JPS6113303A - Controlling system of building - Google Patents

Abstract

PURPOSE:To flexibly deal with changes in a system by simply changing the content of the arithmetic section at every terminal, by automatically adjusting the control of each apparatus by means of the terminals equipped with the arithmetic sections. CONSTITUTION:When a scan controlling section 45 scans facility instruments under its control and stores information regarding their states and measurement (on/off, open/close, and measured values) and alarm information in a standard buffer 42 at a terminal 4, an arithmetic section 43 finds the state and measurement information and alarm information of each group from these information and stores the found results in an expansion buffer 44. When a host computer 3 sends a control command to group composed of plural facility instruments to the terminal 4, a transmission controlling section 41 stores the command in the expansion buffer 44 and the arithmetic section 43 implements control commands to each facility instrument and stores them in the standard buffer 42 at the terminal 4. When the control commands to each facility instrument are stored in the standard buffer 42, the scan controlling section 45 controls corresponding facility instruments in accordance with the control commands.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a building management system, and in particular, the present invention relates to a building management system, and in particular, air conditioning equipment and lighting equipment that are not under control of a remote terminal, either individually or in a group, from a host computer through a remote terminal. The present invention relates to a building management system that can monitor and control equipment such as buildings.

[Conventional technology]

FIG. 1 is a diagram showing a general configuration example of a building management system. In FIG. 1, 1 is a display device, 2 is a printer device, 3 is a host computer, 4-1 and 4-2 are terminals (R5; Remote 5tation), and 5-1 and 5-2 are equipment groups, respectively. ing.

The display device 1 has a keyboard and a light pen, and performs key input or light pen input to the host computer 3, and displays the status of each equipment, alarm messages, and other information.

Host calculation 4! ! 3 imports status/measurement information such as the operating status and measured values of the equipment group 5-1.5-2 from each terminal 4-1.4-2 according to key (light pen) input and instructions from the control program. performs arithmetic processing such as various calculations and judgments, sends control commands to each terminal 4-1, 4-2, and sends status/measurement information, alarm messages, and other information as necessary. The display device 1 and the printer device 2 output data. For example, when measuring temperature and controlling the opening of an air conditioner's valve according to the measured value, a request is sent to a terminal through a transmission line, the measured value (status/measurement information) is fetched, and the status/measurement information is sent to the terminal. When it receives the measurement information, it generates a control command to control the opening of the valve based on the state and measurement information and sends it to the terminal.

The terminal 4-1.4-2 controls the equipment group 5-1.5-2 under control according to control commands from the host computer 3, turns on/off the equipment group 5-1.5-2, etc. It is used to send status/measurement information such as measured values to the host computer 3. For example, the terminals 4-1 and 4-2 scan the equipment under each device and check their status and measurement information such as on/off status, measured values, and alarm information such as trips and failures.
The control command is stored in the sofa and sent out according to a request from the host computer 3, and the control command transmitted from the host computer 3 is stored in a buffer, and the equipment is controlled according to this control command.

Equipment group 5-1.5-2 includes fans, refrigerators,
There are air conditioners, lighting equipment, and other control equipment and measuring instruments.

[Problem that the invention seeks to solve]

As mentioned above, the conventional building management system consists of equipment group 5.
- Since all the monitoring and control information in 1.5-2 was imported into the host computer 3 and processed, the load on the host computer 3 increased rapidly as the system grew, resulting in a decrease in system efficiency as a whole. is inviting. In addition, if the configuration of the equipment group 5-1.5-2 under the terminal 4-1.4-2 changes or if the number of terminals increases or decreases,
Each time, the arithmetic processing program of the host computer 83 and the related data section must be completely changed, which poses a problem in that it is difficult to respond flexibly to changes in the system.

[Purpose of the invention]

The present invention is based on the above considerations, and aims to provide a building management system that can reduce the burden on host computers, make them more versatile, and flexibly respond to changes in the system. It is something.

[Means for solving problems]

FIG. 2 is a diagram showing the configuration of one embodiment of a terminal to which the present invention is applied, FIG. 3 is a diagram illustrating an expansion buffer of a terminal to which the present invention is applied, and FIG. 4 is a diagram showing a terminal to which the present invention is applied. FIG. 2 is a diagram illustrating the configuration of a calculation unit of FIG.

In the figure, 4 is a terminal, 5 is a group of equipment, 41 is a transmission control section, 42 is a standard buffer, 43 is an arithmetic section, 44 is an extended buffer, and 45 is a scan control section.

