JP6008717B2 - Display device and display method - Google Patents

Description

  The present invention relates to a display device and a display method for presenting information associated with equipment selected by an operator in a monitoring control system or the like.

  For example, in a power system monitoring and control system, a power system diagram schematically showing a power flow (system) is displayed on a display device, and an operator visually recognizes the display content of the display device and displays a power transmission state and a facility state. Monitor and operate each facility. When confirming the state of a specific facility or changing the state of a specific facility, the operator selects a target facility from a plurality of symbols indicating the facilities arranged on the power system diagram displayed on the display device. Select the symbol to show. Japanese Patent Application Laid-Open No. 2005-228561 discloses a method of changing the display color of a selected symbol, or performing a highlighted display by using a flicker expression for a symbol. Further, in order to clearly indicate the selected symbol and the equipment symbol in which an abnormality has occurred, Patent Literature 2 discloses that the selected symbol is displayed by performing spotlight display that brightly displays the background of the equipment symbol in which an abnormality has occurred. A display method that clearly indicates the difference is disclosed.

  In the power system diagram clearly indicating the selected symbol as described above, the information display area and the operation area for the selected symbol are displayed in the screen area, and the state of the facility is confirmed with reference to the information display area, or The equipment is controlled by inputting operation to the operation area. For example, Patent Document 3 discloses a method of displaying an operation region for a selected symbol at an arbitrary position within the screen of the display device and not overlapping with the power system diagram.

Japanese Patent Laid-Open No. 6-19657 Japanese Patent Laid-Open No. 10-187233 JP-A-6-44020

  However, in the display method disclosed in Patent Document 3 described above, since the selected symbol and the operation area are displayed at positions separated from each other, the operator can determine the interrelationship between the selected equipment and the displayed operation area. There was a problem that it was difficult to recognize. Even if flicker expression is applied to the symbol indicating the selected equipment as in Patent Document 1, the color change area is limited to a small size, so that it is difficult for the operator to recognize the selected equipment, It took time to grasp the relationship, and there was a problem that there was a risk of hindering work. In addition, even when spotlight display is applied to a symbol indicating a facility in which an abnormality has occurred as in Patent Document 2, it is necessary to distinguish the selected symbol from the symbol in which an abnormality has occurred, and a state in which both have been mistaken There was a problem of grasping the mutual relationship with the operation area.

  The present invention has been made to solve the above-described problem, and the mutual relationship between the information display area or the operation area displayed on the screen of the display device and the symbol corresponding to the displayed area, It is intended to display the displayed system diagram clearly without hiding it.

  The display device according to the present invention includes an information selection detection unit that detects a selection operation input to a symbol indicating the facility displayed in the system diagram, and a facility corresponding to the symbol that the information selection detection unit has detected the selection operation. A display information creation unit that creates a display window that displays information about the display, a display position determination unit that determines the display position of the display window created by the display information creation unit, and a display that is arranged at the display position determined by the display position determination unit A connection line that connects the window and the symbol on the system diagram for which the information selection detection unit has detected the selection operation is generated, and color adjustment and arrangement order adjustment that give priority to display of the system diagram are performed on the generated connection line A connection line generation unit, and a window display processing unit that displays a display window and a connection line on the system diagram.

  According to the present invention, the correspondence between the display window (information display area or operation area) displayed on the screen of the display device and the symbol of the equipment corresponding to the display window becomes clear, and the operator Interrelationship with symbols can be easily recognized. Further, it is possible to prevent the mutual relationship with the display window from being grasped in a state where the symbol of the selected facility is mistaken with the symbol of the facility where the abnormality has occurred.

6 is a diagram showing a display example of the display device according to Embodiment 1. FIG. 1 is a block diagram illustrating a configuration of a display device according to Embodiment 1. FIG. 4 is a flowchart showing the operation of the display device according to the first embodiment. 6 is a diagram showing another display example of the display device according to Embodiment 1. FIG. 10 is a diagram illustrating a display example of a display device according to Embodiment 2. FIG. 6 is a block diagram illustrating a configuration of a display device according to Embodiment 2. FIG. 6 is a flowchart illustrating an operation of the display device according to the second embodiment. FIG. 10 is a block diagram illustrating a configuration of a display device according to a third embodiment. It is explanatory drawing which shows the angle information which the display position determination part of the display apparatus by Embodiment 3 produces | generates. 10 is a flowchart illustrating the operation of the display device according to the third embodiment. FIG. 10 is a diagram showing a display example of a display device according to a fourth embodiment.

