JPH0580895A - Power source disconnecting system for terminal equipment - Google Patents

Abstract

PURPOSE:To provide a power source disconnecting system in which no connection/disconnection of power source by the power source switch of a terminal equipment simplex is performed and the execution of the disconnection of power source is controlled by a center system in a facility control system consisting of terminal equipment and the center system. CONSTITUTION:A power source disconnection request message from arbitrary terminal equipment 20 is collated with a corresponding power source disconnection condition from the table of a memory device 101 by a collating means 102 in the center system 10, and the permission/prohibition of the disconnection of power source is decided. A message return means 103 generates the message of permission or prohibition of power source disconnection, and returns it to the terminal equipment 20. The terminal equipment 20 issuing the power source disconnection request message automatically disconnects the power source when receiving the message of permission of power source disconnection by a power source disconnecting means 202, and displays the fact that the disconnection of power source is prohibited on a display part 203 when receiving the message of prohibition of power source disconnection.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power-off system for a terminal device, and more particularly to a system for powering down a terminal device in an equipment control system including a terminal device and a center system.

[0002]

2. Description of the Related Art A facility control system to which a conventional system is applied is a network in which a center system 1 is connected to a large number of terminal devices 3 via communication lines 2 as shown in FIG. The terminal device 3 is called a terminal station (TS), and when this equipment control system constitutes a building management system, it is arranged on each floor of the building. Terminal device 3
Each of them is connected to, for example, a maximum of about 60 equipment devices (hereinafter, simply referred to as “equipment”) 4.

On the other hand, the center system 1 includes a terminal station controller 5 connected to the communication line 2,
A plurality of man-machine stations 6 and master stations 7 each connected to the terminal station controller 5 are connected to form a local area network (LAN) configuration.

The center system 1 is provided in a central control room of a building. The terminal station controller 5 communicates with the terminal device 3 to individually control the terminal device 3 and collect information on the facility 4 from the terminal device 3.

The man-machine station 6 is a display device and a keyboard for monitoring the on / off of the equipment 4, the operating state, alarm information and the like, and is constructed so that it can be operated by an operator. The master station 7 accesses the terminal station controller 5 at regular intervals and collects and stores the stored information.

In the equipment control system, when the terminal device 3 is powered off for maintenance or the like, conventionally, the operator of the terminal device 3 stores the connection condition of the equipment 4 under the terminal device 3 based on the memory. If it is determined that the power can be turned off, the power is turned off.

[0007]

However, as in the case of the terminal device 3 in which the equipment 4 which constantly receives the control signal from the terminal device 3 is connected to the subordinate device due to an error in the memory of the operator of the terminal device 3, the conventional method is used. The terminal device 3 that should not be turned off may be turned off, and the control of the facility 4 may be stopped, causing an accident that seriously hinders the operation of the building facility.

The present invention has been made in view of the above points,
An object of the present invention is to provide a power-off method for a terminal device that solves the above-mentioned problems by leaving the power on / off by the power switch of the terminal device alone to the center system, and leaving it to the center system.

[0009]

FIG. 1 is a block diagram showing the principle of the present invention. In the invention according to claim 1, a plurality of terminal devices 2
0 is connected to the center system 10 via the communication line 40 while the equipment 30 is connected to the center system 10 and the center system 10 and the plurality of terminal devices 20 are individually communicated. 10
Is a storage device 101, a collating means 102, and a message returning means 1
03, and each of the plurality of terminal devices 20 has a message issuing means 201 and a power supply cutting means 202.

The storage device 101 stores in advance as a table the power-off condition of the equipment 30 connected to each point of the terminal device 20. The collation unit 102 collates the power-off request message from any terminal device among the plurality of terminal devices 20 with the corresponding power-off condition from the table of the storage device 101 to determine whether to allow or disallow power-off. .. Further, the message returning means 103 generates the above-mentioned message of power-off permission or non-permission of power-off and returns it to the terminal device which transmitted the power-off request.

