JP2823710B2 - Building management system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a building management system capable of performing alarm processing, special processing at the time of fire / power failure, and the like at high speed.

[0002]

2. Description of the Related Art FIG. 3 is a block diagram showing a conventional building management system disclosed in, for example, JP-A-61-13399. In the figure, reference numeral 1 denotes equipment such as air-conditioning equipment and lighting equipment, and reference numeral 2 denotes a plurality of terminal devices, each of which has the equipment 1 under its control.

[0003] Reference numeral 3 denotes a central processing unit which transmits control information and monitoring information to and from each terminal device 2 disposed in the center by a polling method and monitors and controls each equipment 1 through each terminal device 2. It is a host computer.

[0004] A display device 4 is connected to the host computer 3 and has input means such as a keyboard and a light pen. A printer device 5 is connected to the host computer 3. Reference numeral 6 denotes a transmission line connecting the terminal devices 2 and the host computer 3 to each other.

Next, the operation will be described. Here, FIG.
FIG. 4 is an explanatory diagram showing the polling method.

The host computer 3 checks the presence or absence of an alarm message from the terminal device 2 by checking polling 1.
1 to the terminal device 2. When the terminal device 2 has an alarm message to be transmitted, the terminal device 2 responds to the check polling 11 and acknowledges the presence of the alarm message 12
Is returned to the host computer 3.

When the host computer 3 receives the acknowledgment 12, it issues an alarm message request 1 to the terminal device 2.
3 to take in the alarm message 14 from the terminal device 2 concerned. Thereafter, the host computer 3 sends out a status message request 15 and the terminal device 2 sends the status message 1
6 is taken.

The terminal device 2 having received the check polling 11 returns a negative acknowledgment 17 to the host computer 3 if there is no alarm message to be transmitted. Upon receiving the negative acknowledgment 17, the host computer 3 sends a status message request 15 to the terminal device 2 to fetch the status message 16.

[0009]

Since the conventional building management system is configured as described above, whether or not each terminal device 2 has an alarm message is checked by polling from the host computer 3. In addition to the need for unnecessary polling only for checking, the polling message from the host computer 3 to the terminal device 2 is only for requesting a response from the terminal device 2. There is a problem that a message such as control information cannot be transmitted to a computer.

The present invention has been made in order to solve the above problems, and can perform important processing such as alarm processing, special processing at the time of fire / power failure, and the like quickly, with minimum polling. An object of the present invention is to obtain a building management system capable of transmitting all messages between a terminal device and a central processing unit.

[0011]

A building management system according to the present invention assigns a predetermined priority to a state change of equipment and divides a state change message for notifying a state change into each priority. The state change message is stored in the terminal device, and the state change message having a higher priority is transmitted to the central processing unit with priority. The central processing unit processes the received state change message according to the priority.

[0012]

The terminal device according to the present invention accumulates state change messages for each predetermined state given to each state change of the equipment and stores the state change messages to the central processing unit. The central processing unit processes the status change message received from the terminal device by giving priority to the one with the higher priority, so that the central processing unit processes alarm processing, special processing at the time of a fire / power failure, and the like quickly. And a building management system capable of transmitting all messages between the terminal device and the central processing unit with minimum polling.

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. In FIG. 1, reference numeral 1 denotes facility equipment, 4 denotes a display device, 5 denotes a printer device, and 6 denotes a transmission line, which are the same as or equivalent to those in the related art denoted by the same reference numerals in FIG. Omitted.

Reference numeral 7 denotes a state change message stored for each given priority given to each state change (including an alarm) of the equipment 1, and a state change message having a higher priority is given priority. The terminal device is different from the terminal device denoted by reference numeral 2 in FIG.

Reference numeral 8 denotes a state change message received from the terminal device 7, which is processed by giving priority to the higher priority one. It is a host computer.

In the terminal device 7, reference numeral 71 denotes a scanning control unit for interfacing with each equipment 1, and reference numeral 72 denotes a transmission control unit for interfacing with the transmission line 6.

Reference numeral 73 denotes a priority buffer for storing a state change message of the equipment 1 corresponding to a state change given a high priority, and 74 stores another state change message having a low priority. Is a non-priority buffer. A general information buffer 75 stores general information such as measurement data collected periodically.

Reference numeral 76 denotes a message sent from the host computer 8,
A system status processing unit for processing a system status such as a fire / power failure, and a general control information processing unit 77 for processing other general control information sent from the host computer 8.

In the host computer 8, an input / output control unit 81 interfaces with the display device and the printer device 5, and a transmission control unit 82 interfaces with the transmission line 6.

Reference numeral 83 denotes a priority processing unit for processing a high-priority one of the state change messages sent from the terminal device 7, and reference numeral 84 denotes a non-priority processing unit for processing a low-priority one. . Reference numeral 85 denotes a general information processing unit that processes general information from the terminal device 7.

Reference numeral 86 denotes a system status buffer for storing the system status at the time of a fire / power failure to the terminal device 7, and reference numeral 87 denotes general control information for storing other general control information to be sent to the terminal device 7.

