JPH0744226A - Plant monitoring device - Google Patents

Abstract

PURPOSE:To perform alarm display again to an operator after the lapse of suitable time even when the state of not canceling but continuing any abnormal state is existent. CONSTITUTION:This device is provided with an alarm generation display means 54 for holding the information of abnormal state generation and displaying the generation of the abnormal state on a display device, alarm display changing means 55 for receiving a signal showing confirmation from a pointing device and for changing a display form to report the generation of the abnormal state on the alarm generation display means 54, timer 56 to count time from the time point of abnormal state generation and to be reset after the lapse of prescribed time set in advance and at the time point of canceling the factor of abnormal state generation, and realarm output means 51 for performing the alarm display again on the display device after the lapse of prescribed time set on the timer 56.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plant monitoring apparatus for inputting signals from a process or various electric equipments installed in the process and monitoring the control / operating states thereof. The present invention relates to a plant monitoring device capable of accurately transmitting alarm (alarm) information indicating various abnormal states occurring during operation (operation) monitoring to an operator.

[0002]

2. Description of the Related Art Conventionally, there is a plant monitoring device called a distributed control system for controlling and operating a plant by using a CRT display device. Such a plant monitoring device displays various information necessary for controlling and operating the plant on the CRT screen of the display device, and when an abnormality occurs in the plant, an alarm is displayed to inform the operator. The operator is notified so that the operator can give an appropriate instruction or process for the abnormality.

Further, in the case where an alarm is displayed (while an abnormality is occurring), when an operator confirms the occurrence of an abnormal state, a function is provided for changing the form of the alarm display displayed on the display device. ing. For example, when an abnormal state occurs, a message indicating the abnormal state is displayed on the screen of the CRT display device by flashing,
Alert the operator, the operator confirms it,
For example, when an instruction such as pressing a confirmation key is given, the flashing display is stopped, and a continuous lighting display form is displayed.

[0004]

However, in an apparatus constructed in this way, if an alarm that has occurred once is confirmed and the cause of occurrence of the abnormal condition still persists after the alarm is confirmed, the operator once has an abnormal condition. For example, forgetting to check the state, and overlooking the fact, there is a possibility that a dangerous state may occur in control operation.

Here, the present invention enables a device having a plant monitoring function to display a re-warning display even after the operator confirms the occurrence of an abnormal state and the cause of the abnormal state remains unresolved. An object of the present invention is to provide a plant monitoring device capable of enhancing safety during plant operation and operation.

[0006]

SUMMARY OF THE INVENTION The present invention to achieve such an object is to provide a plant monitoring apparatus for inputting a signal from a process and operating and monitoring the process using a display device and a pointing device. Alarm occurrence display means for receiving the information indicating the occurrence and holding the information and displaying the occurrence of the abnormal state on the display device, and an abnormal state by the alarm generating means for receiving a signal from the pointing device for confirming the occurrence of the abnormal state Alarm display changing means for changing the display form of the occurrence, and reset at the time when a predetermined time set in advance is measured by measuring the time from the time of occurrence of the abnormal condition and when the cause of the abnormal condition is released A timer and a warning display again on the display device when a predetermined time set in the timer has elapsed A warning output section, a plant monitoring apparatus characterized in that a.

[0007]

The plant monitoring device displays the operation monitoring screen on the display device, and performs the plant operation / monitoring operation based on the signal from the operation keyboard or the pointing device. If any abnormality occurs during such operation / monitoring operation, the alarm generation display means displays an alarm display for notifying the operator of the abnormality by a message or the like.

The timer starts at the time of alarm generation and measures time while the alarm factor continues. In addition, a predetermined time is set in advance in this timer, and when the set time is reached, the re-warning output means is activated and restarted. When the re-warning output means is activated when the timer times out,
An alarm is displayed again on the display device to notify the operator that the abnormal condition continues after the confirmation.

[0009]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a configuration block diagram showing an embodiment of the present invention. Here, it is assumed that it is applied to a distributed control system. In the figure, OP is an operation monitoring device (operator station), which is provided with a display device 1 such as a CRT having a man-machine interface function, and a pointing device 2 such as an operation keyboard for operating processes and inputting data and the like. .

FC is a distributed control device (control station). This control device is connected to the operation monitoring device OP via a communication line BS. In this control device, a control means 3 and an abnormality detection means 4, which are called a plurality of internal instruments or unit instruments, are prepared. As a typical internal instrument, signals from various sensors installed in the process are input, PID control calculation is performed on the deviation between these and a predetermined set value, and the control output is sent to the operating end of a valve or the like. There are those that perform a feedback control calculation function for outputting, those that perform a sequence calculation function, etc., and those that function as switches. Each of these internal instruments is identified by a tag name. In addition, each internal instrument has a process data (signal from a sensor, etc.) PV, an operation output MV,
For example, upper and lower set values PH and P for process data
L, etc. are handled, and various kinds of data can be operated and monitored by the display means (display screen) of the operation monitoring device OP via the communication line BS.

