JP2003081545A - Equipment condition display system, program, display method, and equipment condition monitor control system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To quickly detect the generation of an unusual condition of equipment, to quickly detect the equipment in the unusual condition, and to quickly detect the detail present condition of the equipment. SOLUTION: This equipment condition display system is provided with a means for displaying a symbol meaning the equipment at a place provided with the specified equipment on a map displayed can a screen, a means for relating the screen showing the detail condition of the equipment corresponding to the symbol displayed by the display means, and a means for storing the condition for changing the display of the corresponding symbol in response to a change of the equipment condition.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facility status display system, a facility status monitoring control system, and the like, by which the status of equipment such as an elevator can be easily monitored on the screen of a display device.

[0002]

2. Description of the Related Art Generally, in order to efficiently monitor equipment such as a plurality of elevators, it is sufficient to collect information from the equipment at one place so that the state of the equipment can be grasped. However, if the state of each facility is large, there is too much information, and it becomes difficult to immediately grasp the state of each facility.

In the conventional monitoring panel system for monitoring the state of these facilities, since the signal transmission / reception to / from each facility such as an elevator or an escalator is individually performed by the level line, the signal line becomes huge, and It was not possible to know the state of each facility in detail. In addition, it is usually difficult to immediately know where the equipment in that state is.

Therefore, in the past, it was difficult for the supervisor to know immediately even when a specific facility needed to be investigated immediately.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is that a certain equipment is in an abnormal state and By providing an equipment status display system, equipment status monitoring control system, etc. that can immediately know where the equipment is, or the current detailed status of the equipment. is there.

[0006]

According to claim 1 of the present invention, means for displaying a symbol representing the facility on a map displayed on the screen at a place where the specific facility is installed, and The symbol displayed by the means, means for associating a screen showing a detailed state of the corresponding equipment, and means for storing a condition for changing the display of the corresponding symbol due to a change in the state of the equipment. (EN) Provided is a facility status display system characterized by the following.

According to claim 2 of the present invention, a means for displaying a symbol representing the facility at a place where the specific facility is installed on the map displayed on the screen, and the means for displaying the symbol. By means of associating the symbol with a screen showing the detailed state of the corresponding equipment, means for storing a condition for changing the display of the corresponding symbol due to a change in the state of the equipment, and by specifying the symbol, And a means for displaying a detailed status of the equipment corresponding to the symbol, which provides a status display system for the equipment.

According to claim 3 of the present invention, a means for displaying a symbol representing the facility at a place where the specific facility is installed on the map displayed on the screen, and the means for displaying the symbol. The symbol is associated with a screen showing a detailed state of the corresponding equipment, a means for storing a condition for changing the display of the corresponding symbol due to a change in the state of the equipment, and the equipment corresponding to the symbol is And a means for changing the display of the corresponding symbol when the condition stored in the database is satisfied, the facility status display system being provided.

According to claim 4 of the present invention, a means for displaying a symbol indicating the facility at a place where a specific elevator facility is installed on the map displayed on the screen, and the means for displaying the symbol. A means for associating the symbol with a screen showing a detailed state of the corresponding elevator installation; a means for storing a condition for changing the display of the corresponding symbol due to a change in the state of the elevator installation;
A facility status display system comprising: means for displaying a detailed status of an elevator installation corresponding to the symbol by specifying the symbol.

According to claim 5 of the present invention, a means for displaying a symbol representing a specific elevator facility on the map displayed on the screen at a place where the specific elevator facility is installed, and the means for displaying the symbol. Means for associating with the symbol a screen showing a detailed state of the corresponding elevator installation, condition storage means for storing a condition for changing the display of the corresponding symbol due to a change in the state of the elevator installation, and the symbol And a means for changing the display of the corresponding symbol when the corresponding elevator equipment satisfies the condition stored in the condition storage means.

According to a sixth aspect of the present invention, a function of displaying a symbol indicating a facility on a computer where a specific facility is installed on a map displayed on the screen, and a function of displaying the symbol. A function of associating a screen showing a detailed state of the corresponding facility with the generated symbol, and a function of storing a condition for changing the display of the corresponding symbol due to a change in the state of the facility. Provide a program for displaying the status of equipment.

According to claim 7 of the present invention, a function of displaying a symbol representing a specific elevator installation on a map displayed on the screen of the computer at a place where the specific elevator installation is installed, and this function The displayed symbol, a function of associating a screen showing a detailed state of the corresponding elevator installation, a function of storing a condition for changing the display of the corresponding symbol due to a change in the state of the elevator installation, and the symbol Is provided to realize a function of displaying a detailed state of the elevator equipment corresponding to the symbol, and a program for displaying the state of the equipment is provided.

According to claim 8 of the present invention, a function of displaying a symbol representing a specific elevator facility on a map displayed on a screen at a place where a specific elevator facility is installed, and this function A function of associating a screen showing a detailed state of the corresponding elevator installation with the displayed symbol, a condition storage function of storing a condition for changing the display of the symbol due to a change in the state of the elevator installation, and the symbol And a function for changing the display of the corresponding symbol when the elevator facility corresponding to the condition satisfies the condition stored in the condition storage function.

According to claim 9 of the present invention, a step of displaying a symbol representing the facility at the place where the specific facility is installed on the map displayed on the screen, and the step of displaying the symbol displayed by this means. In the equipment status display method, the condition storage means comprises a step of associating a symbol with a detailed screen showing a detailed status of the corresponding equipment, and a condition storage step of storing a condition for changing the display of the symbol. When the condition stored in is satisfied,
Displaying the status of the facility, comprising: changing the display of the symbol; and, when the symbol is identified, displaying the detailed screen of the facility corresponding to the identified symbol. Method.

According to a tenth aspect of the present invention, a monitoring equipment block which has an equipment control unit for controlling the equipment to be monitored and which transmits a status signal indicating the status of the equipment, and a monitoring equipment block which is transmitted from this monitoring equipment block. A facility status monitoring system comprising a facility status display system for receiving the status signal for displaying the status of the facility and transmitting a control signal for the facility to the monitoring facility block, wherein the facility status display system is a screen. Means for displaying a symbol indicating the facility at the location where the specific facility is installed on the map displayed in, and a screen showing the detailed state of the previous period facility corresponding to the symbol displayed by this means. Means for associating with each other, means for storing a condition for changing the display of the corresponding symbol due to a change in the state of the equipment, and specifying the symbol By this means, it is provided with means for displaying a detailed state of the equipment corresponding to this symbol, and means for transmitting an operation signal for operating the equipment in the equipment control block to the monitoring equipment block. To provide a facility condition monitoring control system.