Embodiment 1 FIG.
FIG. 1 is a diagram showing a display example of a display device according to Embodiment 1 of the present invention.
In the following, a case where the display device of the present invention is used in a power system monitoring system and a power system diagram is displayed on the screen of the display device will be described as an example. The display device can also be applied to monitoring systems or control systems in other fields. This is the same in other embodiments.

  In the display example of the display device 10 shown in FIG. 1, a power system diagram 101, an operation window (display window) 102, and a lead line 103 are displayed on the display screen 100. In the power system diagram 101, power system lines 104 and 105, equipment symbols 106 indicating equipment, equipment names 107, and the like are displayed. The operation window 102 includes an equipment name 102a corresponding to the equipment symbol selected on the power system diagram 101, an operation content 102b, an information area 102c indicating the state of the equipment, or an operation area for performing an operation input on the equipment. 102d etc. are displayed. The lead line 103 is displayed as a straight line connecting the equipment symbol 106 selected on the power system diagram 101 and the operation window 102.

  The operation window 102 is displayed at a position that does not overlap with the power system diagram 101. The lead line 103 is drawn in a display color behind the power system lines 104 and 105 in the power system diagram 101 and lighter than the power system lines 104 and 105. In the power system diagram 101, it is most important to grasp the system relationship of each facility. The power system lines 104 and 105 and a part of the power system diagram 101 are hidden by the operation window 102 and the lead line 103. This is to prevent it.

Next, the configuration of the display device 10 that performs the display shown in FIG. 1 will be described.
FIG. 2 is a block diagram showing the configuration of the display device according to Embodiment 1 of the present invention.
The display device 10 according to the first embodiment includes a system information acquisition unit 1, a system display processing unit 2, an information selection detection unit 3, a window display processing unit 4, and a display unit 5.
The system information acquisition unit 1 acquires system information input from the power system monitoring system side. The system information includes, for example, the connection status of each facility, information on symbol marks of each facility, and the name of each facility. The system display processing unit 2 draws a power system diagram with reference to the system information acquired by the system information acquisition unit 1 and displays it on the display unit 5.

  The information selection detection unit 3 detects an input operation of the operator by clicking with the mouse, no operation at a position where the mouse indicates a cursor, or a certain time elapses, or a touch operation on the touch panel. When a selection operation is input to the symbol, information on the equipment symbol designated by the selection operation is output to the subsequent window display processing unit 4. The equipment symbol information includes information for identifying the equipment symbol on the power system diagram, such as the name of the equipment symbol and the location information of the equipment symbol. In addition, although the mouse | mouth and the touch panel were mentioned as an example as an input means, it is not limited to these.

The window display processing unit 4 includes a display information creation unit 6, an equipment information storage unit 7, a display position determination unit 8, and a connection line generation unit 9.
When the information on the equipment symbol for which the selection operation has been input from the information selection detection unit 3 is input, the display information creation unit 6 acquires the display format of the window corresponding to the selected equipment symbol from the equipment information storage unit 7. . Further, the operation window is created by performing the process of acquiring the equipment state information corresponding to the equipment symbol selected from the equipment state information input from the power system monitoring system side and writing it in the above-described window display format. The created operation window is output to the display position determination unit 8.

  The facility information storage unit 7 stores a display format set in advance for each model of each facility. The display format includes, for example, equipment symbols set for each model, display fields indicating the equipment status set for each model or the numerical value of the equipment status, and operation fields indicating the operation content set for each model. ing. The display position determination unit 8 determines the display position of the operation window created by the display information creation unit 6 when the information of the equipment symbol for which the selection operation is inputted from the information selection detection unit 3 is inputted. The display position determination unit 8 detects a free area in the power system diagram drawn by the system display processing unit 2 and sets the detected free area as the display position of the operation window. The operation window created by the display information creation unit 6 is enlarged or reduced according to the size of the detected empty area as necessary. When there is no free area, the display position determining unit 8 may create a new free area by moving or reducing the power system diagram drawn by the system display processing unit 2.