Further, the abnormality detecting means 4 has a function of detecting, for example, a case where the value of the process data PV exceeds the range of the upper and lower limit set values PH and PL, and when an abnormality occurs, the fact is detected. Is transmitted to the operation monitoring device OP via the communication line BS. Further, the abnormality detecting means monitors the operating state of each internal instrument itself, the operating environment in the control device FC, and determines whether or not those states exceed a preset alarm set value. Also, when an abnormality occurs in the control device itself, similarly, alarm information indicating that is transmitted to the operation monitoring device OP.

FIG. 2 is a functional block diagram of the operation monitoring device OP side. In the figure, reference numeral 51 denotes a communication interface coupled to the communication line BS, which performs predetermined communication control with a control device connected to the communication line BS. Reference numeral 52 is a data collection means for collecting various data and alarm information handled by the control device FC via the communication line BS and the communication interface 51, and constructing a database for operating / monitoring the process.

Reference numeral 53 denotes a plant operation / monitoring means, which inputs the signals from the process collected by the data collecting means 52 and uses the display device 1 and the pointing device 2 to operate and monitor the process as a whole. Shows. Reference numeral 54 is an alarm occurrence display means, which holds various kinds of abnormality occurrence information sent from the abnormality detection means 4 side and displays the occurrence of these abnormal states on the display device 1 by, for example, a message. As a method of displaying the occurrence of an abnormal state on the display device 1, for example, a method of displaying by flashing in an alarm display field prepared in advance on the screen, or an alarm window is opened to notify the occurrence of the abnormal state. Various methods such as highlighting a message can be adopted.

Reference numeral 55 denotes an alarm display changing means, which receives a signal from the pointing device 2 for confirming the alarm generation,
It has a function of changing the display form indicating the occurrence of an abnormal state by the alarm generation display means 54. For example, a message displayed in flushing mode is changed to a static display. 5
6 is a timer, which measures the time from the time of occurrence of the abnormal state, and is reset at the time when a preset predetermined time (time-up time) has passed and when the cause of the abnormal state is released. It is configured. In addition,
This timer is shown as one block here, but in actuality, a large number are prepared for each monitoring point,
An individual time-up time is set for each monitoring point, and when an abnormal state occurs at each monitoring point, a corresponding timer individually starts time measurement operation.

Reference numeral 57 is a re-warning output means for re-warning the display device 1 when a predetermined time set by the timer 56 has elapsed. The re-warning output means 57 includes, for example, an output mode in which a message that has been displayed in a still state until then is changed to a flushing display again. FIG. 3 is a conceptual diagram of the structure of the database constructed in connection with the abnormal state display.

Da is an abnormality occurrence state storage unit, which is an area in which the current abnormality occurrence state is stored. Here, when an abnormality detection means 4 detects an abnormal situation in a plant or the like (here, n monitoring items are monitored). It is assumed that there is a point), and the corresponding location (tag name) after receiving the detection information.
Bit turns on (or off). The alarm occurrence display means 54 monitors the abnormality occurrence state storage unit Da and displays a message indicating the occurrence of an abnormality for each bit (monitoring point) that is turned on.

Reference numeral Db denotes a previous abnormality occurrence state storage unit, in which the previous abnormality occurrence state at each monitoring point is stored, and when the abnormality occurs, the contents of this storage unit are compared with each other to newly generate the abnormality. It is possible to identify whether it is a real thing, has continued since the last time, or has newly returned. Dc is a flushing occurrence state storage unit which is set at the timing of abnormality occurrence and recovery, and is prepared when the abnormality occurrence display is flushed. The data stored here is, for example, reset by the operation of the confirmation key by the operator, and the alarm display changing means 55 refers to this storage unit to flush or stop the corresponding abnormality occurrence display. Or

Dd is a re-warning state storage unit, and when a re-warning request is output from the timer 56, a corresponding bit is turned on, and the re-warning output means 57 refers to this storage unit to generate a corresponding abnormality. Change the display to the re-warning state,
It also outputs a re-warning message. De is an area that constitutes a timer. A timer is prepared for each monitoring point, and when an abnormal state occurs at the corresponding monitoring point, the time measurement operation of the corresponding timer starts and the timer operates normally. When returning, it is configured to stop the time measuring operation. Further, each timer has a unique time-up time set for each monitoring point, and when the set time elapses, the corresponding bit of the re-warning state storage unit Dd is turned on.

