JPH09237115A - Monitor and control equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely display an alarm by reading out a text which is not received by a human interface yet from a process controller out of alarm texts transmit ted from a process controller to a LAN. SOLUTION: At the time of detecting plant abnormality, a CPU 25 stores alarm texts prepared based upon monitoring information in a text storing memory 21 in each sequence number, broadcasts the alarm text to the LAN 4 through a LAN control part 26, stores the alarm texts in a sequence number storing memory 23 and outputs the alarm texts also to an internal bus 16 through a LAN control part 11 in the human interface 5a. A CPU 12 operating according to the control program of a memory 14 displays the alarm information based on the alarm text. An alarm text which is not received by the interface 5a yet out of the transmitted alarm texts is detected by its sequence number and read out from the process controller 3a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a supervisory control device for supervisory control of a plant.

[0002]

2. Description of the Related Art A plurality of process controllers for monitoring a plant and the like and a human interface are connected via a LAN, and information such as plant alarms is notified from the process controller to the human interface via the LAN. In a monitor control device for displaying alarm information and issuing an alarm, the monitor control is conventionally performed by the following two methods.

First, in the first method, in order to reduce the load of the process controller during communication, the process controller does not confirm the response from the human interface as the communication destination, and the process controller sends the alarm text or the like to a plurality of human interfaces. On the other hand, it is a method of continuously transmitting.

In the second method, after the process controller issues the alarm text, it checks whether or not the communication can be normally performed based on the response from each human interface, and if it is determined to be abnormal, This is a method in which the alarm text is reissued, and when it is determined to be normal, the alarm text is issued to the next human interface.

[0005]

However, according to the above-mentioned first method, the information such as the alarm text issued by the process controller may disappear due to collision on the LAN. .

Therefore, this alarm information is not transmitted to the operator who monitors the plant by the human interface. For this reason, there is a problem in that the alarm information cannot be swiftly dealt with and a serious abnormality may occur in the plant.

Further, according to the second method, unlike the above-mentioned first method, the alarm information hardly disappears, but since the communication is performed while confirming the response of each human interface, the communication is performed. Sometimes, the load of the process controller increases, and when multiple human interfaces exist, the issuance of an alarm may be delayed. As with the first method described above, a quick response to the alarm information is performed. There was a problem that I could not.

Further, the second method has a problem in that the load of the process controller during communication increases, which also affects the process control which is the original work of the process controller.

That is, in process control, it is desired to perform high-speed control, but an increase in the load of the process controller during communication causes a delay in process control, and as a result, depending on the type of plant, it is serious. There was a problem that it could cause a serious accident.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a supervisory control device capable of receiving alarm texts from a process controller without omission and reliably displaying alarms. To do.

[0011]

Therefore, first, in order to achieve the above object, the invention according to claim 1 is to provide at least one human interface from at least one process controller for monitoring and controlling a plant via a LAN. Of the alarm text transmitted from the process controller to the LAN in the supervisory control device that transmits an alarm text to the LAN and displays an alarm on the human interface based on the alarm text. Reading means for reading the alarm text of the above from the process controller is added.

Further, the invention according to claim 2 transmits an alarm text to at least one human interface from at least one process controller for monitoring and controlling a plant via a LAN, and based on the alarm text. In the supervisory control device for displaying an alarm on the human interface, the process controller includes a text number adding means for adding a text number to the alarm text, and an alarm text having a text number added by the text number adding means. Is transmitted to the LAN, and alarm text storage means for storing the alarm text transmitted to the LAN by the transmitting means is provided, and the human interface is configured by the transmitting means. Of the Shin alarm text,
First text number storage means for storing the text number of the received alarm text, and the text number of the received alarm text among the alarm texts sent by the sending means and the first text number storage means. The first judging means for judging whether or not the unreceived alarm text exists on the basis of the text number of the alarm text, and the undecided text exists by the first judging means. In this case, a first reading means for reading an unreceived alarm text among the alarm texts stored in the alarm text storage means is provided.

Further, the invention according to claim 3 is based on claim 2.
In the supervisory control apparatus described above, the method of transmitting the alarm text to the LAN by the transmitting means is performed by broadcast communication.

Further, in the invention according to claim 4, in the monitor control device according to claim 2 or 3, the process controller stores a text number of an alarm text transmitted to the LAN by the transmitting means. A second text number storage means is added, and the human interface is based on the text number stored in the first text number storage means and the text number stored in the second text number storage means. , Second to determine whether there is an unreceived alarm text
Of the alarm text stored in the alarm text storage means when the undetermined text is present by the second decision means and the second decision means. It is characterized in that a reading means is added.