According to the eleventh aspect of the present invention, a monitoring equipment block which has an equipment control unit for controlling the equipment to be monitored and which transmits a status signal indicating the status of the equipment, and a monitoring equipment block which is transmitted from this monitoring equipment block. A facility condition monitoring system comprising a facility condition display system for receiving the condition signal and displaying the condition of the facility and transmitting a control signal for the facility to the monitoring facility block, wherein a plurality of the monitoring facility blocks, A means for converting the control information into a unified common map, and a common map transmission / reception program in which the elevator facility condition monitoring system has a one-to-one correspondence with the plurality of monitoring facility blocks, and means for transmitting / receiving the common map are provided. An equipment condition monitoring control system is provided.

According to a twelfth aspect of the present invention, a monitoring equipment block having an equipment control unit for controlling the equipment to be monitored and transmitting a status signal indicating the status of the equipment, and the monitoring equipment block transmitting the status signal. In the equipment condition monitoring and control system, which receives the status signal indicating the status of the equipment and transmits a control signal for the equipment to the monitoring equipment block, a status corresponding to each of the equipment is detected. Then, the equipment-side common map that the monitoring equipment block has, and the monitoring-side common map that the equipment status display system has by detecting the states corresponding to the respective equipment, so that the monitoring equipment block, There is provided a facility condition monitoring and control system characterized by communicating between the facility condition display systems.

According to a thirteenth aspect of the present invention, a monitoring equipment block which has an equipment control unit for controlling the equipment to be monitored and which sends a status signal indicating the status of the equipment, and a monitoring equipment block which is transmitted from this monitoring equipment block. In the equipment condition monitoring and control system, which comprises a facility status display system that receives the status signal and displays the status of the equipment, and transmits a control signal for the equipment to the monitoring equipment block, the monitoring equipment block includes the status of each facility. And a means for transmitting a synchronization signal including a facility side common map corresponding to the above, the monitoring equipment block means for holding the transmitted contents, and the equipment state display system side, from the monitoring equipment block side in the common map to the equipment Status The system status table shows control signals to the system side and operation signals from the equipment status display system to the monitoring equipment block side. A means to set a common map on the system side, a means to send the contents of the common map set on the equipment status display system side to the monitoring equipment block side, and a means to send the contents from the equipment status display system side on the monitoring equipment block side. Means for comparing the contents of the common map received and the held common map, and if they are the same, it is determined that synchronization has been achieved, and if they are not the same as the comparison, it is determined that synchronization has not been established, and again The present invention provides a facility condition monitoring and control system, which is provided with means for transmitting a synchronization signal.

According to a fourteenth aspect of the present invention, a monitoring equipment block which has an equipment control unit for controlling the equipment to be monitored and which transmits a status signal indicating the status of the equipment, and a monitoring equipment block which is transmitted from this monitoring equipment block. A facility status monitoring system comprising a facility status display system for receiving the status signal for displaying the status of the facility and transmitting a control signal for the facility to the monitoring facility block, wherein the facility status display system is a screen. Symbol display means for displaying a symbol representing the facility at the location where the specific facility is installed on the map displayed on, and an operation signal for operating the facility displayed by the symbol display means for the monitoring facility. An operation signal transmission means for transmitting to the block, and the equipment state display system is always at a constant timing from the equipment state display system. A means for sending the status to the common map and sending it to the monitoring equipment block, the content of the operation signal of the common map received by the monitoring equipment block side, and the content of the operation signal of the common map showing the control status of the monitoring equipment block side. When it is detected that there is a difference between the means for comparison and the above comparison, a means for sending a resending signal including a common map from the monitoring equipment block side to the equipment status display system side, and a resending signal for the equipment status display system side are received. At this time, the content of the operation signal of the current equipment status display system is placed on the common map, and a means for sending the operation signal to the monitoring equipment block side several times at regular intervals and a common map receiving the operation signal on the monitoring equipment block side. And the common map when the next operation signal is received are compared, and if they are the same, the operation of the common map, which is the control signal of the monitoring equipment block, is performed. Providing equipment status monitoring and control system characterized by comprising means for setting the signal portion.

According to a fifteenth aspect of the present invention, a monitoring equipment block which has an equipment control unit for controlling the equipment to be monitored and which sends a status signal indicating the status of the equipment, and a monitoring equipment block which is transmitted from this monitoring equipment block. A facility status monitoring system comprising a facility status display system for receiving the status signal for displaying the status of the facility and transmitting a control signal for the facility to the monitoring facility block, wherein the facility status display system is a screen. Symbol display means for displaying a symbol representing the facility at the location where the specific facility is installed on the map displayed on, and an operation signal for operating the facility displayed by the symbol display means for the monitoring facility. An operation signal transmission means for repeatedly transmitting to the block is provided, and the equipment state display system always displays the equipment state at a constant timing. Place the state of the stem to a common map,
A means for sending to the monitoring equipment block and a means for sending the contents of the operation signal of the equipment status display system on the common map at the timing when the operation signal is input, and sending it to the monitoring equipment block side at a predetermined number of times as the operation signal On the monitoring equipment block side, the common map that received the operation signal is compared with the common map when the next operation signal is received, and if they are the same, the operation signal portion of the common map that is the control signal of the monitoring equipment block. A facility condition monitoring and controlling system is provided, which is provided with a means for setting.