In FIG. 2, the standard buffer 42 stores status/measurement information such as on/off and measured values of each of the subordinate equipment group 5, alarm information such as trips and failures, and control commands. The scan control unit 45 scans the equipment group 5 under its control and stores the status/measurement information and alarm information of the equipment in the standard buffer 42 .
The equipment group 5 is controlled in accordance with control commands stored in the equipment 2. The expansion buffer 44 is as shown in FIG.
, TG005, TGOO6, PGOOI, etc., for each group (I[l; identifier unit), status/measurement information such as on/off, measured values, alarm information, and control commands are stored. As shown in FIG. 4, in the calculation unit 43, control algorithms for each related equipment are specified in advance for each group (10; identifier unit) based on calculation formulas and control commands for obtaining status/measurement information. According to this specified content, the status of each equipment and device stored in the standard buffer 42
The state/measurement information for each group is obtained from the measurement information and stored in the expansion buffer 44.
It generates control commands for each piece of equipment from the control commands stored in the standard buffer 42 and stores them in the standard buffer 42. The transmission control unit 41 transmits the status and measurement information of each equipment stored in the standard buffer 42 and the expansion buffer 4 in accordance with a transfer request from the host computer 3, for example, a polling request.
It selectively sends the status/measurement information, etc. of each group stored in the host computer 4 to the host computer IA3, and when control commands for each equipment are sent from the host computer 3, they are stored in the standard buffer 42. However, when a group control command is sent, it is stored in the expansion buffer 44. Here, the standard buffer 42 and the extended buffer 44 are secured in physically continuous areas, and the transmission control unit 41 stores information in each without being aware of their division.

[Effect]

Next, the overall flow of monitoring and control in the building management system of the present invention will be explained.

First, in the terminal 4, when the scan control unit 45 scans the equipment under its control and stores each status/measurement information (on/off, open/close, measured value) and alarm information in the standard buffer 42, these From the information, the calculation unit 43 obtains status/measurement information and alarm information for each group, and stores this in the expansion buffer 44. On the other hand, the host computer 3
The address (or 10. i-printer) specified for terminal 4 can be used for each group in the same way as for individual equipment without having to be aware of whether to use the address for each individual equipment or the address for each group. Perform processing.

When the host computer 3 issues a status/measurement information transfer request to the terminal 4 specifying the group, the transmission control unit 41 of the terminal 4 selects the status/measurement information of the specified group and transfers the status/measurement information. is sent to the host computer 3. In addition, when the host computer 3 issues a request to transfer status/measurement information to the terminal 4 by specifying individual equipment, the terminal 4
Then, the transmission control unit 41 selects the status/measurement information of the specified individual equipment and sends it to the host computer 3. Then, when the host computer 3 sends a control command for a group consisting of a plurality of equipment to the terminal 4, the transmission control unit 41 stores it in the expansion buffer 44, and the calculation unit 43 controls the equipment for each equipment. A command is generated and stored in the standard buffer 42. When control commands for each piece of equipment are stored in the standard buffer 42, the scan control unit 45 controls the corresponding equipment according to this control command.

Furthermore, when the host computer 3 individually sends control commands for each equipment to the terminal 4, the transmission control unit 4
1 stores this in the standard buffer 42, and the scan control unit 45 controls the corresponding equipment.

Note that the calculation unit 43 generates control commands for each equipment and controls the corresponding equipment, and depending on the equipment, the scan control unit 45 scans the standard buffer 4.
Based on the status/measurement information stored in 2, for example, a control command is generated by comparing it with a preset target value (operation reference value), and the corresponding equipment is controlled according to this control command. It is possible to modify it as appropriate.

〔Example〕

FIG. 5 is a diagram illustrating one embodiment of an air conditioning system to which the present invention is applied. In Fig. 5, 51 to 54 are rooms, 55 and 56 are air conditioners, 57 and 60 are cold water valves, and 58
．． 59. 61 and 62 are steam valves, 63 to 68 are dampers, 69 and 70 are cooling towers, 71 is a cooling water pump, 72
and 73 are refrigerators, 74 to 77 are cold water pumps, and 78 is a boiler, respectively.

