JPH07287614A - Plant monitoring control system - Google Patents

Abstract

PURPOSE:To prevent the operation from becoming impossible caused by the increase in cost and system down due to the lowering of processing speed by the communication of a bus and the piling of hardwares. CONSTITUTION:The information collection processing part 55 of a monitoring device 30 performs the input/output with a sequence controller 10 by a sequence controller interface means 55a and the input/output with a single loop controller 20 by a single loop controller interface means 55b, and performs a collection processing of information to be displayed on a CRT 70 and information to be printed and outputted by a slip printer 80 and an annoucement printer 90. Because an information collection part and an information processing part are not separately provided in a conventional way, the operation impossible due to the lowering of processing speed by the communication of a bus, the increase in cost and system down can be prevented. Therefore, the operation state of a plant can be exactly monitored and operated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plant monitoring control system for monitoring and controlling a small-scale plant having a relatively small number of input / output points.

[0002]

2. Description of the Related Art FIG. 6 is a block diagram showing a configuration of a plant monitoring control system as shown in, for example, "Mitsubishi General Instrumentation Control System MACTUS 300 Series Small Scale Monitoring System Catalog issued by Mitsubishi Electric, November 1990". is there. In FIG. 6, 10 is a sequence controller that inputs plant information indicating the operating state of the plant 1 and controls the plant 1 in sequence, and 20 is a single loop controller that inputs the plant information and controls the plant 1 for instrumentation. 30 is a calculation result from the sequence controller 10 and the single loop controller 2
It is a monitoring device that inputs the calculation result from 0 through the control bus 40 and displays the operating state of the plant 1 and operation information for the plant 1 on the display means or prints out by the printing means. A control bus 40 connects the process controller such as the sequence controller 10 and the single loop controller 20 to the monitoring device 30.
The monitoring device 30 inputs / outputs information to / from the control bus 40 and collects plant information about the plant 1.
0, the collected plant information data is processed and displayed on the CRT 70 as the display means, printed on the form printer 80 or the announcement printer 90 as the print means, and the auxiliary storage device 1
And an information processing unit 60 for accumulating data in 20. Further, there are a keyboard 100 and a mouse 110 as input devices, and control commands from these input devices to the information processing unit 60 are performed.

Next, the operation will be described. Sequence controller 10 and single loop controller 20
Inputs a digital input signal, an analog input signal, and a pulse input signal included in the plant information input from the plant 1 as measurement signals, the sequence controller 10 performs arithmetic processing for sequence control, and the single loop controller 20 performs instrumentation control. The processing result is converted into a digital signal, an analog signal, and a pulse signal, which are output as appropriate. The information collecting unit 50 of the monitoring device 30 inputs the measurement data and the state data included in the plant information from the sequence controller 10 and the single loop controller 20 via the control bus 40. Data is input via the serial bus 2 and processed to display graphics and messages on the CRT 70, and the form printer 8
The form is printed at 0, an alarm message is output to the announcement printer 90, and past data such as form data and alarm message data is stored in the auxiliary storage device 120. In addition, the control setting data and device operation data input by the keyboard 100 and the mouse 110 are transferred to the sequence controller 10 and the single loop controller 20.
Output to. Thereby, the sequence controller 10
Controls the plant 1 in sequence, and the single-loop controller 20 controls the plant 1 for instrumentation.

[0004]

Conventionally, there is an idea that a general-purpose product is used to construct a low-cost system in a plant monitoring control system, and the information processing unit 60 is constructed by a personal computer or a workstation, and a sequence controller is used. Thus, the information collecting unit 50 is configured, and the hardware configuration of the monitoring device 30 is roughly divided into two units. Therefore, in the conventional plant monitoring control system, since the monitoring device 30 is divided into two units as described above, a decrease in processing speed due to bus communication between the information collecting unit 50 and the information processing unit 60, and an information collecting unit. The cost of the hardware of the information processing unit 60 and the cost of the information processing unit 60 are increased, and the system is down in either the information collecting unit 50 or the information processing unit 60.
However, there was a problem such as being unable to operate as.

The present invention has been made in order to solve the above problems, and suppresses a decrease in processing speed due to bus communication between an information collecting unit and an information processing unit, and also reduces hardware costs. It is an object of the present invention to obtain a plant monitoring control system capable of suppressing an increase in cost due to the accumulation of the above, and preventing the operation of the monitoring device from becoming inoperable due to the system down of either the information collecting unit or the information processing unit.

[0006]

A plant supervisory control system according to a first aspect of the present invention comprises sequence controller interface means for performing input / output with a sequence controller and single loop controller interface means for performing input / output with a single loop controller. The monitoring device includes an information collection processing unit that performs input / output with the sequence controller and the single loop controller via the control bus and collects information to be displayed on the display unit and information to be printed out by the printing unit. It is characterized by being provided in.