According to a sixteenth aspect of the present invention, a monitoring equipment block having an equipment control unit for controlling the equipment to be monitored and transmitting a status signal indicating the status of the equipment; A facility status monitoring system comprising a facility status display system for receiving the status signal for displaying the status of the facility and transmitting a control signal for the facility to the monitoring facility block, wherein the facility status display system is a screen. Symbol display means for displaying a symbol representing the facility at the place where the specific facility is installed on the map displayed on the screen, and operation for inputting an operation signal for operating the facility displayed by the symbol display means. Input means and operation signal transmission for repeatedly transmitting the operation signal input by the operation input means to the monitoring equipment block after a predetermined time. Means and an operation signal transmission canceling means for canceling the transmission of the operation signal when a signal for canceling the operation input by the operation input means is input before the operation signal transmitting means transmits the operation signal, The contents of the operation signal of the equipment status display system are shared at the timing when the operation signal is input and the means for sending the status of the equipment status display system to the common map at a constant timing from the equipment status display system and sending it to the monitoring equipment block. A means to send it to the monitoring equipment block side several times as an operation signal at a constant interval on the map and the monitoring equipment block side compares the common map that received the operation signal with the common map when the next operation signal was received. Then, if they are the same, a means for setting the operation signal portion of the common map, which is the control signal of the monitoring equipment block, should be provided. Providing equipment condition monitoring control system according to symptoms.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an example of the system configuration of an embodiment of the present invention when an elevator is used as the facility to be monitored.

This elevator equipment status display system 10
Reference numeral 1 indicates a communication unit 103 provided in each elevator for transmitting and receiving information via a monitoring equipment block 102 and Ethernet (registered trademark), and status change information 104 of each elevator equipment received by the communication unit 103. An elevator information display unit 105, a specification information database (DB) 106 that determines this display information, and a building background display unit 10 that displays a background on a monitor screen that monitors the state of each facility.
7 and part information D that displays the symbol on the monitor screen
B108, a screen information DB 109 that obtains information on a symbol displayed on the screen when the symbol is displayed on the screen, a composite screen display unit 110 that composites and displays these symbols and background, and an operator. Sends the control information to the mouse / keyboard 111, and the information input from the mouse / keyboard 111 to the elevator information display unit 105 and the composite unit 113 of the composite screen, and also to the communication unit 103 as the control signal information 112. And an elevator control signal input section 114.

The monitoring equipment block 102 is a unit to be monitored for the state of the elevator. Although only one is shown in FIG. 1, there are actually a plurality of units. Each of these monitoring equipment blocks 102 includes an elevator control unit 116 and a communication unit 11.
This communication unit 117 is connected to the communication unit 103 of the elevator equipment status display system 101 and TCP / TCP.
Information is exchanged using the IP protocol.

When the status of an elevator (not shown) to be monitored by the monitoring equipment block 102 changes, the elevator control section 116 sends the status change information to the communication section of the elevator equipment status display system 101 via the communication section 117. Sent by Ethernet to 103.

State change information 1 received by the communication unit 103
04 is linked to the information in the specification information DB 106 and sent to the elevator information display unit 105. In the elevator information display unit 105, the information of the symbol to be displayed corresponding to the elevator equipment is acquired from the component information DB 108 and displayed on the composite screen display unit 110. At this time, a background diagram of the building to be displayed is acquired from the building background display unit 107, and the symbols of the elevator information display unit 105 are combined so as to be arranged on the building background. This point will be described in detail later. This combined screen becomes a monitor display screen (monitor screen) for monitoring when used.

Thus, the user can visually check the arrangement intervals of the elevators installed in the building and monitor the elevators because the elevators are installed on the background of the building. Further, the symbols used in the elevator information display unit 105 and the elevator control signal input unit are associated (linked) with the screen information DB 109, and when each symbol is selected with a mouse or the like, the destination of the screen is acquired. , The screen can be displayed.

Next, in this embodiment of the present invention, a method of creating symbols displayed on the composite screen display section 110 will be described with reference to the drawings.

On the editor screen of the software such as the Visual Basic editor, as shown in FIG.
The hierarchical structure of the range for which detailed information is desired is determined by multiple layers. First, the layer 201 determines a layout including a building. Next, in block 203 in layer 202, the range is indicated by placing a building symbol. Next, by placing the symbols 205 of the banks (areas) A, B, and C in the layer 204 within the range of the building, the range in the building where the detailed information is desired to be viewed is determined. Further in the layer 206 above it, placing an elevator installation symbol 207 in each bank will indicate the elevators in that bank. The screen created in this way is as shown in FIG.

That is, in the elevator information display section 105,
The symbol 207 of the elevator equipment (unit), the symbol 205 of the bank, and the symbol 203 of the building are arranged so that it looks like there is a bank in the building and an elevator in the bank. As a result, the user looks like the elevators in the building are actually arranged, as if he / she were looking into the building from directly above.

As will be described later, since information for displaying a detailed screen is linked under each symbol, clicking each symbol will cause the current state of the elevator in the range corresponding to that symbol to be displayed. Will be displayed. Each symbol is a bank symbol in the building,
Since the screens are piled up, such as the elevator symbol in the bank symbol, you can select each symbol with the mouse.In addition, in this system, the mouse and each symbol only overlap, The surroundings can be highlighted to inform the user that the mouse position matches each symbol.

Next, the setting of the symbol displayed on the composite screen and the link associated with the symbol will be described with reference to the drawings.

FIG. 3 shows how to set links in this case. As described above, the symbol 302 matched to the specifications of each property is dragged by the mouse from the component corner 301 on the screen of the software editor and placed at each position on the composition screen 303 (1). Next, the arranged symbols 302 are associated with the destination state detail screen 304 by changing the parameters. This information is image information D
It is stored in B109 and is used when the status detail screen is moved (2). This destination state detail screen 304 is a screen that displays in detail the state of the elevator equipment within the symbol. Next, the symbol 302 is the specification information DB 10
The conditions associated with No. 6 and defining when in this symbol to change the display of symbol 302 are stored in this database (3).

The program created in this way is
The installation CD is created by compiling as shown at 310 in FIG. 3, and the CD 311 is provided to the customer. For example, as shown in FIG. 4A, the layout of the entire building is shown by diagonal lines. , A1 building, B building, C
The symbols of buildings such as ridges are arranged, the symbols of hangs are arranged in those buildings, and the symbols of elevator equipment are arranged in these hangs. FIG. 4B is an enlarged view of the inside of the A1 building of FIG. 4A, and FIG. 4C is an enlarged view of a hang, for example, the hang 3.

Therefore, when the A1 building is clicked in FIG. 4A, the screen in FIG. 4B is displayed. Further, when the hang 3 in the A1 building is clicked in FIG. 9A, the same figure C is displayed. The hang 3 has elevators No 1, No 2, ..., And the moving states of those elevators are shown. In this way, the symbols indicating each facility can be specified in a hierarchical manner from the most specific elevator to the whole building, and the details of the state of each facility can be known.

