JPS6365510A - Plant controller - Google Patents

Abstract

PURPOSE:To capture the state of the inside of a plant controller in the whole of the controller, by processing data to be used in the monitor, or the control of a plant, and displaying a processed result on a display with the state drawing of the plant controller prepared in advance. CONSTITUTION:A display controller 1A fetches a various kinds of data which represent the states of the inside of the controller 1, through a signal line 2, and performs the arithmetic processing on them at an arithmetic part 12A, and calculates prescribed engineering values by converting them to codes possible to be displayed on the display 1B, or, applying format conversion on them. And the engineering values as an arithmetic-processed result, are displayed on the display B, with the state drawing of the plant controller stored in advance in a memory 11A. A graphics displayed on the display device 1B is the one displaying the data representing, for example, the state of the inside of the controller 1 corresponding to each position of a block diagram, that is the state diagram of the plant controller.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a plant control device that monitors or controls various plants, and in particular to processing and displaying various monitoring and control signals used in the plant control device. The present invention relates to a plant control device that displays information on a device.

[Conventional technology]

A conventional plant control device will be explained using FIG.

Figure 3 is a configuration diagram of a conventional plant control device. In the figure, 1 is a control device that monitors and controls the plant;
2 is a signal line that takes out various data output from the control device 1; 3 is a trend recorder connected to the signal line 2 and displays a trend on a recording paper based on the data from the control device 11; 4 is a signal line vA2; This is an indicator that is connected to the control device 1 and is composed of a meter or the like that displays data based on data from the control device 1.

Here, the trend pen recorder 3 and the indicator 4 constitute an output device that outputs the monitoring and control status of the plant.

Next, the operation will be explained.

The control device 1 monitors and controls the plant, and at this time, the control device 1 monitors and controls, for example, set values of process quantities, controlled variables, control outputs for PID control,
It has data representing internal conditions such as bias value function output, and based on this data, trends can be displayed on the recording paper of the trend recorder 3, or set values and measured values can be displayed on the indicator 4. do.

In this case, the trend recorder 3 is used offline for tuning, failure analysis, etc. The trend recorder is used to draw various important variables and understand the trends, which is useful for tuning the control device, and the indicator 4 is used to record set values and controlled variables. Displayed in pairs, it is useful for monitoring 1 manual operation during automatic operation.

[Problem that the invention seeks to solve]

Conventional plant control equipment is configured as described above, so in order to understand the internal status in detail, it is necessary to connect a new signal line and draw it on the trend recorder, and the display format is also a graph. It was difficult to grasp the overall internal state of the control device. The set value can also be determined by an indicator, etc.

Although it is possible to display controlled variables, it is difficult to understand the internal state in detail.

This invention was made in order to solve the above-mentioned problems, and the purpose is to obtain a device that can display the internal state of a control device in detail and understand the overall state, which is useful for tuning, monitoring, and failure analysis. do.

[Means for solving problems]

For this reason, the present invention is characterized in that it is equipped with a display control device IA that performs arithmetic processing on data used for plant monitoring and control, and displays the processed results on a display device IB together with a state diagram of the plant control device prepared in advance. That is.

[Effect]

The display control device IA of the present invention performs arithmetic processing on signals used for monitoring and controlling the plant, and displays the processed results on the display device IB together with a state diagram of the plant control device prepared in advance.

〔Example〕

An embodiment of the present invention will be described below based on the drawings.

FIG. 1 is a block diagram showing an embodiment of the present invention. In the figure, IA performs arithmetic processing on data used for plant monitoring and control, and the processed results are presented together with a state diagram of the plant control device prepared in advance. a display control device that displays on a display device;
IB is a display device composed of a CRT or the like that displays the results of arithmetic processing of the state diagram based on the display control device IA.

Here, the display control device IA has a memory section 11A that stores a state diagram of the plant control device in advance, and a calculation section 12A that processes signals used for monitoring and controlling the plant.

Next, the operation will be explained.

The display control device IA takes in various data representing the internal state of the control device 1 from the control device 1 via the signal line 2,
The arithmetic unit 12A performs arithmetic processing, converts it into a code that can be displayed on the display device IB, or converts the format to calculate a predetermined engineering value. The engineering value as a result of this arithmetic processing is stored in advance in the memory section 11A and displayed on the display device 1B together with the state diagram of the plant control device.

The graphical figures displayed on the display device IB include, for example, process quantities representing the internal state of the corresponding control device 1 at each location of the block diagram, which is a state diagram of the plant control device, as shown in FIG. It displays data representing various internal states such as set values, controlled variables, control outputs for PID control, and bias value function outputs.

In this case, the display on the display device IB by the display control device IA is performed at the request of the operator.

In the above embodiment, the block diagram of the entire plant control device is displayed on the display device, but if the control device is divided into several control blocks, you can see which control block is currently operating or which control line is connected. In the case of branching, it is also possible to clearly indicate which bus is controlling.

Furthermore, in the above embodiments, monitoring of an analog control device has been described, but similar effects can be achieved with a digital control device or a relay logic device in a wire logic device.

〔Effect of the invention〕

As explained above, the present invention includes a display control device that arithmetic processes data used for plant monitoring and control and displays the processed results on a display device together with a state diagram of the plant control device prepared in advance. , it becomes possible to grasp the internal state of the control device within the entire plant control device.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a diagram showing a display example of a display device according to the present invention, and FIG. 3 is a block diagram of a conventional plant control device. DESCRIPTION OF SYMBOLS 1... Control device, 2... Signal line, 3... Trend Ben recorder, 4... Indicator, IA... Display control device, IB... Display device. Agent Masuo Oiwa (and 2 others) Figure 1 Figure 2

Claims (1)

[Claims] A plant control device that monitors and controls various plants and outputs the status of this monitoring and control to an output device or displays it on a display device, which calculates data used for monitoring and controlling the plants. A plant control device comprising: a display control device for processing and displaying the processed results on the display device together with a state diagram of the plant control device prepared in advance.