JP3320216B2 - Plant monitoring equipment - Google Patents

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 properly notifying an operator of information on a plant abnormality or failure in a power plant system or the like.

[0002]

BACKGROUND OF THE INVENTION Once a turbine in a thermal power plant has been shut down, it takes a lot of time and effort to restart it. Therefore, a plurality of shaft units from one axis to n-axis that can operate the turbine alone are installed, and even if one of the shaft units is stopped for periodic inspection or repair, the turbine is controlled by another shaft unit. It can be operated continuously.

FIG. 15 is a schematic diagram of the whole of a monitoring device for such a plant. In this figure, one-axis unit monitoring units U1 to n-axis unit monitoring units Un
It comprises an axis input circuit I through n-axis input circuit In and a one-axis monitoring circuit D1 through n-axis monitoring circuit Dn.

A monitoring panel in the central operating room where the operator is located is provided with a one-axis alarm window W1 to an n-axis alarm window Wn, respectively, based on signals from the one-axis monitoring circuits D1 to n-axis monitoring circuits Dn. Warning lamp is turned on.

FIG. 16 shows a one-axis monitoring circuit D shown in FIG.
1 is a block diagram showing the configuration of No. 1 (the n-axis monitoring circuit Dn has the same configuration).

In FIG. 1, an alarm window W1 includes m alarm lamps L1 to Lm. When receiving the plant input data (hereinafter, sometimes abbreviated as PID) transmitted from the one-axis input circuit I1 at predetermined intervals, the data scanning means 1 writes the data into the plant data table 2 and updates the data at predetermined intervals. Is updated.

FIG. 17 shows contents to be written and updated in the plant data table 2.
As shown in this figure, the name and data value of each PID are described, and each PID is classified so as to belong to any one of the alarm lamps L1 to Lm. The data value of each PID is a plant data value in the case of a signal analog input from the one-axis input circuit I1, and is an on / off status in the case of a digital input.

The present value comparing means 4 of the alarm judging means 3 compares the data value of the PID stored in the plant data table 2 with the alarm limit value stored in the state judging table 5, and performs the comparison. PID status table 6
Write to.

FIG. 18 shows the contents written in the PID status table 6. In this figure, for example,
"One axis ANN-2" indicates the name of the lamp L2, and "B000" and "B00"
Three PIDs “1” and “B002” are assigned. “0” in the column of PID status indicates that the level of the corresponding PID is equal to or lower than the alarm limit value, and “1” indicates that the level of the corresponding PID exceeds the alarm limit value.

The alarm lamp lighting determination means 7 reads the contents of the PID state table 6 and turns on the alarm lamp if at least one of the PIDs belonging to each alarm lamp exceeds the alarm level. Determine that it should be done. Then, when it is determined that it should be turned on, “1” is written in the alarm window state table 8 when it is determined that it should not be turned on, that is, “0” when it is turned off. For example, in FIG.
Since all the PIDs are "0", the lamps are turned off, and the lamps L2 and L3 are lit because at least one PID is "1".

The alarm window control means 9 determines the alarm lamp L of the alarm window W1 based on the contents of the alarm window state table 8.
Lighting and extinguishing are controlled for each of 1 to Lm. Note that solid arrows among the arrows in FIG. 16 do not indicate the flow of signals, but indicate the order of processing.

[0012]

In a plant system having a plurality of shaft units as described above, there are a shaft unit which is stopped for regular inspection and repair and a shaft unit which is normally operated. May be mixed. In such a case, a simulation operation may be performed on the axis unit which should have been stopped for checking the inspection result, etc., and an alarm lamp of the axis unit which should not be turned on by the execution of the simulation operation. May light up.

[0013] Even in an axis unit that is performing a periodic inspection, etc., monitoring of all PIDs is not interrupted, and a certain PID is not stopped.
With regard to, there are cases where monitoring should be continued as it is. That is, the warning lamps L1 to L of the warning window W1
With respect to m, there are cases where both the lighting of which can be ignored by the operator and those which must not be ignored.