FIG. 4 (d) is a diagram showing the state of the car of each elevator installation in each hang. The state of this elevator is represented, for example, as shown in FIG. The upper part of the square representing each elevator shows the direction of movement of the elevator car (up and down), the state where the door is open, the breakdown stop, etc.
Displayed in color. For example, in the case of normal operation, failure, inspection operation, control operation, emergency operation, rescue operation, and dedicated operation, they are represented by green, red, blue, yellow, orange, orange, and green, respectively. The lower part of the square indicating these states is displayed as "NO" in case of emergency operation and "○" in case of rescue operation. The number 99 at the lower right of the display in FIG. 5A represents the current position (floor) of the elevator.

When a bank is represented by one, for example, FIG.
It is displayed as shown in (b). When displayed in this way, it indicates that all elevators in the A1 building are operating normally. The conditions for changing these displays are stored in the image information DB 106.

Next, searching and printing in the case where an abnormal state is displayed while looking at the composite screen displayed as described above will be described.

In one embodiment of the present invention shown in FIG.
A method of transmitting status change information from the monitoring equipment block 102 to the elevator equipment status display system 101 will be described with reference to FIG. 7. The TCP / IP protocol has become widespread due to the recent explosive spread of the Internet, and it is also often used in the case of performing communication by Ethernet. Since connection communication is performed, its reliability is also highly evaluated. When the TCP / IP protocol is used, when data is transmitted from the communication unit, the receiving side automatically transmits an ACK signal indicating the reception to the other party.
As a result, the transmission side can also detect that the data has been transmitted and received.

However, in the conventional system, TCP / IP is used.
In the above, the timing of automatically returning the ACK signal after receiving the data could be shortened to about 200 ms.

In this embodiment of the present invention, an ACK signal is sent to the transmitting side at an early stage by using echo back as shown in FIG. 7 (a). By doing so, in the conventional method of automatically returning the ACK signal, the time required for about 200 ms is about 14 to 20 ms, which is 10 times faster than the timing in this embodiment where the receiving side forcibly sends the echo back. Then, it becomes possible to return a signal to the transmitting side.

In the conventional TCP / IP ACK process, only the length of the received data is checked, and the signal is not necessarily the signal sent from the transmitting side. However, when echo back is performed as in this embodiment, the receiving side returns the same data as the data sent from the transmitting side to the transmitting side as ACK, so it can be confirmed that the signal is the same as the signal sent from the transmitting side. It will be possible. Therefore, in addition to the communication by the TCP / IP protocol having general versatility on the Ethernet, the communication can be performed more quickly and efficiently, and the reliability is improved.

By the way, an elevator installation has a great many states, and sending all of them causes a lot of traffic. In order to reduce the traffic on the Ethernet as much as possible, only the signal that has changed with respect to the state change of each elevator is transmitted. This allows
Even if all the information including the elevator status is not always sent, only the difference can be sent and received, and the traffic on the Ethernet can be reduced.

An example of the format of the signal transmitted in this case is shown in FIG. 7 (b). E indicates a data type, and 0 means data communication and 1 means echo back. K is model information, and B4 to B0 are bank numbers. A9 to A0 indicate addresses, and D7 to D0 indicate data. Further, T indicates a test type, where 0 means that the test is not performed, and 1 means that the test is performed. Furthermore R
Indicates a general control type in the building, 0 means inside the building, and 1 means centralized management.

The state change signal is composed of 5 bytes, and the first 1 byte is set to "0" at the 7th bit of the 1st byte and 1 is set to the 7th bit of the remaining 4 bytes. This allows the receiving side to easily divide the data into 5 bytes even if the signal of state change is connected in a string, and if the bits are misaligned, it is easy to know that a communication error has occurred. Can be identified.

In the system of one embodiment of the present invention,
The operation when searching and printing will be described with reference to FIG. When an event 601 such as control, failure, operation, etc. occurs, the history thereof is stored in the history database 603.
(Not shown in FIG. 1). Input the search conditions from the mouse / keyboard 111, and enter the monitoring display screen 60.
When the history button 605 is clicked in 4, the history display screen 606 is displayed. At this time, a history 608 satisfying the search condition 607 input from the mouse / keyboard 111 is output from the history DB 603 and displayed as a history. The initial value of this history is the current day, and if no special date is specified, the history of that day is displayed. After that, if you click the print button 609 with the mouse,
The displayed history is printed out. It should be noted that the system of one embodiment of the present invention must be continuously monitored for 24 hours. However, if the system goes down, the user can be immediately notified that the computer is down and the computer can be restarted. .

In general, this type of monitoring system has a great difference in specifications depending on the customer such as the number of elevators and escalators, model, building height, stop floor, number of banks, building lot area, etc. I need to respond. According to the system of the present invention, by symbolizing each monitored object, the following advantages occur. Standard symbols can be reused by changing parameters without modifying the program. When standard symbols are not available, only special symbols corresponding to the property can be prepared and combined with the standard symbols to easily meet customer demands. Furthermore, since the screen can be visually constructed when designing the system, the design is easy and the time required to complete the system can be shortened.

By the way, in the above-described embodiment, the elevator installation status display system 1 is changed from the monitoring installation block 102.
In 01, only the change in the state of each elevator was transmitted. However, in the present invention, not only the amount of change but also information indicating the state of the elevator can be constantly sent. Next, an embodiment of the present invention of this type will be described with reference to the drawings.

The TCP / IP protocol has become widespread due to the recent explosive spread of the Internet, and is often used in the case of communication by Ethernet. Since connection communication is performed, the reliability is also highly evaluated. However, when such a TCP / IP protocol is applied to the system shown in FIG. 1, the monitoring equipment block 102
Inside, high-frequency noise is generated from the elevator control unit 116. As a countermeasure against this noise, in this embodiment of the present invention, a signal indicating the state of the elevator is repeatedly transmitted in a relatively early period, and the receiving side compares the received signals to extract an accurate signal.

FIG. 8 shows a monitoring equipment block 102 and an elevator equipment status display system 101 in the case of this embodiment.
A flow of signal exchange between (hereinafter referred to as the display system 101) is shown. First, in the monitoring equipment block 102,
When the state of activation f2 or reconnection f1 is reached, a connection request f3 is transmitted to the display system 101.