The plant monitoring and control system according to the second aspect of the present invention is connected to a personal computer, a workstation or the like as a means for extracting past data such as form data and alarm message data obtained from the operating state of the plant and operation information to the outside. The information collecting processing unit is provided with the past data interface means.

A plant monitoring control system according to a third aspect of the present invention is a portable auxiliary storage such as a flexible disk as a means for extracting past data such as form data and alarm message data obtained from the operating state of the plant and operation information to the outside. It is characterized in that the past data interface means connected to the apparatus is provided in the information collection processing section.

A plant monitoring control system according to a fourth aspect of the present invention is characterized in that a controller abnormality detecting means for detecting an abnormality such as a sequence controller or the single loop controller is provided in the information collecting processing section.

A plant monitoring control system according to a fifth aspect of the present invention is characterized in that an information collection processing section is provided with a peripheral device abnormality detecting means for detecting an abnormality in each peripheral device included in the monitoring device.

[0011]

According to the plant monitoring control system of the first aspect of the present invention, the information collecting processing section of the monitoring device includes a sequence controller and a single loop controller via the control bus by the sequence controller interface means and the single loop controller interface means. And the information to be displayed on the display means and the information to be printed out by the printing means are collected and processed.

According to the plant monitoring control system of the second aspect of the present invention, the information collection processing unit is connected to the personal computer, the workstation or the like by the past data interface means, and the form data obtained from the operating state and operation information of the plant. And past message data such as alarm message data is sent to the personal computer, workstation, or the like.

According to the plant monitoring control system of the third aspect of the present invention, the information collection processing unit is connected to the portable auxiliary storage device such as a flexible disk by the past data interface means, and is obtained from the operating status and operation information of the plant. The past data such as the form data and the alarm message data that are stored are sent to the portable auxiliary storage device.

According to the plant monitoring control system of the fourth aspect of the present invention, the information collecting processing section detects the abnormality of the sequence controller and the single loop controller by the controller abnormality detecting means.

According to the plant monitoring control system of the fifth aspect of the present invention, the information collecting processing section detects the abnormality of each peripheral device included in the monitoring device by the peripheral device abnormality detecting means.

[0016]

【Example】

Example 1 (corresponding to claim 1). Hereinafter, Example 1 of the present invention
Will be described with reference to the drawings. First Embodiment FIG. 1 is a block diagram showing the configuration of a plant monitoring control system according to a first embodiment of the present invention. In FIG. 1, 10 is a sequence controller that inputs plant information indicating the operating state of the plant 1 to control the plant 1 in sequence, and 20 is a single loop controller that inputs the plant signal and controls the plant 1 for instrumentation. 30 is a sequence controller 1
Operation result from 0 and single loop controller 20
The monitoring device inputs the calculation result from the control bus 40 and displays the operating state of the plant 1 and operation information for the plant 1 on the display means or prints out by the print means. The control bus 40 includes a sequence controller 10 and a single loop controller 20.
It is a bus that connects the process control device such as the above and the monitoring device 30. The monitoring device 30 has sequence controller interface means 55a for performing input / output with the sequence controller 10 and single loop controller interface means 55b for performing input / output with the single loop controller 20, and performs input / output with the control bus 40. An information collection processing unit 55 for collecting and processing data, a CRT 70 as a display unit for displaying data after being processed by the information collection processing unit 55, a form printer 80 as a printing unit for printing out the data, and an announcement And an auxiliary storage device 120 for accumulating data. The input device includes a keyboard 100, a mouse 110, and a touch panel 130 provided on the front surface of the screen of the CRT 70, and these input devices issue control commands to the information collection processing unit 55.

Next, the operation will be described. Sequence controller 10 and single loop controller 20
Since the operation of is the same as the conventional one, the description is omitted here. The information collection processing unit 55 of the monitoring device 30 includes the sequence controller 10 and the single loop controller 2
0 to obtain and process measurement data and status data of the plant 1 via the control bus 40, and display them graphically or messages on the CRT 70, or the form printer 80.
The form is printed on, the alarm message is output to the announcement printer 90, and past data such as form data and alarm message data is stored in the auxiliary storage device 120.
Further, the information collection processing unit 55 outputs the control setting data and the device operation data input by the keyboard 100 and the mouse 110 or the touch panel 130 to the sequence controller 10 and the single loop controller 20.

As described above, in the first embodiment, the information collection processing unit is integrated as hardware, so that the processing speed is reduced by the serial bus connecting the information collection unit and the information processing unit as in the prior art, There is an effect that it is possible to avoid cost increase due to stacking of different hardware such as the collection unit and the information processing unit, and stop of operation as a monitoring device due to system down of either the information collection unit or the information processing unit.