However, in the conventional apparatus, a means for allowing the operator to distinguish between an alarm lamp whose lighting can be ignored and an alarm lamp whose lighting should not be ignored as described above is added. First, the operator had to identify these by self-effort, such as writing down the axis units under regular inspection and negligible alarm lamps.

However, the number of alarm lamps provided on the monitor board is considerable, and the operator must be considerably less nervous to make these distinctions. In some cases, unnecessary protection operation or the like may be performed due to confusion of the operator.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a plant monitoring apparatus capable of reducing the labor of an operator performing a plant monitoring operation and improving the reliability of monitoring. And

[0017]

Means for Solving the Problems As means for solving the above-mentioned problems, the invention according to claim 1 comprises an alarm window formed by a plurality of alarm lamps, and a certain plant input data sets a predetermined alarm level. Alarm window control means for causing an alarm lamp assigned to the plant input data to perform a lighting operation when the power is exceeded, in a plant monitoring apparatus including: An alarm window kill switch for determining, the alarm window control means, for each alarm lamp, plant input data assigned to the alarm lamp exceeds a predetermined alarm level, and The lighting operation is permitted only when the contact of the alarm window kill switch corresponding to the alarm lamp is input to the unconstrained side. The one in which the features.

According to a second aspect of the present invention, a plant comprising a plurality of axis units from a first axis to an n-th axis is monitored. The plant is formed by a plurality of alarm lamps and corresponds to each axis unit. And alarm lamps in the alarm window corresponding to the axis unit when a certain plant input data from each of the axis units exceeds a predetermined alarm level. In a plant monitoring apparatus comprising: n alarm window control means for causing a warning lamp assigned to input data to perform a lighting operation, the lighting operation of all the warning lamps in each of the warning windows is uniformly restricted. The alarm window control means has n alarm window kill switches for determining whether or not each alarm lamp is activated. Event input data exceeds a predetermined alarm level, and only when the contact of the alarm window activation switch corresponding to the alarm window control means is input to the unconstrained side, the lighting operation is permitted. It is characterized by the following.

According to a third aspect of the present invention, in the first or second aspect of the present invention, there is provided an alarm lamp whose lighting operation based on the alarm window control means is restricted by the input of the alarm window deactivating switch. And a restraining warning lamp lighting means for lighting the warning lamp in a lighting color different from a normal lighting color.

According to a fourth aspect of the present invention, it is assumed that there is an alarm window formed by a plurality of alarm lamps, and that plant input data belonging to each of the alarm lamps is allocated in advance, and a certain plant input data is assigned. A warning message corresponding to the warning lamp to which the plant input data belongs, the warning message display control means for displaying a warning message corresponding to the warning lamp to which the plant input data belongs. Has an alarm window kill switch for determining whether to restrict the display of the alarm message corresponding to the alarm message display control means, the alarm message display control means, the plant input data assigned to the alarm lamp is a predetermined Exceeding the alarm level,
In addition, the warning message is displayed only when the contact of the alarm window activation / deactivation switch corresponding to the alarm lamp is input to the unconstrained side.

According to a fifth aspect of the present invention, it is assumed that there is an alarm window formed by a plurality of alarm lamps, plant input data belonging to each alarm lamp is assigned in advance, and all the plant input data are assigned to each alarm lamp. A plant data display control means for displaying a message relating to a predetermined item on a display device, wherein the plant monitoring device has an alarm window deactivating switch for deciding whether the display of the message corresponding to the alarm lamp is valid or invalid. The list data message display control means attaches a sign indicating that the message of the plant input data belonging to the alarm lamp in which the alarm window activation / deactivation switch is invalid is invalid, or the message is invalid. It is displayed with a color that indicates that there is It is intended to.

According to a sixth aspect of the present invention, it is assumed that there is an alarm window formed by a plurality of alarm lamps, and plant input data belonging to each alarm lamp is assigned in advance, and a certain plant input data is assigned. A warning message printing control means for printing, by a printing means, an alarm message corresponding to the warning lamp to which the plant input data belongs when the predetermined alarm level exceeds a predetermined warning level. Has an alarm window activation switch for determining whether or not to restrict the printing of the alarm message corresponding to the alarm message, the alarm message print control means, the plant input data assigned to the alarm lamp is a predetermined The contact of the alarm window activation switch corresponding to the alarm lamp that exceeds the alarm level Only if entered the city side, is intended to print a warning message to the printing means, it is characterized in.