In the air conditioning system as shown in FIG. 5, cooling is performed by opening and closing cold water valves 57 and 60, heating is by opening and closing steam valves 58 and 61, and dehumidification is by opening and closing cold water valves 57 and steam valves 58, cold water valves 60 and steam valves 61, Steam valve 59 for humidification
The opening/closing of dampers 63 to 62, the cooling of outside air, and the cleanliness (CO2 concentration) are performed by controlling the opening/closing of dampers 63 to 68, respectively. When such air conditioning system equipment is placed under a terminal and monitored and controlled from a centrally located host computer, the fans of the air conditioner 55, 56, the cooling water pump 71, the refrigerator 72, 73, and the cold water pump 74 or 77, operating status of boiler 78 (on/off)
, cold water valve 57.60, steam valve 5 translation 59.61.
62 dampers 63 to 68 opening degree, indoor air temperature, humidity and cleanliness, outdoor air temperature and humidity, water tank temperature, refrigerator 72.
730 inlet temperature and outlet temperature, flow rate of each flow path, trip,
Check for malfunctions by scanning from the terminal. Then, the fans of the air conditioners 55 and 56, the cold river water pump 71, and the refrigerator 72.
73. Starting cold water pumps 74 to 77 and boiler 78/
Stop, cold water valve 57.60, steam valve 58.59.
61.62 Controls the opening degree of the dampers 63 to 68. At that time, the calculation unit of the terminal to which the present invention is applied may, for example, calculate the water temperature in the water tank by averaging a plurality of measured values, or calculate the temporal average value of the inlet temperature and outlet temperature when the refrigerator is on. Furthermore, you can calculate the calories of a refrigerator from the temperature difference between the inlet and outlet and the flow rate, and integrate (add) the number of on/off times and operating time of the equipment (inspection, maintenance, parts replacement, etc.) ), find the sum of the flow rate of each system, find the indoor air enthalpy and outdoor air enthalpy, or take the logical sum of systems connected in parallel.
(Used to determine whether the system is in operation or not).

On the other hand, in the generation of control commands, for example, when there is a command to start a refrigerator, the cooling water pump, the cold water pump, and the refrigerator are started in this order, and there is a delay between the startup of each device so as not to put stress on the equipment. For example, multiple devices can be linked together to set a certain startup time interval, such as at regular intervals, and when there is a command to start the air conditioner supply fan, the return fan can also be started automatically at the same time. In this way, devices that need to be linked are turned on and off at the same time. In addition, when averaging the measured values of multiple measurement points, however, F1 to F are the device operation flags (1,0) K1-
, the weight coefficient T I""' T q is a measured value, for example, water temperature, which is multiplied by a weight corresponding to each measurement point, and the valve that supplies water to the measurement point is open (operation flag Calculate the average value only for those for which the value is 1). This is a calculation that multiplies the state value and the measured value, and is used to exclude the temperature of unused rooms from the calculation even when taking the average temperature of the room.

When monitoring by taking the logical sum of a system in which multiple pumps are connected in parallel, for example, in a system in which multiple pumps are connected in parallel, if at least one pump is in operation, it is controlled and the flow rate is detected. There is control to increase the number of pumps in operation as the flow rate increases.

Alternatively, the measured values of gas, water, etc. may be totaled and sent as a daily report from the terminal to the center.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, a terminal equipped with an arithmetic unit can calculate the monitoring control data for each arbitrary group of equipment under the terminal and send it to the host computer. In addition, in response to control commands specified by a group from the host computer, it is now possible to convert the control commands into interlocked control and sequence control contents at the terminal, and automatically match the control of each device. It is possible to flexibly respond to changes in the system by simply changing the contents of the calculation section. Furthermore, since processing is distributed across each terminal, even if equipment groups have different specifications and performance, it is possible to simplify the system and reduce the burden on the central system, making it possible to scale up the system. can.

[Brief explanation of drawings]

Figure 1 is a diagram showing a general configuration example of a building management system.
FIG. 2 is a diagram showing the configuration of one embodiment of a terminal to which the present invention is applied, FIG. 3 is a diagram illustrating an expansion buffer of a terminal to which the present invention is applied, and FIG. 4 is a diagram showing a terminal to which the present invention is applied. FIG. 5 is a diagram illustrating an embodiment of an air conditioning system to which the present invention is applied. 1... Display device, 2... Printer device, 3
...Host computer, 4.4-1 and 4-2...Terminal (
Its;Remote 5tation),,5.
5-1 and 5-2 - equipment group, 41... transmission control unit, 42... standard buffer, 43... calculation unit, 44
...Expansion buffer, 45...Scan control unit, 51
or 54...room, 55 and 56...air conditioner, 57
and 60...cold water valve, 58.59.61 and 62...
・Steam valves, 63 to 68...Dampers, 69 and 7
0...Cooling tower, 71...Cooling water pump, 72 and 73
... Refrigerator, 74 to 77 ... Cold water pump, 78
···boiler. -'lll'3 Illustration material 4 Flash

Claims (1)

[Claims] In a building management system that monitors and controls equipment such as air conditioning equipment and lighting equipment from a central host computer through a terminal that has equipment under its control, the terminal monitors and controls the status, measured values, and control commands of each equipment under its control. A buffer for individual information registration that stores monitoring and control information such as equipment status, measured values, control commands, etc. for each group of equipment, and a buffer for group information registration that stores monitoring and control information such as control commands, etc., and each equipment according to prespecified calculation contents. It is equipped with a calculation means for calculating control commands from the equipment status and measured values, or for determining the status and measured values of equipment in groups, and for determining control commands for each equipment from control commands in group units. Or a building management system characterized in that it is configured such that equipment can be monitored and controlled by any unit of the group.