On the other hand, the display system 101 starts up f11.
Alternatively, when it is in the reconnection f12 state, it waits for the reception of the connection request f3 in the connection waiting state f13. When receiving the connection request f3 from the monitoring equipment block 102, the display system 101 enters the state of connection acceptance f14.

Then, it is checked whether or not the monitoring equipment block 102 is registered in the display system 101, and if it is registered, the display system 101 sends a connection acceptance f14 to the monitoring equipment block 102.

As a result, the connection establishment f4 and f15 are established between the monitoring equipment block 102 and the display system 101, and communication becomes possible.

After the connection is established, the monitoring equipment block 102 and the display system 101 start increments f5 and f16, respectively. The increment is performed once every 15 seconds, and the value is incremented by 1 in the monitoring equipment block 102 and the display system 101, whereby it is possible to know whether the other party is operating normally.

Here, the packet structure of communication is shown in FIG.
Will be explained. As shown in the figure, the communication packet for transmitting the elevator status has a start code 1 byte (byte), a command code 1 byte, a test type 1 byte, a building number 1 byte, a bank number 1 byte, an increment 1 byte, It consists of a common map of 272 bytes, an end code of 1 byte, and a total of 279 bytes.

The above command code is synchronous (81
H), data communication elevator (82H), data communication escalator (83H), increment (84H), operation signal (85H), and resend (86H). Here, H indicates that the number before it is a hexadecimal number.

FIG. 10 shows the structure of a common map for inputting the elevator status. Since there are many elevators and many monitoring items for monitoring elevators, it is necessary to send a large amount of data in bit units. The common map has a bank as one unit, which is a group of a plurality of elevators. Since elevators normally exist in a plurality of banks in a building, a plurality of common maps as shown in FIG. 10 arrive from the monitoring equipment block 102 to the display system 101 side.

Returning to FIG. 8, since the display system 101 does not know the elevator state (elevator position, lamp, operation switch, etc.) immediately after starting after the above-described increment is started, it is necessary to adjust the state to the elevator side. . Therefore, the state of the monitoring block 102 is shown in FIG.
0 is recorded in the common map and the packet having the configuration shown in FIG. 9 is transmitted to the display system 101 side. FIG. 11 shows this state in detail.

In FIG. 11, the elevator control section 116.
A common map 801 is generated by a common map conversion 800 for converting the control signal of No. 1 into the form of the common map of FIG. In the monitoring equipment block 102, the synchronization 81H is set to the command code of the packet configuration shown in FIG. 9, and the synchronization signal f6 is transmitted as shown in FIG.

On the network, the synchronization signal 81Hf31
Data flows and arrives at the display system 101 side. In the display system 101, the communication unit 103 synchronously receives f
After that, the lamp signal and the operation signal are set by the contents of the received common map, the set contents are set as the synchronization confirmation transmission, 81Hf32 is set as the command code of the packet, and the packet is sent to the monitoring equipment block 102 side.

In the monitoring equipment block 102, the synchronization confirmation f7
Common map 8 sent for synchronization after receiving
Check if it matches the contents of 01. If the contents are different, the synchronization is monitoring equipment block 102.
And the display system 101 do not match, and when it is determined to be unsuccessful, the synchronization f6 is transmitted again from the monitoring equipment block 102. The number of failures is three.

Monitoring equipment block 102 for synchronization
When it is confirmed that the contents transmitted from the contents match the contents of the common map 801, it is determined that the synchronization has been successfully established, and the data communication is started. Data communication includes a flow from the monitoring equipment block 102 to the display system 101 and a flow from the display system 101 to the monitoring equipment block 102. Here, the flow from the state equipment block 102 to the display system 101 will be described.

In FIG. 8, from the data communication f8, the data communication (82H) f33 and f3 are added to the command code on the packet.
It shows that 4 is sequentially flowing. The detailed flow is shown in FIG. The control signal of the elevator control unit 116 is converted to the common map of FIG. 10 by the common map conversion 800, the data communication elevator (82H) is set to the command code of the packet configuration of FIG. 9, and the elevator equipment state is set from the monitoring equipment block side. Send to the display system side.

According to this method, after performing the synchronization processing, the status of the elevator control section 116 sequentially flows from the monitoring equipment block 102 side to the display system 101 side. Therefore, even if a packet is damaged due to the influence of noise, the next packet arrives. Therefore, the problem can be avoided if the elevator status display system can only determine that the packet is damaged.

The floor data will be described in detail. The monitoring equipment block 10 will be sequentially transmitted in the form of data communication (82H).
Data flows from 2. In the display system 101,
After receiving the data communication, the composite screen display unit 110 extracts the data to be displayed. Floor data is also included in this.

When the content of the data communication is floor data, the information content of the control signal of the elevator and the floor number of the building usually do not match. Therefore, in the specification information DB 106,
It is necessary to prepare a table for matching the elevator control signal with the floor number of the building to know the actual elevator position.

There are three normal movements of floor data. Since the data is sent in sequence, (1) floor data is the same as the previous floor data, (2) floor data is the previous floor data plus 1, (3) floor data is the previous floor There are three types of floor data, minus one.

If not, it can be determined that the floor data has been damaged. Therefore, in the elevator status display unit 105, if it is determined that the floor is damaged after performing the above determination processing, the floor data is discarded,
Wait for the next packet.

Although it rarely occurs, if the data is successively damaged by noise, the above condition may not be satisfied. In this case, when the floor data is damaged more than three times, a mechanism for believing the damaged contents and adjusting to the current floor is adopted.

Further, it is necessary to save the previous floor data, and when the above-mentioned condition is satisfied, the floor data is copied and used as the previous floor data. In addition, the composite screen display unit has a mechanism that can always display the contents of the previous floor data, and even if the communication is down, the state before the communication is down can be displayed on the screen.

Next, a communication method from the display system 101 side to the monitoring equipment block 102 side will be described. Figure 8
Then, from the operation signal transmission f21 to the operation signal (85H) f36
And 82H signal for data communication is sent to the monitoring equipment block 102. The detailed movement is shown in FIG.

It is necessary to pay sufficient attention to the influence of data corruption due to noise on the signal for operating the elevator, which is sent from the display system 101 to the monitoring equipment block 102. This is because when data is corrupted by noise, it creates a state in which the switch is turned on without permission, which may cause the elevator to malfunction and always requires a high degree of reliability.