[0023]

According to the first aspect of the present invention, if there are devices under periodic inspection or repair, the operator sets these alarms so as not to turn on an alarm lamp assigned to plant input data from these devices. Turn on the contact of the alarm window kill switch corresponding to the lamp.

Thus, even if plant input data exceeding the alarm level is generated due to a periodic inspection work, a repair work, or the like, the alarm lamp is not turned on. Therefore, it is possible to prevent the operator from causing unnecessary confusion and increasing the burden of labor.

According to the second aspect of the present invention, a certain plant is monitored from a plurality of axis units. When the alarm lamp is not turned on similarly to the first aspect of the present invention, the axis unit is used. It is something to do. Usually, in such a plant, the operation or the periodic inspection is performed in units of axis units, so that it is more convenient to restrict the lighting of the alarm lamp in units of alarm windows.

Depending on the installation location of the alarm window kill switch, it may be difficult for the operator to confirm which contact is on or off. According to the third aspect of the present invention, the alarm lamp corresponding to the ON contact is lit in a color different from the normal color, so that the operator can turn on the ON / OFF switch.
The off state can be easily grasped. Further, it is possible to prevent the operator from forgetting to return the alarm window activation switch after the completion of the periodic inspection and the repair.

According to a fourth aspect of the present invention, the operation of the alarm window extinguishing switch does not restrict the lighting operation of the alarm lamp but restricts the display of the alarm message on the display device. Thus, as in the case of the first aspect of the present invention, unnecessary confusion with the operator can be prevented.

The invention according to claim 5 relates to an apparatus for displaying the state of all plant input data on a display device. Also in this case, the operator can easily grasp the validity or invalidity of each data by operating the alarm window kill switch.

According to a sixth aspect of the present invention, the operation of the alarm window activation / deactivation switch restricts the printing of an alarm message. Thus, as in the case of the first or fourth aspect of the invention, unnecessary confusion with the operator can be prevented, and wasteful consumption of printing paper can be reduced.

[0030]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. However, the same components as those in FIGS. 15 to 18 are denoted by the same reference numerals, and redundant description will be omitted.

FIG. 1 is a block diagram of the first embodiment of the present invention. This FIG. 1 is different from the conventional example of FIG. 16 in that an alarm window kill switch 10, a kill switch status input means 11,
The alarm window activation state table 12 is added.

The alarm window kill switch 10 has m contacts S1 to Sm corresponding to the number of the m alarm lamps L1 to Lm in the alarm window W1. The operator may turn off the corresponding contact of an alarm lamp that he does not want to turn on due to periodic inspection or the like, that is, an alarm lamp that he wants to “kill”, while the PID level exceeds the alarm level. In the case of a lamp that is to be lit as usual, that is, an alarm lamp that is to be kept "active", the corresponding contact may be turned on.

The activation / deactivation switch state input means 11 turns on / off the contacts S 1 to Sm of the alarm window activation / deactivation switch 10.
An off state is input, and this state is represented by binary data of "1" and "0" and written in the alarm window deactivated state table 12. FIG. 4 shows the contents written in the alarm window kill state table 12. According to this, the alarm lamps ANN-1 (lamp L1), ANN
-2 (lamp L2) is in the "live" state, and the alarm lamp ANN-3 (lamp L3) is in the "killed" state.

Next, the operation of FIG. 1 configured as described above will be described with reference to the flowchart of FIG. The one-axis input circuit I1, the data scanning means 1, and the present value comparing means 4 perform the same operations as in the conventional device shown in FIG.

Then, the alarm lamp lighting determination means 7 reads the contents of the alarm window deactivated state table 12 (step 1), first sets n of "ANN-n" to n = 1, and sets the alarm lamp ANN-1 (lamp). It is determined in order from (L1) whether or not they are "live" (step 2).
In the example shown in FIG. 4, the contact corresponding to the alarm lamp ANN-1 is “1”, so that it is in the “live” state.
Next, the alarm lamp lighting determination means 7 reads the contents of the PID state table 6 (step 3).

