JPH06295395A - Alarm supervisory device - Google Patents

Abstract

PURPOSE:To provide an alarm supervisory device in which an alarm buzzer is matched with the alarm display of a CRT for an alarm contact whose state is changed in a time shorter than the input and output cycle of a CRT display device, and responsibility to the alarm contact can be improved. CONSTITUTION:When an abnormality occurs at a plant, alarm contacts 3a-3c are operated, and alarm input signals D1-D3 are outputted. Then, the alarm input signals D1-D3 are inputted to a time restoring element P20, and alarm output signals D10-D30 are outputted. The output restoration of the alarm output signals D10-D30 is delayed so that the alarm contacts can be turned on in a time longer than the input and output cycle of a CRT display device 7. The CRT display device 7 displays the alarm information by the alarm output signals D10-D30, and simultaneously the alarm buzzer is outputted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an alarm monitoring device for displaying and outputting various data in a plant.

[0002]

2. Description of the Related Art Generally, in a power plant, an alarm monitoring device inputs an alarm contact from an alarm monitoring target device in the plant and outputs an alarm buzzer contact output for notifying an observer with a sound when an abnormality occurs. An alarm input processing device for outputting an alarm to a CRT display device by data transmission,
It has a hierarchical system configuration including a CRT display device that receives an alarm output of an alarm input processing device by data transmission and displays an alarm factor on the CRT, and a CRT.
In addition, in general, the CRT is more
The input / output cycle of the display device is long.

An outline of an automatic alarm system alarm display of a conventional alarm monitor will be described below with reference to the drawings.
FIG. 6 is a block diagram of a conventional alarm monitoring device. In the input / output interface 2 of the alarm input processing device 1, alarm contacts 3a to 3c that operate in response to an abnormality factor of each device in the plant when the abnormality occurs in the device. The alarm input signals D1 to D3 are input, and the alarm input signals D1 to D3 are directly output as the alarm output signals D10 to D30. Alarm buzzer output processing point P
10 outputs a one-shot alarm buzzer contact output signal 4 via the input / output interface 2 when these alarm output signals D10 to D30 are turned on. Transmission interface 5
Transmits the alarm output signals D10 to D30 to the CRT display device 7 via the transmission line 6. CRT display device 7
Receives the alarm output signals D10 to D30 from the alarm input processing device 1 and displays an alarm on the CRT 8.

The timing chart of FIG. 7 shows the relationship between the input / output of each device and the alarm contact in the above configuration. First, the operation of the alarm contact will be described. Alarm contact 3a is ON
Then, it is input to the alarm input processing device at the input processing timing, and at the next output processing timing, the alarm output signal D10 turns on and the alarm buzzer contact output signal 4 turns on.
To do. When the input processing timing of the CRT display device 7 comes in this state, the input 21 of the CRT display device 7
Turns on.

Next, the recovery of the alarm contact will be described.
When the alarm contact 3a is turned off from the state of being input to the CRT display device 7, the alarm contact 3a is input to the alarm input processing device 1 at the input processing timing, and the alarm output signal D10 is turned off at the next output processing timing. When the input processing timing of the CRT display device 7 comes in this state, the input 21 of the CRT display device 7 is turned off.

[0006]

In the alarm monitoring device as described above, when the alarm contact is turned on for a shorter period than the input / output synchronization of the CRT display device as shown in the timing chart of FIG. 8, the alarm input processing device is used. Accepts the alarm contact and outputs the alarm buzzer contact, and outputs the alarm output signal to the CRT display device by transmission, but the CRT display device cannot accept the alarm output signal and the alarm buzzer sounds but the alarm display is displayed on the CRT. The phenomenon that is not done occurs. Similarly, the alarm contact is CR
OFF only during shorter than the input / output cycle of T display device
Even if the alarm is not issued, the alarm buzzer sounds but the alarm display of the CRT does not change. Therefore, a phenomenon occurs in which the supervisor cannot know where in the plant the abnormality has occurred.

Therefore, an object of the present invention is to provide an alarm monitoring device in which the alarm buzzer and the alarm display of the CRT are the same for an alarm contact whose state changes within a time shorter than the input / output cycle of the CRT display device, and to realize the software. It is to improve the responsiveness to the alarm contact by reducing the amount of data and increasing the processing speed of the information input processing device.

[0008]

A first aspect of the present invention is to provide an input / output means for reading alarm data of a plant and outputting an alarm signal, an audio output means for reading this alarm signal and outputting audio information, and an alarm signal for a predetermined period. In the display device including the screen display means for displaying the read alarm information on the screen, the output time of the alarm signal is set to be longer than the read cycle of the alarm signal of the screen display means.