  Based on the display position determined by the display position determination unit 8 and the position information of the facility symbol to which the selection operation has been input, the connection line generation unit 9 generates a lead line (connection line) that connects the operation window and the facility symbol. Generate. In addition, referring to the power system diagram drawn by the system display processing unit 2, in a region where the generated leader line overlaps the power system line, equipment symbol, equipment name, etc., the leader line is positioned behind the display. Adjust to. Furthermore, the display color of the lead line is adjusted to a color tone lighter than the display color of the power system line. The window display processing unit 4 performs display processing for reflecting the display processing results of the display information creation unit 6, the display position determination unit 8, and the connection line generation unit 9 in the power system diagram input from the system display processing unit 2.

  The display unit 5 is configured by a display or the like, and displays a power system diagram on the display based on the display processing of the system display processing unit 2. In addition, when a power system diagram that has been subjected to a display process for drawing by adding an operation window and a lead line is input from the window display processing unit 4, the power displayed on the display is input from the window display processing unit 4. Update the system diagram.

Next, the operation of the display device 10 will be described.
FIG. 3 is a flowchart showing the operation of the display device according to Embodiment 1 of the present invention.
The system information acquisition unit 1 acquires system information from the power system monitoring system side (step ST1). The grid display processing unit 2 performs display processing for drawing the power system diagram with reference to the system information acquired in step ST1, and displays the drawn power system diagram on the display unit 5 (step ST2). Next, the information selection detection unit 3 determines whether or not an equipment symbol selection operation has been input (step ST3). If the equipment symbol selection operation has not been input (step ST3; NO), the process returns to step ST1 and the above-described process is repeated. On the other hand, when an instruction to select an equipment symbol is input (step ST3; YES), the information selection detection unit 3 outputs information on the selected equipment symbol to the window display processing unit 4 (step ST4).

  The display information creation unit 6 refers to the equipment symbol information input in step ST4, obtains the display format of the equipment symbol window from the equipment information storage unit 7 (step ST5), and obtains it from the power system monitoring system side. The equipment state information thus written is written in the display format acquired in step ST5 to create an operation window (step ST6). The display position determination unit 8 determines the display position of the display window created in step ST6 (step ST7).

  The connection line generation unit 9 generates a lead line connecting the selected equipment symbol in the power system diagram and the operation window whose display position is determined in step ST7, and adjusts the display with the display of the power system diagram (step ST8). ). The window display processing unit 4 performs processing to reflect the display processing of steps ST6, ST7, and ST8 on the power system diagram displayed in step ST2 (step ST9), and the display unit 5 updates the displayed power system diagram ( Step ST10), the process is terminated.

The display example shown in FIG. 1 will be described based on the flowchart shown in FIG.
When the selection operation of the facility symbol 106 of the facility name “302” is input on the power system diagram 101, the display format of the operation window 102 is displayed as step ST5. In the example of FIG. 1, when “switch” is selected, the display format accepts “switch operation” and includes an area where the equipment name 102 a is displayed and three information areas or operation areas 102 c, A display format provided with an area for displaying 102d is acquired.

  In the process of step ST7, it is determined that the operation window 102 is arranged above the right end of the display screen 100. In step ST8, a leader line 103 is created that connects one corner 102e of the operation window 102 disposed above the right end of the display screen 100 and the facility symbol 106. Further, since the created lead line 103 overlaps with the system line 104, the display color of the lead line 103 is further adjusted to a lighter color than the display color of the system line 104 so that the lead line 103 is positioned on the back of the system line 104. . Through these processes, as shown in FIG. 1, the connection between the selected facility symbol 106 and the operation window 102 can be clearly shown without hiding the display element of the power system diagram.

FIG. 4 is a diagram showing another display example of the display device according to Embodiment 1 of the present invention.
In FIG. 4, a ring-shaped highlighting 108 surrounding the equipment symbol 106 is given to the equipment symbol 106 to which the selection operation is input, and a lead line 103 connecting the highlighting 108 and the operation window 102 is displayed. Created. In this way, the highlighting 108 that clearly displays the selected equipment symbol 106 is performed, and the leader line 103 that connects the highlighting 108 and the operation window 102 is drawn, whereby the visibility of the selected equipment symbol is improved. This improves the interrelationship between the equipment symbol and the operation window.

  As described above, according to the first embodiment, the display information creation unit 6 that creates the operation window by writing the equipment state information in the display format of the window corresponding to the selected equipment symbol, and the display position of the operation window The display position determination unit 8 for determining the power line, and the connection line generation unit 9 for generating a lead line that connects the operation window arranged at the display position and the equipment symbol on the power system diagram. The interrelationship between the selected equipment symbol and the operation window can be clearly shown without hiding the display element. As a result, the operator can easily grasp the interrelationship between the selected equipment symbol and the operation window.