Next, the alarm lamp lighting determination means 7 determines whether at least one of the PIDs belonging to the alarm lamp ANN-1 is "1", that is, whether the alarm limit value is exceeded. (Step 4). If it has exceeded, the writing and updating of "1" which means lighting on the alarm window state table 8 is performed (step 5).
The writing and updating of "0" meaning turning off is performed (step 6). If it is determined in step 2 that the alarm lamp ANN-1 is in the "killed" state, the alarm lamp lighting determination means 7 immediately writes and updates "0" (step 6).

Next, the alarm lamp lighting judging means 7 judges whether or not the updating of the writing into the alarm window state table 8 has been completed for all the alarm lamps (step 7). In this case, of course, since the processing has not been completed, n of "ANN-n" is incremented from n = 1 to n = 2 (step 8), and the same is applied to the alarm lamp ANN-2 (lamp L2). Perform the operation. Then, similarly, the same operation is performed up to the last alarm lamp ANN-m (lamp Lm) to update the writing of all the alarm lamps in the alarm window state table 8.

The alarm window control means 9 controls the turning on / off of the alarm lamps L1 to Lm based on the alarm window state table 8 which has been written and updated as described above.

According to the configuration of FIG. 1 as described above, the operator operates the alarm window activation switch 10 based on the schedule of the periodic inspection and the repair before starting the monitoring operation. It is possible to freely decide whether to "kill" the alarm lamp, so if you find an alarm lamp that was turned on after entering the monitoring work, all of its lighting operations should be treated as valid Will be. Therefore, the labor of the operator performing the monitoring work can be reduced, and the reliability of the plant monitoring can be improved.

FIG. 2 is a block diagram of an embodiment according to the second aspect of the present invention. FIG. 2 differs from FIG. 1 in that the alarm window extinguishing switch 10A has only one contact S. Therefore, when the contact S is on, all of the alarm lamps L1 to Lm are in a "live" state. Conversely, when the contact S is off, the alarm lamp L1
~ Lm are all "killed". The alarm window lighting determination means 7 performs the same operation as in FIG.
As a result, the data written in the alarm window state table 8 eventually becomes all "0".

The invention according to claim 1 is applicable not only to a plant having a plurality of shaft units but also to a plant having another general configuration. Since the alarm lamp is extinguished for each axis, it is mainly applied to a plant including a plurality of axis units.

FIG. 3 is a block diagram of an embodiment according to the third aspect of the present invention. FIG. 3 is obtained by adding the restraint warning lamp lighting means 13 to the configuration of FIG. 1. Of course, it is also possible to adopt a configuration in which the restraint warning lamp lighting means 13 is added to the configuration of FIG. 2.

The restraining warning lamp lighting means 13 reads the contents of the warning window killing state table 12 and sets the warning lamp set to "0", that is, the warning lamp in the "killed" state to the lighting color at the time of warning. They are lit in different colors.

In a plant monitoring apparatus including a plurality of shaft units, a large number of alarm windows and alarm window kill switches are arranged in the left and right directions of the operator. Therefore, it may be difficult for the operator to confirm the input status of the contact with respect to the alarm activating / deactivating switch at a remote position. However, according to the configuration of FIG. 3, such a situation can be grasped at a glance. Further, after the regular inspection work and the repair work are completed, the operator needs to return the input state of the contact of the alarm window activation / deactivation switch to the original state. According to the configuration of FIG. Can be prevented.

FIG. 6 is a block diagram of an embodiment according to the fourth aspect of the present invention. This replaces the lighting of the warning lamp in the warning window,
By displaying a predetermined alarm message on a display device such as a CRT, an operator is notified of a plant abnormality.

FIG. 6 differs from FIG. 1 in that the alarm window W in FIG.
1 is that a display device A1 is used instead of 1 and an alarm message table 14 is added in the one-axis monitoring circuit D1. The alarm lamp lighting judgment means 7, the alarm window state table 8 and the alarm window control means 9 of FIG. 1 are respectively replaced by an alarm message display judgment means 7A and a display state table 8A.
And the name of the alarm message display control means 9A. Then, the warning message display determining means 7A reads the data value of each PID in the plant data table 2 and writes it to the warning message table 14.