Next, the operation will be described. The display device 4 is provided with input means such as a keyboard and a light pen. Using these, the key input and the light pen input to the host computer 8 are performed, and a state change including an alarm of each equipment 1 is further performed. Performs display output of general information such as measurement data.

The host computer 8 fetches information from each terminal device 7 in accordance with a key input or an instruction of a control program, sends a system status or general control information to each terminal device 7, The system status and general information are output to the display device 4 and the printer device 5 in accordance with.

In accordance with an instruction from the host computer 8, the terminal device 7 controls each subordinate equipment 1,
And sends general information such as ON / OFF and measured values to the host computer 8.

Here, when a state change occurs in any of the equipments 1, information indicating the state change is sent to the scanning control unit 71 of the terminal device 2 having the equipment 1 under its control. Therefore, the terminal device 2 performs a priority / non-priority distinction for each of the equipments 1, and information on a state change given from a high priority such as a failure of an important equipment is stored in the priority buffer 7.
The information on the other state changes is stored separately in the non-priority buffer 75. General information such as an analog measurement value obtained by the measurement is stored in the general information buffer 75.

On the other hand, the host computer 8 accumulates system status such as a fire power outage in a system status buffer 86, and stores general control information input from the display device 4 via the input / output control unit 81 in a general control information buffer 87. accumulate.

FIG. 2 is an explanatory diagram showing a polling method according to the present invention. Now, when the transmission control unit 82 of the host computer 8 polls the terminal device 7,
First, the system status transmission 21 based on the contents of the system status buffer 86 is performed.

The terminal device 7 that has received the system status transmission 21 sends the priority buffer 73 and the non-priority buffer 7
4, the contents of the priority buffer 73 are taken out with priority, and the contents are taken out and sent to the host computer 8 as the state change message 22. At this time, it is checked whether or not the general information is stored therein by referring to the general information buffer 75. If there is general information, the state change message is added with a data presence identification flag and transmitted. .

When the host computer 8 receives the status change message at the transmission control member 82, the host computer 8 or the non-priority processing unit 84 or 84 according to the priority given to it.
Separately store. The priority processing unit 83 or the non-priority processing unit 84 decodes the received state change message, sends it to the input / output control unit 81, and performs necessary processing such as display on the display device 4. Also in this case, the processing of the priority processing section 83 is executed prior to the processing of the non-priority processing section 84.

On the other hand, the transmission control unit 82 of the host computer 8
Determines whether or not the terminal device 7 has the general information to be transmitted by referring to the identification flag added to the state change message 22 and further transmits to the own general control information buffer 87. It is determined whether there is general control information to be provided. As a result, if either one is present, the general control information 23 is transmitted to the terminal device 7.

The terminal device sends the received general control information to the general control information processing unit 77 to perform necessary processing.
The data stored in the general information buffer 45 is sent to the host computer 8 as the general information 24.

As described above, by separately transmitting the system status and the general control information and the state change message and the general information, the transfer of each information is secured, and the identification flag is added to the response to the host computer. Is added to indicate whether there is general information to be transmitted to the terminal device side, thereby eliminating unnecessary polling and its response.

[0033]

As described above, according to the present invention, a status change message for notifying a status change of facility equipment is stored in a terminal device for each priority given to the status change. Since the state change message having a higher priority is transmitted to the central processing unit with priority, and the received state change message is processed according to the priority order, the central processing unit is configured to perform alarm processing, fire /
A building management system that can quickly perform important processing such as special processing at the time of a power failure and that can transmit all messages between the terminal device and the central processing unit with minimum polling is obtained. Has the effect.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a building management system according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing the polling method.

FIG. 3 is a block diagram showing a conventional building management system.

FIG. 4 is an explanatory diagram showing the polling method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Facility equipment 6 Transmission line 7 Terminal device 8 Host computer (central processing unit)

Claims (1)

(57) [Claims] And transmitting control information and monitoring information between a plurality of terminal devices under the control of equipment such as air conditioning equipment and lighting equipment, and a central processing unit arranged at the center. In a building management system that monitors and controls the equipment through a plurality of terminal devices from a processing device, a predetermined priority is given according to each state change of the equipment, and the terminal device has a priority or a priority for each equipment.
Perform non-prioritized sorting, and determine if failure of important equipment
The status change information given from the priority
Buffer, and other status change information is non-priority.
Buffer and accumulates the
Prioritize transmission of state change messages to the central processing unit
The central processing unit changes the system status to a system status.
System status buffer and general control information
The information is stored in the control information buffer and
When performing ringing, the system status buffer
By sending the system status based on the
Prioritize the contents of the priority buffer for the equipment
And send it as a state change message
First, refer to the general control information buffer, and
Check whether general information is stored, and
If there is information, identify the presence of data in the status change message
A flag is added and transmitted, and the status received from the terminal
The processing of the state change message is performed according to the higher priority.
A building management system characterized by being executed with priority .