A second aspect of the present invention is directed to an alarm contact which is activated when an abnormality occurs in the plant and outputs an alarm signal, an input / output means for reading the alarm signal and continuously outputting it for a set time, and the input / output means. A voice output means for reading a warning signal output from the output means and outputting a voice; and a screen display means for reading a warning signal output from the input / output means and outputting a warning content on a screen. To do.

[0010]

According to the first aspect of the invention, when an abnormality occurs in the plant, the alarm data is read and the alarm signal is output from the input / output means. Then, the input / output means outputs an alarm signal for a time longer than the cycle in which the screen display means reads data.

The voice output means reads the alarm signal and outputs the voice, and the screen display means displays the alarm information on the screen based on the alarm signal. In the second aspect of the invention, when an abnormality occurs in the plant, the alarm contact operates, and an alarm signal is output from this alarm contact and read by the input / output means.

Then, the alarm signal is continuously output from the input / output means to the screen display means for the set time. Then, the audio output means reads the alarm signal and outputs the audio, and the image display means displays the alarm information on the screen based on the alarm signal.

[0013]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of the present invention. The difference between the alarm monitoring device of the present embodiment and the conventional alarm monitoring device of FIG. 6 is that an alarm input processing device 1 is provided with a time delay return element P20. , Alarm output signals D10 to D for the alarm contacts 3a to 3c
The point is that the return of 30 is delayed for a certain period of time.
The same parts as those of the conventional example are designated by the same reference numerals, and the description thereof will be omitted.

Next, the operation of this embodiment will be described. When the alarm contacts 3a to 3c are turned on for shorter than the input / output cycle T1 of the CRT display device 7, the alarm input signals D1 to D3 are also input / output cycle T of the CRT display device 7.
The alarm output signal D10 to D30 is turned on only for shorter than 1.
Is delayed by the timed return element P20, so CR
The T display device 7 is turned on longer than the input / output cycle T1.

The alarm output signals D10 to D30 are transmitted to the CRT display device 7 via the transmission interface 5. The CRT display device 7 outputs this alarm output signal D
Accepts 10 to D30 and displays the alarm factor on CRT8.

When the alarm contacts 3a to 3c are turned off only during the input / output cycle T1 of the CRT display device 7, the alarm input signals D1 to D3 are also turned off only during the input / output cycle T1 of the CRT display device 7. However, the alarm output signals D10 to D30 are delayed in recovery by the time delay recovery element P20, and the alarm input signals D1 to D3 are turned ON again during this time.
As a result, the result alarm output signals D10 to D30 remain ON, and the alarm buzzer output processing element P10 does not output the one-shot alarm buzzer contact output signal 4 and unnecessary notification to the monitoring staff is not made.

The relationship between the input / output of each device and the alarm contacts 3a to 3c in the above configuration is shown in the timing charts of FIGS. 2 and 3. As can be seen from this figure, according to the present embodiment, the alarm contacts are shown. Is turned on for a shorter time than the input / output cycle of the CRT display device 7, the CRT
Since the display device 7 receives the alarm output signals D1 to D3, the alarm buzzer and the alarm display of the CRT 8 match.
Also, when the alarm contact is turned off only for a period shorter than the input / output cycle of the CRT display device 7, the alarm display of the CRT 8 indicates that the alarm is continuing, the alarm buzzer does not sound, and unnecessary notification is not made. In this way, alarm buzzer and CRT8
The alarm displays of can be made to coincide with each other, and the reliability of the alarm monitoring device can be improved. Further, it is possible to receive an alarm signal having a pulse width which cannot be received by the CRT display device 7 in the related art, and the responsiveness to the alarm can also be improved.

FIG. 4 is a block diagram of the second embodiment of the present invention. In the conventional alarm monitoring apparatus of FIG. 6, a recovery detecting element P30 and a delay processing element P40 are added to the alarm input processing apparatus 1. It is a composition. As a result, the return detection element P30 detects the change of the alarm input signal from ON to OFF word by word, and the delay processing element P40 detects the change of the alarm output signal corresponding to the bit of the change of the alarm input signal from ON to OFF. The process of delaying the restoration for a certain period of time is performed for each word.