Therefore, a communication method for always producing the same state on the monitoring equipment block 102 side and the display system 101 side will be described. Communication unit 1 of display system 101
03, the state of the display system 101 side is changed to the command code of the packet having the configuration shown in FIG.
H) is set and the monitoring equipment block 102 is set at regular intervals.
Always send.

In this way, the contents of the display system 101 are always sent to the monitoring equipment block 102 after the increment and synchronization processing, so that the display system 10
1 and the monitoring equipment block 102 have the advantage that they can always share the same state.

In the monitoring equipment block 102, a current control signal is taken out from the elevator control section 116 and converted into a common map 801 by common map conversion. And
Only the common map operation signal is extracted from the common map 801, and this signal is compared 806 with the operation signal of the common map flowing from the display system 101. If they are the same, nothing is done (807).

On the other hand, when it is determined that the two operation signals are different, the retransmission request transmission 808 sets retransmission (86H) to the command code of the packet configuration shown in FIG. 9 and sends it to the display system 101.

Immediately after receiving the resend request, the display system 101 sends out the state of the operation signal by the operation signal transmission 810.

Here, a method of transmitting the operation signal will be described. In the elevator control signal input unit 114 of the display system 101, a supervisor operates the elevator, so that the operation symbol displayed on the composite screen is turned on. ON in the elevator control signal input section 114
When the signal of 18 is input, a confirmation screen is displayed to confirm whether or not to actually operate. If you want to cancel the operation once instructed, select the cancel button on the screen. Then, it shifts to the state of cancel 816,
ON 818 returns the pressed button.

Originally, the control signal may be sent when the monitoring person can be confirmed on the confirmation screen. However, this instruction is a part that is operated by a human, and there is a risk that the confirmation button may be pressed by mistake. In consideration of the human interface, this system creates a waiting time of 1 second. By this, even if the watcher accidentally confirms with the confirmation button, if it is within 1 second,
The off 819 button can be used to cancel the transmission of the operation signal.

The operation signal of the elevator is usually 1
Since the control can be performed automatically by turning the switch on once, there is no control to turn the switch on and off quickly. This system is equipped with a mechanism that locks the switch so that button operation cannot be performed for each group of operation signals when an ON signal is output to the network by utilizing its characteristics. Therefore, even if the switch is accidentally turned on or off immediately thereafter, there is no possibility of malfunction, and the immediately previous operation signal is transmitted.

Thereafter, the operation signal enters the operation signal transmission 810, the operation signal (85H) is set in the command code of the packet configuration shown in FIG. 9, and the monitoring equipment block 10
2 is sent. At this time, assuming that the operation signal (85H) is broken due to noise, three packets are transmitted at, for example, one second intervals, and then the state of the elevator state display system is continuously transmitted by data communication (82H).

As a result, the monitoring equipment block 102 can recognize that the operation signal has been received at the moment when the operation signal (85H) can be received, and if the state of the operation signal of the next operation signal (85H) is the same, The elevator control unit 116 is instructed based on the signal.

If the operation signal (85
Even if H) is broken, the data of the next operation signal (85H) arrives, and it is possible to determine whether or not it is also broken. However, the operation signal (85H) packet is 3
Since it only arrives once, the first and second operation signals (85
If H) is damaged and the last operation signal (85H) arrives correctly, compare the data of the operation signal (85H) with the content of the operation signal of 82H of the next data communication, and if they are the same, operate Is determined, and the elevator control unit 116 is instructed based on the signal.

If all three operation signals (85H) are damaged, the operation contents of the display system 101 and the state of the monitoring equipment block 102 are destroyed. A resend request 808 is sent from the block 102 side. According to this, as a result, the operation signal is sent again from the display system 101, and the operation contents on the elevator monitoring status display system 101 side and the monitoring equipment block 102 side match.

By the way, the status signal is communicated from a plurality of status equipment blocks in the form of a common map.
As shown in FIG. 14, the communication unit 1 of the equipment condition monitoring system.
In 03, 1: 1 communication is performed between the common map transmission / reception program and a plurality of state equipment blocks. With such a configuration, since the common map transmission / reception program operates independently, even if a large load is generated in the elevator information display unit, the common map information can be input / output independently from the state equipment block side. In addition, even if by any chance a trouble occurs on the side of the state equipment block and communication is not possible from one location, only the state equipment block where the failure occurred while obtaining the common map information from other state equipment blocks It becomes possible to carry out recovery work.

As described above, according to this embodiment of the present invention, by adopting the method of repeatedly transmitting the same data, even if the high speed communication is performed, the data arriving next is efficiently processed. Therefore, even if the influence of noise appears, highly reliable communication becomes possible.

Further, by transmitting the timing at which the signal is input from the elevator status display system side to the monitoring equipment block side, the processing on the monitoring equipment block side is simplified.

Since the same data is always sent,
Unlike sending only changes, it has the advantage of being easy to debug when monitoring on the network. Therefore, if a trouble occurs in the communication between the monitoring equipment block and the elevator status display system, and if the trouble is related to the network, there is an advantage that quick response can be taken.

In the above embodiment, the case where the equipment is an elevator has been described. However, the present invention is not limited to an elevator, and can be applied to an escalator, a case where an elevator and an escalator are installed, and other vehicles installed in a specific place. Furthermore,
The present invention is not limited to vehicles to be installed, and is applicable to general operating equipment.

The present invention can also be implemented by a program realized by a computer.

[0092]

As described above, according to the present invention, it is possible to immediately know that a certain equipment is in an abnormal state and where the equipment is, or the current status of the equipment. There is an effect that the detailed state can be immediately known.

[Brief description of drawings]

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

FIG. 2 is a diagram for explaining how to place symbols to be arranged on a status display screen in the embodiment of the present invention.

FIG. 3 is a diagram for explaining associating a state detail screen and a database with a symbol displayed on a composition screen according to an embodiment of the present invention.

FIG. 4 is a diagram for explaining that symbols can be specified hierarchically in an embodiment of the present invention.

FIG. 5 is a diagram for explaining an example of the state of the elevator car and the state of the bank in the embodiment of the present invention.

FIG. 6 is a diagram for explaining a case where a condition is input from the monitoring state to search the past history and print the history according to the embodiment of the present invention.

FIG. 7 is a diagram illustrating a method of transmitting elevator state change information and a data format thereof according to the embodiment of the present invention.