In FIG. 6, the expression "alarm window" is used in the alarm window extinguishing switch 10, the alarm window extinguishing state table 12 and the like even though the alarm window is removed. In the present invention, since each PID is classified in units of alarm windows, it is assumed that there is an alarm window, and such an expression is used.

FIG. 7 shows the contents of the alarm message table 14 displayed by the display device A1.
“PID NO.”, “Input point name”, “limit value”,
The description contents in each column of "unit" are written in advance, and the data in the column of "current value" are written by reading the plant data table 2 by the warning message display determination means 7A. is there. In the column of "occurrence time", the alarm message display determination means 7A writes data based on its own built-in clock.

FIG. 8 is a flowchart showing the operation of the alarm message alarm judging means 7A in FIG.
FIG. 8 differs from FIG. 5 in that step 4A is inserted between steps 4 and 5.

That is, the warning message display determining means 7
A determines Yes in step 4 and then reads the data value of the corresponding PID from the plant data table 2 in step 4A,
In the "current value" column (see FIG. 7). At this time, the alarm message display judging means 7A also writes in the "occurrence time" field by its own built-in clock. The contents of the other steps are the same as those in FIG.

The alarm message display control means 9A operates the alarm message table 1 in which predetermined items are described.
4 is displayed on the display device A1. At this time, each PID whose data is displayed on the display device A1 is only the PID belonging to the one whose contact has been turned on by operating the alarm window kill switch 10 in advance by the operator. That is, since the PID whose display has been previously excluded by the operator is not displayed on the display device A1, unnecessary confusion of the operator can be prevented.

FIG. 9 is a block diagram of an embodiment according to the fifth aspect of the present invention. In FIG. 6, a predetermined item is displayed as an alarm message only for a PID belonging to a switch whose contact of the alarm window kill switch 10 is on.
On the other hand, in FIG. 9, predetermined items are displayed as list data for all PIDs, and for PIDs belonging to the one with the contact of the alarm window deactivating switch 10 turned on, the display for the PID is invalid. Is added.

FIG. 9 differs from FIG. 6 in that the warning message display determining means 7A and the display state table 8 in FIG.
A, the alarm message display control means 9A and the alarm message table 14 have been renamed to list data message display determination means 7B, list data message display state table 8B, list data message display control means 9B and list data message table 14A, respectively. Is a point.

List data message display determining means 7B
Reads the contents of the PID state table 6 and the alarm window dead state table 12, and writes the normal / abnormal and dead states of all PIDs to the list data message display state table 8B. FIG. 10 shows the contents written in the list data message display state table 8B in this manner. The list data message display determining means 7B also reads the current data values of all PIDs from the plant data table 2 and writes them in the "current value" column of the list data message table 14A.

List data message display control means 9B
Reads the contents of the list data message table and displays predetermined items for all PIDs on the display device A1. At this time, referring to the contents of the list data message display state table 8B, the "killed" state , That is, the PID to be invalidated is marked with an asterisk in the "NO." Column, and the abnormal PID is marked with a ** in the "current value" column. To

FIG. 11 shows an example displayed on the display device A1 by the list data message display means 9B in this manner. In the example of FIG. 11, for example, “A
Although the PID of “001” is abnormal data, this data may be treated as invalid, while “A0”
02 indicates that the data abnormality of the PID must be treated as valid.

According to the configuration shown in FIG. 9, all PIs
The data on D can be displayed, and the PIDs that may be treated as invalid are marked with a sign to that effect, so that the operator can perform more detailed analysis on the plant data without causing confusion. it can.

In the above embodiment, as shown in FIG. 11, the * and ** marks allow the operator to identify the killed state of the PID and whether the PID is normal or abnormal. This may be done freely, and the characters of the corresponding item may be displayed in a different color from the characters of the other items in place of these symbols so that the operator can identify it.