Next, the operation of the second embodiment will be described. In the input register R1, the above-mentioned alarm input signals D1 to D3 are associated with each bit position in one word.
Similarly, the output register R10 similarly outputs the above-mentioned alarm output signal D10.
~ D30 is associated. Alarm contacts 3a-3c are C
When it is turned on for a time shorter than the input / output cycle T1 of the RT display device 7, the corresponding bit in the input register R1 changes from 0 → 1 → 0 within a time shorter than the input / output cycle T1 of the CRT display device 7. The return detection element P30 detects the change of each bit in the input register R1 from 1 to 0, and the delay processing element P40 detects the change from the input register R1 to 0.
Only the bit changed to is stopped updating the output register R10 for a certain period of time. As a result, the alarm output signals D10 to D30
Is ON longer than the input / output cycle of the CRT display device 7.
To do. The alarm output signals D10 to D30 are transmitted to the CRT display device 7 via the transmission interface 5, and C
The RT display device 7 outputs the alarm output signals D10 to D30.
Is accepted and the alarm factor is displayed on the CRT 8. If the alarm contacts 3a to 3c are turned off only for a period shorter than the input / output cycle T1 of the CRT display device 7, the input register R
The corresponding bit in 1 changes 1 → 0 → 1 within a time shorter than the input / output cycle T1 of the CRT display device 7.
The return detection element P30 is 1 for each bit in the input register R1.
The change from 0 to 0 is detected, and only the bit of the input register R1 changed from 1 to 0 is stopped by the delay processing element P40 for a predetermined time. During this time, the corresponding bit in the input register R1 again changes from 0 to 1 and the corresponding bit in the result output register R10 remains 1. Since the alarm output signals D10 to D30 remain ON, the alarm buzzer output processing element P10 does not output the one-shot alarm buzzer contact output signal 4, and unnecessary notification is not made.

The return detection element P30 and the delay processing element P described above
A flow chart executed by 40 is shown in FIG. It should be noted that P1 to P8 in the figure indicate each step of the flowchart. The calculation of this embodiment is executed once, for example, within the input / output cycle. First, at P2, an alarm contact signal is input and stored in the input register R1. Then, in P3, the previous input value and the current input value are compared bit by bit, and if there is a bit changed from 1 to 0, in P4, the transfer of the contents of the input register R1 to the output register R10 is stopped for a certain period of time. As a result, the bit corresponding to the bit in the input register R1 changed from 1 to 0 in the content of the output register R10 is held at 1 for a certain period of time.

If there is no bit changed from 1 to 0 in P3, it is confirmed in P5 whether the update to the output register R10 is stopped by P4. If not, the contents of the input register R1 are output in the output register R10 in P6. Move to.

At P7, a logical sum operation of the output register R10 and the input register R1 of the above result is performed, and the result is stored in the output register R10 again, so that a new alarm is generated while the update of the output register R10 is stopped by P4. Input register R
Even if the content of 1 has a bit changed from 0 to 1, it can be reflected in the output register R10. Then move to the next program at P8.

According to this embodiment, the amount of software can be significantly reduced, and the processing speed of the alarm input processing device can be increased, so that the responsiveness to the alarm contact can be improved.

[0024]

As described above, according to the present invention, OFF → ON within a time shorter than the input / output cycle of the alarm monitoring device.
Since the alarm buzzer and the alarm display can be matched with the alarm contact whose state changes from OFF to ON or OFF to ON, the reliability can be improved and the responsiveness to the alarm can be improved.

[Brief description of drawings]

FIG. 1 is a configuration diagram of this embodiment.

FIG. 2 is a time chart showing input / output of this embodiment.

FIG. 3 is a time chart showing input / output of this embodiment.

FIG. 4 is a configuration diagram of a second embodiment of the present invention.

FIG. 5 is an explanatory view showing the operation of the second embodiment of the present invention.

FIG. 6 is a configuration diagram of a conventional alarm monitoring device.

FIG. 7 is a diagram showing input / output of a conventional alarm monitoring device.

FIG. 8 is a diagram showing inputs and outputs of a conventional alarm monitoring device.

[Explanation of symbols]

1 ... Alarm input processing device, 2 ... Input / output interface,
3a to 3c ... alarm contact, 4 ... alarm buzzer contact output signal, 5
... Transmission interface, 6 ... Transmission path, 7 ... CRT display device, 8 ... CRT, 21 ... CRT display device input, D1-D3 ... Alarm input signal, D10-D30 ... Alarm output signal, P10 ... Alarm buzzer output processing element , P20 ... timed return element, P30 ... return detection element, P40 ... delay processing element,
R1 ... Input register, R10 ... Output register, T1 ... CR
Input / output cycle of T display device, T2 ... Input / output cycle of alarm input / output device.

Claims (2)

[Claims] Claim: What is claimed is: 1. Input / output means for reading alarm data of a plant and outputting an alarm signal, audio output means for reading the alarm signal and outputting audio information, and a screen for reading the alarm signal at regular intervals and displaying the alarm information on the screen. In a display device comprising a display means, the alarm monitoring device is characterized in that the output time of the alarm signal is set longer than the read cycle of the alarm signal of the screen display means. 2. An alarm contact which is activated when an abnormality occurs in the plant and outputs an alarm signal, an input / output means for reading the alarm signal and continuously outputting it for a set time, and an output from the input / output means. An alarm monitoring apparatus comprising: a voice output unit for reading a warning signal for outputting a warning signal and a screen display unit for reading a warning signal output from the input / output unit and outputting a warning content on a screen.