FIG. 8 is a diagram for explaining a processing flow of another embodiment of the present invention in which an elevator status signal is sent from the monitoring equipment block by another method.

FIG. 9 is a diagram for explaining a packet configuration example of a transmission signal according to another embodiment of the present invention.

FIG. 10 is a diagram for explaining a configuration example of a common map in another embodiment of the present invention.

FIG. 11 is a diagram for explaining the flow of processing for establishing synchronization in another embodiment of the present invention.

FIG. 12 is a diagram for explaining data communication processing according to another embodiment of the present invention.

FIG. 13 shows data communication according to another embodiment of the present invention,
The figure for demonstrating the flow of the process of transmission / reception of an operation signal.

FIG. 14 is a diagram for explaining how to create a common map in another embodiment of the present invention.

[Explanation of symbols]

101 ... Elevator equipment status display system, 102
... Monitoring equipment block, 103, 117 ... Communication unit, 104 ... State change information, 105 ... Elevator information display unit, 106 ... Specification information DB, 107 ...
・ Building background display section, 108 ... Parts information DB, 109
... Image information DB, 110 ... Composite screen display unit, 1
12 ... Control signal information, 114 ... Elevator control signal input section, 116 ... Elevator control section, 603.
..History DB.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Kazuhisa Kanazawa             1F Toshiba Town, Fuchu City, Tokyo             Fuchu factory inside (72) Inventor Hiroki Nozu             1F Toshiba Town, Fuchu City, Tokyo             Fuchu factory inside F term (reference) 3F303 BA01 CB42 DB11 EA03 FA02                 3F304 BA26 EA22 ED01 ED06 ED11                       ED16

Claims (16)