FIG. 12 is a block diagram of an embodiment according to the sixth aspect of the present invention. The invention described in claim 4 of FIG.
Although a predetermined warning message is displayed on a display device such as an RT, the invention according to claim 6 prints the warning message on a printing means such as a printer.

FIG. 12 differs from FIG. 6 in that the display device A1
Is that the alarm message display control means 9A is replaced by an alarm message print control means 9C.

FIG. 13 shows the warning message printing control means 9.
It is a block diagram which shows the structure of C. The warning message print control means 9C includes a warning message print determination means 15, a warning message print command means 16, a previous display state table 8
C and a state change buffer 17.

The display state table 8A stores data indicating the current display state (ie, binary data of “1” and “0” indicating whether or not to display an alarm for each PID). Data indicating the previous display state is stored in the display state table 8C. However, if the state in which the display state does not change continues, the data stored in the previous display state table 8C becomes the data two or more times before. When the data in the display state table 8A and the data in the previous display state table 8C are different from each other, the state change buffer 17 stores the PID numbers for the different data.
Is to be written.

FIG. 14 is a flow chart showing the operation of the warning message print control means 9C configured as described above.

The warning message print determination means 15 reads the contents of the display state table 8A and the previous display state table 8C, compares the display states of both (step 1), and determines whether there is a state change (step 1). 2).

If there is a state change, the NO. To the state change buffer 17
(Step 3) and the display state table 8
Previous display state table 8 using data of A as previous data
Transfer to C (step 4).

Next, the warning message print command means 16
Is the N of the PID written in the state change buffer 17.
O. From the alarm message table 14, and instructs the printer P1 to print the alarm message (step 5). Thus, the printer P1 prints the same one as shown in FIG.

According to the configuration shown in FIGS. 12 and 13, the PID on which the message is printed on the printer P1 belongs to the PID belonging to the one whose contact has been turned on by operating the alarm window switch 10 in advance by the operator. And
In addition, only the PID that has changed state. Therefore,
Unnecessary printing that would cause confusion to the operator is not performed, and printing paper can be prevented from being wasted.

[0068]

As described above, according to the present invention, the alarm window deactivating switch is provided, and unnecessary alarm display can be eliminated in advance. Monitoring reliability can be improved.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an embodiment of the invention described in claim 1.

FIG. 2 is a configuration diagram of an embodiment of the invention described in claim 2;

FIG. 3 is a configuration diagram of an embodiment of the invention described in claim 3;

FIG. 4 is an explanatory diagram showing contents of an alarm window killing state table in FIG. 1;

FIG. 5 is a flowchart relating to the operation of FIG. 1;

FIG. 6 is a configuration diagram of an embodiment of the invention described in claim 4.

FIG. 7 is an explanatory diagram showing a display example of the display device in FIG. 6;

FIG. 8 is a flowchart relating to the operation of FIG. 6;

FIG. 9 is a configuration diagram of an embodiment of the invention described in claim 5.

FIG. 10 is an explanatory diagram showing the contents of a list data message display state table in FIG. 9;

FIG. 11 is an explanatory view showing a display example of the display device in FIG. 9;

FIG. 12 is a configuration diagram of an embodiment of the invention described in claim 6.

FIG. 13 is a block diagram showing a configuration of an alarm message print control unit in FIG. 12;

FIG. 14 is a flowchart relating to the operation of FIG. 13;

FIG. 15 is an overall schematic view of a conventional device.

FIG. 16 is a configuration diagram of a conventional example.

FIG. 17 is an explanatory diagram showing the contents of a plant table in FIG. 16;

FIG. 18 is an explanatory diagram showing the contents of a PID state table in FIG. 16;

[Explanation of symbols]

W ₁ Alarm window L ₁ ~L _m alarm lamp 9 warning window control means 10,10A alarm window Kassatsu switches S ₁ to S _m contact 13 restraining the warning lamp lighting device 9A warning message display control section 9B list data message display control means A ₁ display device P ₁ printer (printing means) 9C alert message printing control means