  Further, according to the first embodiment, the connection line generation unit 9 is configured to arrange the lead-out line on the back of the system line and adjust the color tone to be lighter than the display color of the system line. It is prevented from being divided into lead lines and does not hinder the system state grasping operation by the operator.

Embodiment 2. FIG.
In the second embodiment, a configuration is shown in which the separation distance between the facility symbol selected in the power system diagram and the operation window is displayed so as to be visible.
FIG. 5 is a diagram showing a display example of the display device according to the second embodiment of the present invention. In FIG. 5, a leader line 103 ′ connecting the selected equipment symbol 106 and the operation window 102 is drawn so as to gradually increase from the equipment symbol 106 toward the operation window 102. Specifically, the lead line 103 ′ forms a triangle having apexes at the three points of the equipment symbol 106, the first connection point 102 f and the second connection point 102 g located on the same side of the operation window 102. .

Next, the configuration of the display device 10 that performs the display shown in FIG. 5 will be described.
FIG. 6 is a block diagram showing a configuration of a display device according to Embodiment 2 of the present invention.
In the second embodiment, a connection line shape adjusting unit 11 is additionally provided in the window display processing unit 4. In the following, the same or corresponding parts as those of the display device 10 according to the first embodiment are denoted by the same reference numerals as those used in the first embodiment, and the description thereof is omitted or simplified.

  The connection line generation unit 9 ′ generates a linear lead line as in the first embodiment, and then acquires position information of the first connection point that is a connection point between the linear lead line and the operation window. . The acquired position information is output to the connection shape adjusting unit 11 together with the facility symbol position information. The connection line shape adjustment unit 11 refers to the position information of the first connection point acquired by the connection line generation unit 9 ′, and sets the second connection point at a position separated from the first connection point by a predetermined amount. . Note that the first connection point and the second connection point only need to be located on the same side of the operation window, and the second connection point is separated upward or downward with respect to the first connection point. You may do it. The connection line shape adjusting unit 11 forms a triangle having the first connection point, the second connection point, and the selected equipment symbol as a vertex, and the inner area of the formed triangle is displayed in a lighter color than the system line. Filled with lead lines.

  The window display processing unit 4 performs a display process of drawing the operation window and the selected equipment symbol on the power system diagram displayed by the system display processing unit 2 and the lead line whose connection line shape adjusting unit 11 has adjusted the shape to a triangle. The power system diagram displayed on the display unit 5 is updated.

Next, display processing of the display device 10 according to the second embodiment will be described with reference to the flowchart of FIG. In the following, the same steps as those of the display device 10 according to the first embodiment are denoted by the same reference numerals as those used in FIG. 3, and the description thereof is omitted or simplified.
When the display position of the operation window is determined in step ST7, the connection line generation unit 9 ′ determines the selected equipment symbol in the power system diagram displayed in step ST2 and the operation window whose display position is determined in step ST7. A lead line to be connected is generated, and the position information of the selected equipment symbol and the position information of the first connection point that is the connection point between the generated lead line and the operation window are acquired (step ST21).

  The connection line shape adjustment unit 11 determines the second connection point based on the position information of the first connection point acquired in step ST21 (step ST22), and the position information of the first and second connection points. And the lead line is adjusted to a triangular shape based on the position information of the equipment symbol (step ST23). Thereafter, the window display processing unit 4 performs a process of reflecting the display processes of steps ST6, ST7, and ST23 on the power system diagram displayed at step ST2 (step ST24), and updates the power system diagram displayed on the display unit 5. (Step ST10), and the process ends.

  As described above, according to the second embodiment, the second connection point is formed at a position separated from the first connection point by a predetermined amount, and the first connection point, the second connection point, and the selected one are selected. Since a triangle having the equipment symbol as a vertex is formed and the connection line shape adjusting unit 11 is provided as a lead line, the operator can select two sides extending from the operation window toward the equipment symbol. It can be easily determined that it is located near the intersection of. Further, it is possible to easily recognize how far the selected equipment symbol exists from the operation window from the angle formed by the two sides extending from the operation window toward the equipment symbol.

Embodiment 3 FIG.
In the third embodiment, a configuration in which a system line and a lead line on the power system diagram are clearly distinguished and displayed is shown.
FIG. 8 is a block diagram showing a configuration of a display device according to Embodiment 3 of the present invention. In the third embodiment, a display position determination condition management unit 12 is additionally provided in the window display processing unit 4 of the display device 10 of the first embodiment shown in FIG. In the following, the same or corresponding parts as those of the display device 10 according to the first embodiment are denoted by the same reference numerals as those used in the first embodiment, and the description thereof is omitted or simplified.