Next, the operation of the invention according to each claim will be described. According to the first aspect of the present invention, the alarm text that has not been received at the human interface among the alarm texts transmitted from the process controller to the LAN by the reading means is read from the process controller. The display can be reliably performed.

According to a second aspect of the invention, the text number is added to the alarm text by the text number adding means of the process controller, and the alarm text to which the text number is added by the transmitting means is added to the LAN by the text number adding means. And the alarm text to be transmitted to the LAN by the transmitting means is stored in the alarm text storing means.

Next, by the first judging means in the human interface, among the alarm texts sent by the sending means, the text number of the received alarm text and the text of the alarm text stored in the first text number storage means. Based on the number, it is determined whether there is an unreceived alarm text.

Then, when the first reading means of the human interface determines that the unreceived text exists by the first determining means, among the alarm texts stored in the alarm text storing means,
Since the unreceived alarm text is read, it is possible to receive the alarm text without omission and to reliably display the alarm.

According to a third aspect of the present invention, in the supervisory control device according to the second aspect, the method of transmitting the alarm text to the LAN by the transmitting means is broadcast communication.
The load on the process controller can be reduced, so that the alarm text can be quickly sent to the LAN.

According to a fourth aspect of the present invention, in the supervisory control device according to the second or third aspect, the text number of the alarm text transmitted to the LAN by the transmission means by the second text number storage means in the process controller. Memorize

Next, based on the text number stored in the first text number storage means and the text number stored in the second text number storage means by the second determination means in the human interface, Determine whether there is an unreceived alarm text.

When the second reading means determines that the unreceived text exists, the unreceived alarm text among the alarm texts stored in the alarm text storage means is read, so that the long-term alarm is read. You can automatically load unreceived alarm text even if the text is not sent from the process controller.

[0023]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing an overall configuration of a supervisory control device according to an embodiment of the present invention.

As shown in FIG.
Process controller 2a, I / O via O bus 2a
A process controller 3b is provided via the bus 2b.

These process controllers 3a, 3b
Is for monitoring and controlling the plant 1, and is a LAN
4 is connected. Further, the LAN 4 has human interfaces 5a and 5b typified by a computer for notifying an operator of an alarm.
Is connected.

FIG. 2 shows a human interface 5a.
3 is a diagram showing a configuration of a process controller 3a. FIG.
The same parts as those in FIG. 1 will be described with the same reference numerals. In addition, here, the human interface 5a
Although only the configurations of the process controller 3a and the process controller 3a are shown, similar configurations are adopted for the human interface 5b and the process controller 3b.

As shown in FIG. 1, the human interface 5a includes a LAN control unit 11, a CPU 12, a sequence number storage memory 13, and a control program memory 1.
4, the display 15 is provided, and these are the internal bus 16
It is connected to the.

The process controller 3a includes a text storage memory 21 and an I / O control interface unit 2.
2, a sequence number storage memory 23, a process control program memory 24, a CPU 25, and a LAN control unit 26, which are connected to an internal bus 27.

The components of the human interface 5a will be described below. The LAN control unit 11 controls transmission between the human interface 5a and the LAN 4, and is controlled by the process controller.
The internal bus 16 receives the alarm text transmitted to the AN4 and the sequence number attached to the alarm text.
Output to

Further, the LAN control unit 11 outputs the alarm text read command output from the CPU 12 to the internal bus 16 to the process controller which is the target of the alarm text read via the LAN 4.

The CPU 12 displays alarm information on the display 15 according to the program stored in the control program memory 14 based on the alarm text output to the internal bus 16 via the LAN controller 11.
Call attention to the operator.

Further, the CPU 12 follows the internal bus 1 according to the program stored in the control program memory 14.
6, through the LAN control unit 11, LAN4, the read instruction of the unreceived alarm text is output to the target process controller.

The sequence number storage memory 13 is a LAN
The sequence number added to the alarm text received by the control unit 11 is stored. Control program memory 1
Reference numeral 4 stores a program for controlling the human interface 5a.

The display 15 has an L-level display in accordance with a program stored in the control program memory 14 by the CPU 12.
The alarm information created based on the alarm text received by the AN control unit 11 is displayed.

Next, each component of the process controller 3a will be described. The text storage memory 21, as shown in FIG.
The alarm text corresponding to the plant abnormality output to the human interface via the LAN 4 is stored for each sequence number.

