling interval and is recovered will disappear even if the sensor sends the information to the slave station, and the master station will not be able to detect it. As a solution to this problem, there is an automatic start-up method that calls the master station when a status change is detected from the slave station, but this method requires measures to avoid call conflicts, etc.
There are drawbacks such as the telemeter device being complicated and uneconomical.

(C) Purpose of the Invention The purpose of the present invention is to eliminate the above-mentioned drawbacks (in order to eliminate the above-mentioned drawbacks), the slave station is equipped with a non-volatile memory and a clock, and information from the sensor is stored in the non-volatile memory at the time of occurrence of a state change. 1.
An object of the present invention is to provide an abnormal state detection method during a polling interval that allows a master station to record the contents of the state change by transferring the contents of a to the master station at the time of polling together with the status at the time of polling.

(d) Structure of the Invention The structure of the present invention is that in a teleconverter/telemeter device that collects data using a polling method, a slave station is provided with a nonvolatile memory and a clock, and an abnormal state obtained from a sensor is detected. The generation time and the recovery time are stored in a non-volatile memory, and the contents of the non-volatile memory are transferred to the master station at the time of polling.

(e) Examples of the invention The figure is a block diagram of a circuit showing one embodiment of the present invention.

The slave station 1 includes a processor 4 that controls the entire slave station 1, and a ROM that stores a program that controls the operation of the processor 4.
9, an analog input circuit 5 for receiving an analog signal input from the sensor of the monitored device via terminal A, a digital input circuit 6 for receiving a digital signal input from the sensor of the monitored device via terminal B, and from terminal C. A control signal sending circuit 7 that sends control signals to the monitored device, a clock 8 that indicates the time when a change in the state of the monitored device occurs, and a non-volatile clock that stores signals sent from the sensors of the monitored device via terminals A and B. It consists of a digital memory 10 and a line control circuit 11 that sends and receives signals to and from the master station 2 via the line. However, the control signal sending circuit 7 is implemented only in the teleconverter and is not used in the telemake device. The processor 4 reads a program from the ROM 9 and operates. Processor 4 Analog input circuit 5
and the signals from the sensors of the monitored device that enter through the digital input circuit 6 are stored in the memory 10.

At this time, since the signal from the sensor indicates the occurrence and/or recovery of the abnormal state of the monitored device, Process 7 The 4
reads the time at which the signal was received from the clock 8 and simultaneously adds it to the signal and stores it in the memory 10. Since the memory 10 is non-volatile, the stored contents are retained even if the slave station loses power. When the processor 4 detects a polling signal sent from the master station 2 via the line control circuit 11, it collects the data collected and stored in the memory 10 and the input signals of the analog input circuit 5 and digital input circuit 6 at the time of polling detection. is transferred to the master station 2 via the line control circuit 11. When the processor 4 transfers the contents of the memory 10 to the master station 2, the processor 4 transfers the contents of the memory 10 to the master station 2.
Clear and prepare for the next data collection. The master station 2 prints the data sent via the line control circuit 11 on the printer 3, distinguishing between the contents stored in the memory 10 and the state of the monitored device at the time of polling.

(f) As described in detail, the present invention records changes in the state of a monitored device during a polling interval in a non-volatile memory in a slave station with time added, and the contents of the memory are recorded by polling from a master station. It is possible to detect an abnormal state of the monitored device that occurs during the polling interval and then recovers! It becomes jshi.

[Brief explanation of drawings]

The figure is a block diagram of a circuit showing one embodiment of the present invention. 1 is a slave station, 2 is a master station, 3 is a printer, 4 is a processor,
5 is an analog input circuit, 6 is a digital input circuit, 7 is a control signal sending circuit, 8 is a clock, 9 is a ROM, 10 is a memory, and 11 is a line control circuit.

Claims (1)

[Claims] In a teleconverter/telemeter device that collects data using a polling method, a slave station is equipped with a non-volatile memory and a clock, and the abnormal state obtained from the sensor is stored in the non-volatile memory with the time of occurrence and recovery time attached. and transferring the contents of the nonvolatile memory to a master station during polling.