  When the operation window is arranged at the display position determined by the display position determination unit 8, the display position determination condition management unit 12 intersects the line segment connecting the selected equipment symbol and the operation window and the line segment. Angle information indicating the angle formed by the line is generated.

  In general, grid lines in the power system diagram are drawn using horizontal lines extending in the horizontal direction of the display screen and vertical lines extending in the vertical direction of the display screen, and a clear angular difference with respect to these horizontal lines and vertical lines. By keeping this, the visibility of the lead line can be improved. Therefore, the angle information generated by the display position determination condition management unit 12 includes a line segment 203 connecting the equipment symbol 201 and the connection point of the operation window 202, and a horizontal line in the power system diagram, as shown in FIG. Information indicating an angle 205 formed by 204 or a line segment 203 ′ connecting the equipment symbol 201 ′ and the connection point of the operation window 202 as shown in FIG. 9B and a vertical line 206 in the system diagram. This is information indicating the angle 207.

  Based on the generated angle information, the display position determination condition management unit 12 sets in advance the angle formed by the line segment connecting the selected equipment symbol and the operation window and the horizontal or vertical system line in the system diagram. It is determined whether or not it is equal to or greater than the threshold value. If the angle is less than the threshold value, it is determined that the line connecting the selected equipment symbol and the operation window may be confused with the system line, and the operation window is set so that the angle is equal to or greater than the threshold value. An instruction to adjust the display position again is output to the display position determination unit 8. At this time, information indicating the adjustment amount may be output together. The display position determination unit 8 adjusts the position where the operation window is displayed again based on the input readjustment instruction, and outputs the determined display position information to the connection line generation unit 9.

Next, display processing of the display device 10 according to the third embodiment will be described with reference to the flowchart of FIG. In the following, the same steps as those of the display device 10 according to the first embodiment are denoted by the same reference numerals as those used in FIG. 3, and the description thereof is omitted or simplified.
When the display position of the operation window is determined in step ST7, the display position determination condition management unit 12 provides a line segment connecting the selected equipment symbol and the operation window when the operation window is arranged at the determined display position. Angle information is generated (step ST31).

  Based on the angle information generated in step ST31, the display position determination condition management unit 12 determines whether the angle formed by the line segment connecting the selected equipment symbol and the operation window and the system line is equal to or greater than a threshold value. (Step ST32). When the angle is equal to or larger than the threshold (step ST32; YES), the display position determination condition management unit 12 outputs the display position information determined in step ST7 to the connection line generation unit 9 via the display position determination unit 8. (Step ST33). On the other hand, when the angle is less than the threshold (step ST32; NO), the display position determination condition management unit 12 outputs an instruction to adjust the display position of the operation window (step ST34). The display position determination unit 8 adjusts the display position of the operation window again based on the display position adjustment instruction input in step ST34, and outputs the display position information after the adjustment again (step ST35).

  The connection line generation unit 9 generates a leader line that connects the selected equipment symbol in the power system diagram displayed in step ST2 and the operation window whose display position is determined in step ST33 or step ST35. Is adjusted (step ST8). Thereafter, the same processing as steps ST9 and ST10 shown in the first embodiment is performed.

  As described above, according to the third embodiment, angle information indicating the angle between the line segment connecting the selected equipment symbol and the operation window and the system line intersecting with the line segment is generated. Is provided with a display position determination condition management unit 12 that outputs an instruction to readjust the display position to the display position determination unit 8 when the value is less than a preset threshold value. The difference in angle can be kept clear, and the operator can be prevented from making a mistake in determining the lead line and the system line.

  The configuration of the third embodiment can also be applied to the second embodiment. In that case, a line segment connecting the facility symbol and the first connection point can be used as a line segment connecting the selected facility symbol and the operation window.