The I / O control interface section 22 is
The monitoring information of the plant 1 input from the I / O bus 2 a is output to the internal bus 27 via the / O device 28. The sequence number storage memory 23 stores the sequence number added corresponding to the alarm text created by the CPU 25 based on the monitoring information of the plant 1 output from the I / O control interface unit 22 to the internal bus 27. .

The process control program memory 24 stores a process control program for controlling the process of the process controller 3a. The CPU 25 creates an alarm text based on the monitoring information of the plant 1 output from the I / O control interface unit 22 to the internal bus 27 according to the process control program stored in the process control program memory 24, and saves the text. It is stored in the memory 21.

Further, the CPU 25 stores the alarm text in the text storage memory 21, adds a sequence number, and the LAN 4 via the LAN control unit 26.
And the sequence number is stored in the sequence number storage memory 23.

Further, the CPU 25, from the human interface via the LAN 4 and the LAN control unit 26,
When a command for reading an unreceived alarm text is output to the internal bus 27, the unreceived alarm text stored in the text storage memory 21 is read out, a corresponding sequence number is added, and then the LAN control unit 26. Broadcast transmission to the LAN 4 via the.

The LAN control unit 26 controls electric transmission between the process controller 3a and the LAN 4. Next, the operation between the process controller 3a and the human interface 5a of the supervisory control device configured as described above will be described.

Normally, the process control program memory 24
C according to the process control program stored in
The PU 25 uses the I / O control interface 22 and the I / O.
Control data is exchanged with the plant 1 via the device 28 to control the plant 1.

Further, the CPU 25 monitors the plant in parallel with the normal control operation based on the monitoring information collected from the plant via the I / O device 28 and the I / O control interface unit 22. There is.

When a plant abnormality is detected from this monitoring information, the CPU 25 creates an alarm text based on this monitoring information and stores the alarm text in the text storage memory 21 for each sequence number.

Further, the CPU 25 adds a sequence number to the created alarm text, broadcasts the alarm text with the added sequence number to the LAN 4 via the LAN control unit 26, and
The sequence number is stored in the sequence number storage memory 23.

The sequence number added to this alarm text is managed by the CPU 25. LA
The alarm text added with the sequence number broadcasted to N4 is L of the human interface 5a.
It is output to the internal bus 16 via the AN control unit 11.

The CPU 12 operating according to the control program stored in the control program memory 14
Thus, the alarm information is displayed on the display 15 based on the alarm text output to the internal bus 16 to which the sequence number is added, and the operator is alerted.

At this time, the CPU 12 compares the sequence number added to the alarm text with the sequence number stored in the sequence number storage memory 13, and compares the latest sequence number stored in the sequence number storage memory 13. If the sequence number added to the received alarm text by “1” is updated from the sequence number of “1”, it is determined that the alarm text has not disappeared, and the sequence number in the sequence number storage memory 13 is set to “ Update only 1 ”.

On the other hand, the sequence number added to the alarm text is compared with the sequence number stored in the sequence number storage memory 13, and the latest sequence number stored in the sequence number storage memory 13 is received. When the sequence number added to the generated alarm text is not updated by “1”, the unreceived alarm text is read from the process controller that transmitted the alarm text.

Specifically, the CPU 12 outputs a command for reading an unreceived alarm text to the process controller that has transmitted the alarm text via the LAN control unit 11, LAN 4, and LAN control unit 26.

C of this human interface 5a
The alarm text read command output from the PU 12 includes information indicating the sequence number of the unreceived alarm text.

The sequence number of the unreceived alarm text included in the unreceived alarm text read command is, for example, the sequence number "N" stored in the sequence number storage memory 13, and the LAN control unit 11 If the sequence number of the alarm text received at is “N + 2”, the sequence number of “N + 1” is included.

Here, the process controller 3a is
Assuming that the alarm text is transmitted, the CPU 25 of the process controller 3a decodes the sequence number of the unreceived alarm text in the unread alarm text read command from the CPU 12 of the human interface 5a.

Then, the CPU 25 reads out the alarm text to which the decoded sequence number is added from the text storage memory 21 and performs the broadcast transmission on the LAN 4 via the LAN control unit 26.

Then, the unreceived alarm text which is broadcast to the LAN 4 is received by the LAN controller 11 of the human interface 5a, and then the CPU 1
2, the alarm information corresponding to this alarm text is displayed on the display 15 to alert the operator.