Embodiment 2 (corresponding to claim 2). In the first embodiment described above, the operation state of the plant can be monitored and operated only by the monitoring device 30 directly connected to the control bus 40. However, in the second embodiment, as shown in FIG.
The information collection processing unit 55 includes personal computers 4 and 5,
By providing the information bus interface means (past data interface means) 55c which is connected to the workstation 6 or the like via the information bus 3, not only the past data such as the form data and the alarm message are accumulated but also
It can be used for maintenance by taking it out and analyzing it.

Embodiment 3 (corresponding to claim 3). In the second embodiment, communication by the information bus is used as a means for extracting the past data such as the form data of the monitoring device 30 and the alarm message to the outside. However, if it is difficult to construct the information bus, As a third embodiment, a method using a portable auxiliary storage device such as a flexible disk 7 as shown in FIG. 3 makes it possible to carry it to any place.

The information collection processing section 55 of the third embodiment includes a sequence controller interface means 55a and a single loop controller interface means 55b.
Besides, FD interface means 55 as past data interface means for connecting with the flexible disk 7
d is provided. This FD interface means 55
Due to d, it is possible to store the past data such as the form data and the alarm message obtained from the operating state of the plant 1 and the operation information in the flexible disk 7. Therefore, if the flexible disk 7 is taken to the installation location of the personal computer 4, 5 or the workstation 6 and set in the personal computer 4, 5 or the workstation 6, the past data can be analyzed. On the contrary, by using the flexible disk 7, the personal computers 4, 5 and the workstation 6 can be installed in a place where it is difficult to lay an information bus,
It becomes possible to analyze past data at that location.

Embodiment 4 (corresponding to claim 4). Example 1 above
In the monitoring device 30 described in 3 to 4, only the state monitoring of the plant 1 is described, but as shown in FIG.
In the information collection processing section 55 of the monitoring device 30 in FIG. 1, the controller abnormality detection means 55e is provided, and the controller abnormality detection means 55e performs abnormality detection of the process controller such as the sequence controller 10 and the single loop controller 20. Sequence controller 10 in a fixed cycle or according to a request from an operator
The connection with the single loop controller 20 or the like is checked, and the result is displayed on the CRT 70 and printed on the announcement printer 90. As shown in FIG. 4, the display screen on the CRT 70 has a major failure 8a, a minor failure 8b, and a normal 8 of the lower process control devices such as the sequence controller 10 and the single loop controller 20.
It has a system monitor screen 8 for displaying c for each process control device unit and an alarm screen 9 for recording an abnormality as a message. The print content by the announcement printer 90 is, for example, the announcement print content 91.

Controller abnormality detecting means 5 as described above
5e, the display screen of the CRT 70, the print contents by the announcement printer 90, and the like, the abnormality of each connected device to the control bus 40 and the control bus 40 can be detected quickly, and the operator can take prompt action.

Embodiment 5 (corresponding to claim 5). Example 4 above
In the above, the abnormality detection of the subordinate process control devices such as the sequence controller 10 and the single loop controller 20 has been described, but in the fifth embodiment, the information collection processing unit 55 includes the peripheral device abnormality detection means 55f as shown in FIG. The peripheral device abnormality detection means 55f detects abnormalities of peripheral devices such as the form printer 80 and the announcement printer 90 that the monitoring device 30 itself has. For example, the peripheral device abnormality detection means 55f detects the abnormality of each peripheral device in a fixed cycle or according to a request from an operator. The connection is checked and the result is displayed on the CRT 70 and printed by the announcement printer 90. As a display screen on the CRT 70, as shown in FIG. 5, the monitoring device 30 itself displays a failure 11a of the peripheral device in units of each peripheral device and a local monitor screen 11 for displaying a normal 11b.
And an alarm screen 12 that records the abnormality as a message
Have and. The print content by the announcement printer 90 is, for example, the announcement print content 13.

Peripheral device abnormality detecting means 55 as described above.
f, the display screen of the CRT 70, the print content of the announcement printer 90, and the like enable quick detection of abnormalities in the peripheral devices connected to the monitoring device 30 itself, which has the effect of enabling the operator to take quick action.

[0026]

As described above, according to the first aspect of the present invention, the sequence controller interface means for inputting / outputting with the sequence controller and the single loop controller interface means for inputting / outputting with the single loop controller are provided for controlling. Since the monitoring device is provided with an information collection processing unit that performs input / output with the sequence controller and the single loop controller via a bus and collects information to be displayed on the display unit and information to be printed out to the printing unit. , The conventional information collecting unit and the information processing unit can be integrated in hardware, the reduction of the processing speed due to the communication between the information collecting unit and the information processing unit can be suppressed, and the cost of the hardware is accumulated. The cost increase due to Deactivation of the monitoring device according to the system-down of one of hardware and processing section can be avoided, the effect is obtained that the operating condition of the plant can be operated by monitoring accurately.