Embodiment 4 FIG.
In the fourth embodiment, a configuration is shown in which the current state of the selected equipment is displayed so that it can be easily grasped visually.
A current state display area for visually displaying the current state of the equipment is provided in a display format for writing the equipment state information for the equipment symbol selected when the display information creating unit 6 creates the operation window. The current state display area may be configured so that the current state of the equipment such as the operating state, the stopped state, the energized state or the non-energized state can be displayed as an image, or the current control value of the facility can be described. May be. Further, the current state may be displayed as an image, and the control value may be displayed together. Moreover, when a system | strain diagram shows the system | strain of piping, you may comprise so that specific numerical values, such as the opening degree of piping, can also be described. The display information creation unit 6 performs a process of acquiring an operation state, a control value, and the like indicating the current state of the installation unit from the equipment state information input from the power system monitoring system side, and writing it in the display format.

FIG. 11 is a diagram showing a display example of the display device according to the fourth embodiment of the present invention.
In the operation window 102 shown in FIG. 11, in the current state display area 102h provided next to the equipment name 102a, the equipment symbol diagram number is displayed to indicate the current equipment state. By referring to the current state display area 102h, the operator can perform a control operation of the facility while confirming the current state of the facility in the operation window 102.

  As described above, according to the fourth embodiment, since the current state display area for visually displaying the current state of the equipment is provided in the operation window, the operator performs an operation in the operation window. Operation input can be performed while confirming the current state of the equipment. As a result, even when the equipment symbol indicating the selected equipment and the operation window are arranged at a distance, the current state of the selected equipment without greatly removing the line of sight from the operation buttons on the operation window. Can be confirmed.

  In addition, in Embodiment 1 to Embodiment 4 described above, the case where an operation window that allows an operator to input an operation has been described as an example, but a display window that only presents information indicating the state of equipment is displayed. It is also possible to configure so as to. In this case, the operator can confirm the facility information associated with the facility symbol by selecting any facility symbol.

  In the present invention, within the scope of the invention, any combination of the embodiments, or any modification of any component in each embodiment, or omission of any component in each embodiment is possible. .

  1 system information acquisition unit, 2 system display processing unit, 3 information selection detection unit, 4 window display processing unit, 5 display unit, 6 display information creation unit, 7 facility information storage unit, 8 display position determination unit, 9, 9 ′ Connection line generation unit, 10 display device, 11 connection line shape adjustment unit, 12 display position determination condition management unit.

Claims (5)

In a display device including a system display processing unit that generates a system diagram showing a connection state between a plurality of facilities arranged in a monitoring area, and a display unit that displays a system diagram generated by the system display processing unit,
An information selection detection unit for detecting a selection operation input for a symbol indicating the facility displayed in the system diagram;
The information selection detection unit determines a display information generation unit that generates a display window for displaying information related to the facility corresponding to the symbol for which the selection operation has been detected, and a display position of the display window generated by the display information generation unit Generating a connection line connecting the display position determining unit, the display window arranged at the display position determined by the display position determining unit, and the symbol on the system diagram in which the information selection detecting unit has detected a selection operation; A connection line generation unit that performs color tone adjustment and arrangement order adjustment to give priority to display of the system diagram for the generated connection line, and displays the display window and the connection line on the system diagram A display device comprising a processing unit.   A point at which the connection line generated by the connection line generation unit is connected to one side of the display window is defined as a first connection point, and the same side of the display window is separated from the first connection point by a predetermined distance. A second connection point is set, and a triangular area having the symbol on the system diagram on which the first connection point, the second connection point, and the selection operation are input as a vertex is defined as the connection line. The display device according to claim 1, further comprising a connection line shape adjusting unit.   When the display window is arranged at the display position determined by the display position determining unit, the system diagram in which a line segment connecting the display window and the symbol on the system diagram to which the selection operation is input intersects A display position determination that calculates an intersection angle with a system line to be configured and instructs the display position determination unit to readjust the display position of the display window when the calculated intersection angle is less than a preset threshold value The display device according to claim 1, further comprising a condition management unit.   The display information creation unit visually displays a current state of equipment corresponding to the symbol to which the selection operation is input in the display window. The display device according to any one of the above. In the display method of displaying on the screen a system diagram showing the connection state between the equipment arranged in the monitoring area,
An information selection detection unit detecting a selection operation input to a symbol indicating the facility displayed in the system diagram;
A step of creating a display window for displaying information related to equipment corresponding to the symbol for which the selection operation has been input;
A step of determining a display position of the display window in the system diagram by a display position determination unit;
The connection line generation unit generates a connection line that connects the display window arranged at the determined display position and the symbol to which the selection operation is input, and displays the system diagram for the generated connection line Performing color tone adjustment and arrangement order adjustment giving priority to
A window display processing unit comprising the step of displaying the display window and the connection line on the system diagram.

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