JPH033010A - Inference control method for monitoring controller - Google Patents

Abstract

PURPOSE:To effectively use a CPU by including an abnormality deciding function and a function for generating an event at the time of deciding abnormality in a device to be controlled, and at the time of receiving the event, executing inference. CONSTITUTION:The device 12 to be controlled is provided with a processing part 13, which decides whether the device 12 is in an abnormal state for executing inference or not and transmits a group of data expressing time, a device and a state at the time of deciding the abnormal state. At the time of receiving the group of data from the device 12, a monitoring controller 11 executes inference. Namely, data for starting inference are sent to the controller 11 only when the device 12 goes a certain specific state such as abnormality. Consequently, the execution of useless sampling and status decision is made unnecessary and the CPU can be effectively utilized.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention relates to an inference control method for a supervisory control device having an inference mechanism therein.

B0 Summary of the Invention The present invention provides an inference control method for a supervisory control device equipped with an inference mechanism internally, in which an abnormality determination function and a function to generate an event at the time of the abnormality determination are provided in the controlled device, and when the event is received, By performing inference, unnecessary sampling and status determination can be avoided on the monitoring and control equipment side.
This allows the CPU to be used effectively.

C3 Conventional technology Monitoring side 3 that monitors and controls the state of the controlled device, detailed description of the invention In the control device, real-time performance is required. When monitoring and controlling equipment using a production system, conventionally, a certain sampling period is set, and the third sampling period is set within that period.
As shown in the figure, data acquisition, status determination, inference, etc. were performed on the monitoring and control device l side. In FIG. 3, 2 is a device to be controlled.

D0 Problems to be Solved by the Invention When using the sampling method as described above, correct monitoring and control cannot be performed if data acquisition, state determination, inference, etc. cannot be completed within the sampling time. Therefore, the execution of the above-mentioned inference etc. needs to be completed within the sampling time, but for this reason, the CPU for execution must operate efficiently. Furthermore, if the sampling period is extended in order to perform correct monitoring and control, there is a problem that real-time performance is not satisfied. Also the third
In the configuration shown in the figure, even when inference is not performed, data acquisition and status determination must be performed on the monitoring and control device l side.
You end up wasting your time using CPtJ. In other words, inferences are not performed constantly, but are performed when the situation calls for inference.

The present invention has been made in view of the above points, and its purpose is to:
To provide an inference control method for a supervisory control device that eliminates wasteful use of a CPU by preventing the supervisory control side from processing data that does not need to be inferred.

E9 Means and operation for solving problem The present invention provides an inference control method for a supervisory control device which has an inference mechanism therein and monitors and controls the state of a device to be controlled. A function for determining whether or not the device is in an abnormal state in which inference should be performed, and a function for transmitting a set of data representing the time, device, and state when the abnormal state is determined, and the monitoring The invention is characterized in that the control device performs inference when receiving the data.

F. Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing the configuration of an embodiment, in which a controlled device 12 performs processes such as data acquisition and status determination that were conventionally performed by a monitoring and control device. That is, the controlled device 12 is provided with a processing unit 13, and this processing unit 13 determines whether or not the device 12 is in an abnormal state in which inference should be performed.
The device sends a set of data representing its status. The supervisory control device 11 executes inference when the set of data is transmitted from the controlled device 12 (when an event occurs). A set of data that the supervisory control device 11 receives upon occurrence of an event is shown, for example, as shown in FIG. In this way, data for activating inference is sent to the supervisory control device 11 only when a specific state such as an abnormality occurs, and unlike conventional sampling control, this eliminates unnecessary sampling and state judgment. CPU
can be used effectively.

G1 Effects of the Invention As described above, according to the present invention, since the controlled device is provided with a state determination function and a function of transmitting data for activating inference, inference is activated when there is an abnormal state in which inference should be executed. This allows the CPU to be used effectively.

Figure 1 Example block diagram

[Brief explanation of drawings]

Fig. 1 is a block diagram showing an embodiment of the present invention, Fig. 2 is a block diagram showing an example of transmission data according to the embodiment, and Fig. 3 is a block diagram showing a conventional example. . ...Monitoring control device, 2...Controlled device, data explanatory diagram/processing unit. (Valve does not operate)) Two-person supervisory control device outside the conventional block diagram Controlled device

Claims (1)

[Claims] (1) In an inference control method for a supervisory control device that has an inference mechanism inside and monitors and controls the state of a device to be controlled, an abnormal state exists in the device to be controlled that should cause the device to perform inference. and a function to transmit a set of data representing the time, device, and state when the abnormal state is determined, and when the monitoring and control device receives the data, it makes an inference. An inference control method for a supervisory control device, characterized by carrying out the following steps.