Depending on the type of plant, the process controller may not notify the human interface of the alarm text for a long period of time. In such a plant supervisory control device, the latest sequence number stored in the sequence number storage memory in the process controller is periodically read from the CPU 12 of the human interface.

Then, the latest sequence number stored in its own sequence number storage memory 13 is compared with the latest sequence number stored in the sequence number storage memory of the process controller.

When they do not match, the unreceived alarm text is read from the text storage memory of the process controller from the CPU of the human interface as described above.

In this case, for example, the latest sequence number stored in the sequence number storage memory 13 of the human interface is "N", and it is stored in the sequence number storage memory 23 in the process controller that transmitted the alarm text. If the latest sequence number is "N + 1", the alarm text corresponding to the sequence number "N + 1" is read.

Therefore, according to the supervisory control device of this embodiment, even when the alarm texts are simultaneously transmitted from the plurality of process controllers to the LAN 4 and the alarm texts disappear, the human interface itself does not operate. Since the unreceived text is read from the process controller, the alarm can be surely urged to the operator.

Further, since the alarm notification from the process controller is surely transmitted to the human interface, it is possible to take prompt action when an alarm occurs and improve the reliability of the supervisory control system.

Further, since the alarm text from the process controller is transmitted to the LAN 4 by broadcasting, the load on the process controller can be reduced, and as a result, the alarm text can be transmitted to the LAN 4 quickly.

Further, even when the alarm text is not transmitted from the process controller for a long period of time, the human interface automatically reads the unreceived alarm text from the process controller, so that the alarm can be surely urged to the operator.

[0063]

As described above in detail, according to the present invention,
It is possible to receive alarm texts from the process controller without omission and to reliably display alarms.

[Brief description of drawings]

FIG. 1 is a diagram showing an overall configuration of a supervisory control device according to an embodiment of the present invention.

FIG. 2 is a diagram showing a configuration of a human interface and a process controller of the supervisory control device in the same embodiment.

FIG. 3 is a diagram showing a configuration of a text storage memory of a process controller in the supervisory control device in the same embodiment.

[Explanation of symbols]

 1 ... Plant, 2a, 2b ... I / O bus, 3a, 3b ... Process controller, 4 ... LAN, 5a, 5b ... Human interface, 11 ... LAN control part, 12 ... CPU, 13 ... Sequence number storage memory, 14 ... Control program memory, 15 ... Display, 16 ... Internal bus, 21 ... Text storage memory, 22 ... I / O control interface section, 23 ... Sequence number storage memory, 24 ... Process control program memory, 25 ... CPU, 26 ... LAN control unit, 27 ... internal bus, 28 ... I / O device.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location H04Q 9/00 311 G05B 19/05 D 331 H04L 11/00 310D

Claims (4)

[Claims] 1. An alarm text is transmitted from at least one process controller for monitoring and controlling a plant to at least one human interface via a LAN, and an alarm display is displayed on the human interface based on the alarm text. In the monitoring control device to be performed, a reading means for reading, from the process controller, an alarm text not received in the human interface among alarm texts transmitted from the process controller to the LAN is added. 2. An alarm text is transmitted from at least one process controller for monitoring and controlling a plant to at least one human interface via a LAN, and an alarm display is displayed on the human interface based on the alarm text. In the monitoring control device, the process controller includes a text number adding means for adding a text number to the alarm text, and a sending means for sending the alarm text to which the text number is added by the text number adding means to the LAN. And an alarm text storage means for storing the alarm text transmitted to the LAN by the transmission means, wherein the human interface includes the alarm text transmitted by the transmission means. A first text number storage means for storing the text number of the received alarm text, and a text number of the received alarm text and the first text number for the alarm text transmitted by the transmission means. First judging means for judging whether or not an unreceived alarm text exists based on the text number of the alarm text stored in the means, and the unreceived text exists by the first judging means. If it is determined that the alarm text storage means has a first reading means for reading an unreceived alarm text among the alarm texts stored therein, the supervisory control device. 3. The supervisory control device according to claim 2, wherein a method of transmitting the alarm text to the LAN by the transmitting means is performed by broadcast communication. 4. The process controller is provided with a second text number storage means for storing a text number of an alarm text transmitted to the LAN by the transmission means, and the human interface is provided with the first text number. Second determining means for determining whether or not there is an unreceived alarm text based on the text number stored in the storage means and the text number stored in the second text number storage means, A second reading means for reading the unreceived alarm text among the alarm texts stored in the alarm text storage means when the second judging means judges that there is an unreceived text The monitoring control device according to claim 2 or 3, characterized in that.