[Claims] 1. A means for displaying a symbol indicating the facility at a place where a specific facility is installed on a map displayed on a screen, and a device for displaying the symbol corresponding to the symbol displayed by this means. An equipment status display system comprising: means for associating a screen showing a detailed status; and means for storing a condition for changing the display of the corresponding symbol depending on the status of the equipment. 2. A means for displaying a symbol representing the facility at a place where a specific facility is installed on a map displayed on a screen, and a facility corresponding to the symbol displayed by the means. Means for associating a screen showing a detailed state, means for storing a condition for changing the display of the corresponding symbol due to a change in the state of the equipment, and details of the equipment corresponding to the symbol by specifying the symbol A system for displaying the status of equipment, which comprises: 3. A means for displaying a symbol representing the facility at a place where a specific facility is installed on a map displayed on the screen, and a device for displaying the symbol corresponding to the symbol displayed by this means. Means for associating a screen showing a detailed state, means for storing a condition for changing the display of the corresponding symbol due to a change in the state of the equipment, and equipment corresponding to the symbol satisfying the conditions stored in the database And a means for changing the display of the symbol corresponding to the time when the equipment status display system is provided. 4. A means for displaying a symbol representing a specific elevator facility at a place where a specific elevator facility is installed on a map displayed on a screen, and the elevator corresponding to the symbol displayed by this unit. Means for associating a screen showing a detailed state of equipment, means for storing a condition for changing the display of the corresponding symbol due to a change in the state of the elevator equipment, and corresponding to this symbol by specifying the symbol And a means for displaying a detailed status of the elevator equipment, the equipment status display system. 5. A means for displaying a symbol representing a specific elevator facility at a place where a specific elevator facility is installed on a map displayed on a screen, and the elevator corresponding to the symbol displayed by this unit. Means for associating a screen showing a detailed state of the equipment, condition storage means for storing a condition for changing the display of the corresponding symbol due to a change in the state of the elevator equipment, and the elevator equipment corresponding to the symbol is the condition storage Means for changing the display of the corresponding symbol when the condition stored in the means is satisfied, and a system for displaying the state of equipment. 6. A function of displaying, on a map displayed on a screen of a computer, a symbol representing the facility at a place where the specific facility is installed, and a function corresponding to the symbol displayed by this function. For displaying the state of the facility, which realizes a function of associating a screen showing a detailed state of the facility and a function of storing a condition for changing the display of the corresponding symbol according to the change of the state of the facility. Program of. 7. A function of displaying, on a map displayed on a screen of a computer, a symbol indicating the facility at a location where a specific elevator facility is installed, and corresponding to the symbol displayed by this function. The function of associating a screen showing the detailed state of the elevator installation, the function of storing the condition for changing the display of the corresponding symbol due to the change of the state of the elevator installation, and the symbol by specifying the symbol A program for displaying the status of equipment, which realizes a function of displaying the detailed status of elevator equipment corresponding to. 8. A function of displaying, on a map displayed on a screen of a computer, a symbol representing the facility at a place where a specific elevator facility is installed, and corresponding to the symbol displayed by this function. A function for associating a screen showing a detailed state of the elevator installation, a condition storage function for storing a condition for changing the display of the symbol according to a change in the state of the elevator installation, and an elevator installation corresponding to the symbol is the condition A program for displaying the state of equipment, which has a function of changing the display of the corresponding symbol when the condition stored in the storage function is satisfied. 9. A step of displaying a symbol representing the facility at a place where a specific facility is installed on a map displayed on a screen, and a step of displaying the symbol corresponding to the symbol displayed by this means. In a state display method of equipment, comprising a step of associating a detailed screen showing a detailed state and a condition storing step of storing a condition for changing the display of the symbol, the condition stored in the condition storing means is satisfied. Sometimes, a step of changing the display of the symbol, and a step of displaying the detailed screen of the facility corresponding to the identified symbol when the symbol is identified, the facility of Status display method. 10. A monitoring equipment block having an equipment control unit for controlling equipment to be monitored and transmitting a status signal indicating the status of the equipment, and receiving the status signal transmitted from the monitoring equipment block, A facility status monitoring system comprising a facility status display system for displaying the status of the facility and transmitting a control signal for the facility to the monitoring facility block, wherein the facility status display system is on a map displayed on a screen, Means for displaying a symbol representing the equipment at the location where the specific equipment is installed, means for associating the symbol displayed by this means with a screen showing the detailed state of the corresponding previous term equipment, and the equipment A means for storing a condition for changing the display of the corresponding symbol due to a change in the state, and this symbol by specifying the symbol. Equipment status monitoring control, which comprises means for displaying a detailed status of the equipment corresponding to the equipment and means for transmitting an operation signal for operating the equipment in the equipment control block to the monitoring equipment block. system. 11. A monitoring equipment block having an equipment control unit for controlling equipment to be monitored and transmitting a status signal indicating the status of the equipment, and receiving the status signal transmitted from the monitoring equipment block to receive the status signal. A facility status monitoring system comprising a facility status display system for displaying the status of the facility and transmitting a control signal for the facility to the monitoring facility block, wherein a plurality of the monitoring facility blocks have a common map in which control information is unified. Equipment condition monitoring control, comprising means for converting and a common map transmission / reception program in which the elevator equipment condition monitoring system has a one-to-one correspondence with the plurality of monitoring equipment blocks, and means for transmitting / receiving the common map. system. 12. A monitoring equipment block having an equipment control unit for controlling equipment to be monitored and transmitting a status signal indicating the status of the equipment, and receiving the status signal transmitted from the monitoring equipment block and receiving the status signal. In a facility condition monitoring and control system comprising a facility condition display system for displaying a condition of a facility and transmitting a control signal for the facility to the monitoring facility block, the monitoring facility block has a condition corresponding to each facility and has the monitoring facility block. The equipment-side common map and the monitoring-side common map that the equipment state display system has by detecting the states corresponding to the respective equipment, so that they always match, between the monitoring equipment block and the equipment state display system. An equipment condition monitoring and control system characterized by communication. 13. A monitoring equipment block having an equipment control unit for controlling equipment to be monitored and transmitting a status signal indicating the status of the equipment, and receiving the status signal transmitted from the monitoring equipment block and receiving the status signal. In a facility status monitoring and control system comprising a facility status display system that displays the status of the facility and transmits a control signal for the facility to the monitoring facility block, the monitoring facility block is a facility-side common map corresponding to the status of each facility. The monitoring equipment block has a means for transmitting a synchronization signal including the means for holding the transmitted contents, and the equipment status display system side has a control signal from the monitoring equipment block side in the common map to the equipment status system side. , Common map of control signals of operation signals from the equipment status display system side to the monitoring equipment block side to the equipment status display system side Means to set, means to send the contents of the common map set on the equipment status display system side to the monitoring equipment block side, and contents of the common map sent from the equipment status display system side on the monitoring equipment block side And a means for comparing the common maps held therein and, if they are the same, determining that synchronization has been achieved, and a means for comparing if the same is not the same, determining that synchronization has not been established, and means for transmitting a synchronization signal again An equipment condition monitoring and control system comprising: 14. A monitoring equipment block having an equipment control unit for controlling equipment to be monitored and transmitting a status signal indicating the status of the equipment, and receiving the status signal transmitted from this monitoring equipment block, A facility status monitoring system comprising a facility status display system for displaying the status of the facility and transmitting a control signal for the facility to the monitoring facility block, wherein the facility status display system is on a map displayed on a screen, Symbol display means for displaying a symbol representing the facility at a place where the specific facility is installed, and operation signal transmitting means for transmitting an operation signal for operating the facility displayed by the symbol display means to the monitoring facility block. And, the state of the equipment state display system is always put on the common map from the equipment state display system at a constant timing. The means for sending to the monitoring equipment block, the means for comparing the operation signal content of the common map received on the monitoring equipment block side with the content of the operation signal of the common map showing the control status on the monitoring equipment block side, and the above comparison If it is detected that there is a difference, the means to send the resend signal including the common map from the monitoring equipment block side to the equipment status display system side, and the equipment status display system side displays the current equipment status when the resend signal is received. Put the contents of the system operation signal on the common map, and send it as an operation signal to the monitoring equipment block side several times at regular intervals, and the monitoring equipment block side receives the common map that received the operation signal and the next operation signal. Compared with the common map at the time, if they are the same, set the operation signal part of the common map that is the control signal of the monitoring equipment block. An equipment condition monitoring and control system comprising a step. 15. A monitoring equipment block having an equipment control unit for controlling the equipment to be monitored and transmitting a status signal indicating the status of the equipment, and receiving the status signal transmitted from this monitoring equipment block and receiving the status signal. A facility status monitoring system comprising a facility status display system for displaying the status of the facility and transmitting a control signal for the facility to the monitoring facility block, wherein the facility status display system is on a map displayed on a screen, Symbol display means for displaying a symbol representing the equipment at a place where the specific equipment is installed, and operation signal transmission for repeatedly transmitting an operation signal for operating the equipment displayed by the symbol display means to the monitoring equipment block. Means for displaying the status of the equipment status display system from the equipment status display system at a constant timing. The contents of the operation signal of the equipment status display system are placed on the common map at the timing when the operation signal is input and the means for sending it to the monitoring equipment block. On the monitoring equipment block side, the sending means and the common map that received the operation signal are compared with the common map when the next operation signal is received. If they are the same, the common map that is the control signal of the monitoring equipment block is compared. An equipment condition monitoring and control system comprising means for setting the operation signal portion. 16. A monitoring equipment block having an equipment control unit for controlling the equipment to be monitored and transmitting a status signal indicating the status of the equipment, and receiving the status signal transmitted from the monitoring equipment block and receiving the status signal. A facility status monitoring system comprising a facility status display system for displaying the status of the facility and transmitting a control signal for the facility to the monitoring facility block, wherein the facility status display system is on a map displayed on a screen, Symbol display means for displaying a symbol representing the equipment at a place where the specific equipment is installed, operation input means for inputting an operation signal for operating the equipment displayed by the symbol display means, and this operation input means And an operation signal transmitting means for repeatedly transmitting the operation signal input by the control unit to the monitoring equipment block after a predetermined time. When a signal to cancel the input operation is input by the operation input means before transmission of the operation signal by means,
An operation signal transmission canceling means for canceling the transmission of the operation signal, and a means for sending the status of the equipment status display system on the common map at a constant timing from the equipment status display system to the monitoring equipment block, and an operation signal. At the input timing, the contents of the operation signal of the equipment status display system are put on the common map, and the operation signal is sent to the monitoring equipment block side several times at a constant interval as the operation signal and the operation signal is received on the monitoring equipment block side. The common map and the common map when the next operation signal is received are compared, and if they are the same, a means for setting the operation signal portion of the common map, which is the control signal of the monitoring equipment block, is provided. Equipment condition monitoring control system.