──────────────────────────────────────────────────続 き Continuing on the front page (72) Koji Ito, Inventor 1 at Toshiba-cho, Fuchu-shi, Tokyo Toshiba Corporation Fuchu Plant (72) Inventor Toshiro Isshiki 1, Toshiba-cho, Fuchu-shi, Tokyo Toshiba Fuchu Plant (72) Inventor Takayuki Kudo 991 Anata-cho, Seto City, Aichi Prefecture Toshiba Aichi Plant (56) References JP-A-6-176285 (JP, A) JP-A-2-216599 (JP, A) JP-A-5-108412 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G08B 23/00-31/00

Claims (6)

(57) [Claims] An alarm window formed by a plurality of alarm lamps, and when a certain plant input data exceeds a predetermined alarm level, an alarm lamp assigned to the plant input data is turned on. An alarm window control unit, comprising: an alarm window kill switch for determining whether to restrict the lighting operation of each of the alarm lamps. For each alarm lamp, when the plant input data assigned to the alarm lamp exceeds a predetermined alarm level, and the contact of the alarm window kill switch corresponding to the alarm lamp is input to the unconstrained side. Only the lighting operation is allowed, the plant monitoring device. 2. A system for monitoring a plant comprising a plurality of axis units from a first axis to an n-th axis, wherein the n units are formed by a plurality of alarm lamps and installed corresponding to each axis unit. When a certain plant input data from each of the axis units exceeds a predetermined alarm level, an alarm lamp of an alarm window corresponding to the axis unit is assigned in advance for the plant input data. And n alarm window control means for causing the alarm lamps to perform a lighting operation. In the plant monitoring apparatus, to determine whether to uniformly restrict the lighting operations of all the alarm lamps in each of the alarm windows. Each of the alarm window control means, for each alarm lamp, the plant input data assigned to the alarm lamp The lighting operation is permitted only when the alarm level exceeds a predetermined alarm level and the contact of the alarm window activation / deactivation switch corresponding to the alarm window control means is input to the unconstrained side. Plant monitoring equipment. 3. The plant monitoring device according to claim 1, wherein, when there is a warning lamp whose lighting operation based on said warning window control means is restricted by an input of said warning window activation switch, said warning lamp is provided. A lighting device for lighting a constraining alarm lamp in a lighting color different from a normal lighting color. 4. It is assumed that there is an alarm window formed by a plurality of alarm lamps, and that plant input data belonging to each alarm lamp is pre-assigned, and that certain plant input data indicates a predetermined alarm level. In the case of exceeding, the alarm message display control means for displaying an alarm message corresponding to the alarm lamp to which the plant input data belongs on a display device. An alarm window activation switch for deciding whether or not to restrict the display, the alarm message display control means, the plant input data assigned to the alarm lamp exceeds a predetermined alarm level, and The contact of the alarm window kill switch corresponding to the alarm lamp is input to the unconstrained side. The plant monitoring device displays the warning message only when the warning message is displayed. 5. It is assumed that there is an alarm window formed by a plurality of alarm lamps, plant input data belonging to each alarm lamp is allocated in advance, and a message regarding a predetermined item is assigned to all plant input data. A list data message display control means for displaying on a display device, comprising: an alarm window deactivating switch for determining whether the display of the message corresponding to the alarm lamp is valid or invalid. The list data message display control means attaches a symbol indicating that the message is invalid to the message of the plant input data belonging to the alarm lamp in which the alarm window activation / deactivation switch is invalid, or a color indicating that the message is invalid. A plant supervisor characterized by the following: Apparatus. 6. It is assumed that there is an alarm window formed by a plurality of alarm lamps, and that plant input data belonging to each of the alarm lamps is allocated in advance, and that certain plant input data indicates a predetermined alarm level. In the case of exceeding the alarm message, the warning message print control means for printing the warning message corresponding to the warning lamp to which the plant input data belongs by the printing means. An alarm window activation switch for determining whether or not to restrict printing is provided, wherein the alarm message print control means is configured such that plant input data assigned to the alarm lamp exceeds a predetermined alarm level, and The contact of the alarm window kill switch corresponding to the alarm lamp is input to the unconstrained side. The plant monitoring device prints an alarm message only when the warning message is displayed.