The operation of the apparatus thus constructed will be described below. FIG. 4 is a time chart showing the operation when an abnormal state occurs. In a normal plant monitoring state, a screen for operating / monitoring the plant is displayed on the screen of the display unit 1. As a screen for plant operation / monitoring, an alarm summary screen that shows the abnormal states in the process controlled by the control device FC in the order in which the abnormalities occur, and a trend that shows the change state of the process signal in time series. A graph screen, a control group screen showing internal instruments or unit instruments provided in the control device FC for each of a plurality of groups, and a tuning screen for tuning each instrument provided in the control device are prepared.

The expansion to each of these screens and the operation instruction on the display screen are performed by the operation of various operation keys provided on the pointing device 2 and the operation of a mouse, a touch screen, and the like. The operation according to the operation of is reflected in the control device FC. If any abnormality occurs at the timing shown in FIG. 4A while the screen for plant operation / monitoring is displayed, the alarm generation display means 54 displays the abnormality status in the display screen. The occurrence information is displayed in the flushing state as shown in (b). At the same time, the timer 5 of the corresponding monitoring point
6 is started as shown in (c). In this state, the operator can observe a message indicating the occurrence of an abnormal state in the display screen in the flushing state as shown in (d).

Thereafter, at the time of confirmation shown in (b), when the operator confirms the occurrence of the abnormal state (this confirmation is performed, for example, by operating the confirmation key in the keyboard), the alarm display changing means 55. In response to this confirmation signal, the flashing display changes the message indicating the occurrence of the abnormal state up to the continuous lighting display (still state display) as shown in (d). During this time, the time measuring operation of the timer 56 is continuously performed, and when the time-up time set therein is reached, the time-up signal is transmitted from the timer 56 to the re-warning output means 57.
The message indicating the occurrence of the abnormal state, which has been displayed in the continuous lighting state until then, is changed to the display in the flushing state again as shown in (d).

At the same time, the timer 56 of the corresponding monitoring point is reset and started as shown in (c). In this state, the operator can observe a message indicating the occurrence of an abnormal state in the display screen in the flushing state as shown in (d). When the abnormal state is released (returned), as shown in (c), the timer 56
The time measurement operation of is reset, and as shown in (d), the message indicating the occurrence of the abnormality disappears, and the return message is displayed if necessary.

FIG. 5 is a state transition diagram between the occurrence of an abnormal state and the flashing display state of the abnormal message.
Here, “occurrence” means that an abnormal state has occurred, and “1” is set in the relevant bit of the abnormal state storage unit Da, and “reset” eliminates the cause of the abnormal state and resets it. It means that. The confirmation means resetting the flushing display state by an operator operation.

Once an abnormal state occurs, the state transits to the abnormal state and the flushing ON state, and the message indicating the abnormal state is displayed in flashing. In this state,
By an operator's confirmation operation, the state transits to an abnormality occurrence state or a flushing OFF state. After that, while the abnormality occurrence state is not canceled, a re-warning is given, and the abnormality occurrence state and the flushing ON state are again changed, and thereafter, both states are repeated.

In the above description, it is assumed that the message indicating the occurrence of the abnormal state is displayed in the flushing state and the re-warning state is displayed in the flushing state. May be displayed in red and the re-warning state may be displayed in flashing, so that the two display modes may be different.

[0026]

As described above in detail, according to the present invention, if an abnormal condition occurs, and after confirming the abnormal condition, there is a situation in which the abnormal condition continues without being released, the operator is informed. A re-warning is displayed when an appropriate time has elapsed, and a highly reliable plant monitoring device can be provided.

[Brief description of drawings]

FIG. 1 is a configuration block diagram showing an embodiment of the present invention.

FIG. 2 is a functional block diagram of an operation monitoring device OP side.

FIG. 3 is a conceptual diagram of the configuration of a database constructed in association with abnormal state display.

FIG. 4 is a time chart showing an operation when an abnormal state occurs.

FIG. 5 is a state transition diagram between occurrence of an abnormal state and a flushing display state of a message indicating the occurrence of the abnormal state on the display screen.

[Explanation of symbols]

 OP operation monitoring device (operator station) FC control device (control station) BS communication line 1 display device 2 pointing device 3 control means 4 abnormality detection means 51 communication interface 52 data collection means 53 plant operation monitoring means 54 alarm generation display means 55 alarm Display changing means 56 Timer 57 Re-warning output means

Claims (1)

[Claims] 1. A plant monitoring device for inputting a signal from a process to operate and monitor the process using a display device and a pointing device, receives information indicating occurrence of an abnormal condition and holds the information, and An alarm occurrence display means for displaying the occurrence on the display device; an alarm display changing means for changing a display form of the abnormal condition occurrence by the alarm issuing means upon receiving a signal from the pointing device for confirming the occurrence of the abnormal condition; A timer that is reset at the time when a predetermined time set in advance is measured from the time of occurrence and when the cause of the abnormal state is released, and the predetermined time set in this timer has passed And a re-warning output means for re-warning the display device at that time. Monitoring device.