According to the second aspect of the present invention, a past data interface connected to a personal computer, a workstation or the like is provided as means for extracting past data such as form data and alarm message data obtained from the operating state of the plant and operation information to the outside. Since the means is provided in the information collection processing unit, it is possible to obtain an effect that it is possible to take out past data such as form data and alarm messages for analysis and maintenance.

According to the third aspect of the invention, the portable data storage device such as a flexible disk is connected as a means for extracting past data such as form data and alarm message data obtained from the operating state and operation information of the plant to the outside. Since the past data interface means is provided in the information collection processing unit, the past data can be stored in a portable auxiliary storage device such as a flexible disk, which makes it possible to store the portable auxiliary storage in an arbitrary place where it is difficult to construct an information bus. The device can be carried around, and by setting the portable auxiliary storage device in a personal computer or the like, it is possible to analyze past data at any place.

According to the fourth aspect of the invention, since the controller abnormality detecting means for detecting abnormality of the sequence controller, the single loop controller, etc. is provided in the information collecting processing section, the controller for detecting abnormality of the sequence controller, the single loop controller, etc. The output of the abnormality detection means enables the contents of the abnormality to be displayed or printed, and the abnormality of the sequence controller, the single loop controller, etc. can be known quickly and the operator's response can be accelerated. The effect is obtained.

According to the fifth aspect of the present invention, since the peripheral device abnormality detecting means for detecting abnormality of each peripheral device included in the monitoring device is provided in the information collecting processing section, the peripheral device abnormality detecting the abnormality of each peripheral device. With the output of the detection means, it is possible to display or print the details of the abnormality, and it is possible to obtain an effect that the abnormality of the peripheral device can be known quickly and the operator can take prompt action.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a plant monitoring control system according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a plant monitoring control system according to a second embodiment of the present invention.

FIG. 3 is a block diagram showing a configuration of a plant monitoring control system according to a third embodiment of the present invention.

FIG. 4 is a block diagram showing a configuration of a plant monitoring control system according to a fourth embodiment of the present invention.

FIG. 5 is a block diagram showing a configuration of a plant monitoring control system according to a fifth embodiment of the present invention.

FIG. 6 is a block diagram showing a configuration of a conventional plant monitoring control system.

[Explanation of symbols]

1 plant, 2 serial buses, 3 information buses, 4,
5 personal computer, 6 workstation, 7 flexible disk, 8 system monitor screen, 8a major failure, 8b minor failure, 8c normal, 9 alarm screen, 10 sequence controller, 11 own station monitor screen, 11a failure, 11b normal, 12 alarm Screen, 13 announcement print content, 20
Single loop controller, 30 monitoring device, 40
Control bus, 50 information collecting unit, 55 information collecting processing unit, 55a sequence controller interface means, 55b single loop controller interface means, 55c information bus interface means (past data interface means), 55d FD interface means (past data interface means) , 55e Controller abnormality detecting means, 55f Peripheral equipment abnormality detecting means, 60 Information processing unit, 70 CRT, 80 Form printer, 90 Announcement printer, 91 Announcement print content, 100 Keyboard, 110 Mouse, 120 Auxiliary storage device, 130 Touch panel .

Claims (5)

[Claims] 1. A sequence controller for sequence-controlling the plant by inputting plant information indicating a plant operating state, and a single-loop controller for inputting the plant information and instrumentation-controlling the plant,
The operation result from the sequence controller and the operation result from the single loop controller are input via the control bus to display the operating state of the plant and operation information for the plant on the display means or print out by the print means. In a plant supervisory control system including a monitoring device for controlling the sequencer, the system has a sequence controller interface means for performing input / output with the sequence controller and a single loop controller interface means for performing input / output with the single loop controller. Information for performing input / output with the sequence controller and the single loop controller via a bus and collecting and processing information to be displayed on the display means and information to be printed out by the print means. Plant monitoring and control system of the collection processing unit, characterized in that provided in the monitoring device. 2. The past data interface means connected to a personal computer, a workstation or the like is used as a means for extracting past data such as form data and alarm message data obtained from the operation status and operation information of the plant to the outside. The plant monitoring control system according to claim 1, wherein the plant monitoring control system is provided in the processing unit. 3. A past data interface means for connecting to a portable auxiliary storage device such as a flexible disk as means for extracting past data such as form data and alarm message data obtained from the operating state and operation information of the plant to the outside. The plant monitoring control system according to claim 1, wherein the plant monitoring control system is provided in the information collecting processing unit. 4. The plant supervisory control system according to claim 1, wherein controller abnormality detection means for detecting abnormality of the sequence controller, the single loop controller, or the like is provided in the information collection processing unit. 5. The plant monitoring control system according to claim 1, wherein the information collecting processing section is provided with a peripheral device abnormality detecting means for detecting abnormality of each peripheral device included in the monitoring device.