Further, the message issuing means 201 issues a message of a power-off request to the center system 10. The power supply disconnecting means 202 disconnects the power supply to its own device when the power supply disconnection permission message is input from the center system 10.

According to the second aspect of the present invention, when the terminal device 20 receives a power-off non-permission message from the center system 10, the power-off non-permission message is issued based on the power-off non-permission message. The display unit 203 is configured to display the reason and necessary treatment for disconnection.

According to the third aspect of the present invention, when the center system 10 obtains the collation result of the power-off disapproval by the collating means 102, the display unit 1 displaying the power-off disapproval is displayed.
It is configured to have 04.

According to the fourth aspect of the invention, each of the terminal devices 20 issues a message to the effect that the operation mode has been changed to the center system 10 when the operation mode of the equipment 30 under it is changed. Operation mode change message issuing means 204
Have.

Further, in the invention described in claim 5, when the collating means 102 of the center system 10 receives the message indicating the change of the operation mode of the equipment 30, the corresponding power source in the table of the storage device 101 is input. This is to match the cutting conditions.

[0016]

In the invention according to claim 1, a plurality of terminal devices 20 are provided.
When powering off their own devices, each of them sends a power-off request message to the center system 10 via the communication line 40 and entrusts the center system 10 with a decision on whether to turn off the power. As a result of the collation means 102 performing the collation by the center system 10, when the collation result indicating that the power can be cut off is obtained, the power-off permission message is transmitted to the terminal device 20 requesting the power-off via the message return means 103. Since it is issued, the terminal device can be automatically turned off by the power-off means 202.

According to the second aspect of the present invention, when the terminal device 20 issues a power-off request message, when the center system 10 returns a power-off non-permission message, the display unit 203 displays the message. Since the cause of the power-off disapproval and the necessary measures are displayed, the operator of the terminal device 20 can be notified that some operation mode switching operation is necessary.

According to the third aspect of the present invention, the center system 10 displays the power-off non-permission display section 104.
Since the above is provided, it is possible to request the operator of the center system 10 to perform some operation intervention.

Further, in the inventions according to claims 4 and 5,
A message indicating a change in the operation mode of the equipment 30 is issued to the center system 10 by the operation mode change message issuing means 204, and the verification means 102 supplies this message to the power supply of the corresponding address in the table of the storage device 101. Since the check is performed again with the disconnection condition, the center system 1 responds to the power-off request after the operation mode of the facility 30 is changed.
0 can cause the power-off means 202 to automatically turn off the power.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 2 shows a block diagram of an embodiment of the present invention. In the figure, the same components as those in FIG. 1 are designated by the same reference numerals.
In FIG. 2, _three terminal devices, for example, 20 _{1 to} 20 ₃ are connected to the center system 10 via a communication line 40. Center system 10 and the terminal device 20 21 _to
0 ₃ is communicated via the communication line 40 in accordance with a known high level transmission control procedure (HDLC).

Storage device 101 in the center system 10
In the table, the power-off condition of the equipment connected to each point of the terminal devices 20 _{1 to} 20 ₃ (only the equipment 30 _n connected to the terminal device 20 ₃ is shown in FIG. 2 for convenience) is shown. It is assumed that only the equipment 30 _n connected to the terminal device 20 ₃ is provided with a power-off condition of “manual mode change”.

The display unit 1 in the center system 10
Reference numeral 04 includes a display 12 made of liquid crystal and a keyboard 13. Further, the power-off condition check program 14, the I / O control program 15, H in the center system 10
Collating means 10 by DLC line control program 16 and processor operated by these programs.
2 and the message return means 103 are configured.

On the other hand, the terminal device 20 ₃ uses the HDLC line control program 21, a program for issuing a message and a power-off command, a processor operating by the program, etc., and the above-mentioned message issuing means 201, power-off. Means 202, operation mode change message issuing means 204
Is configured.

Further, the terminal device 20 ₃ has a control and monitoring circuit 2
2. It has an operation mode receiver 23, a power supply 24, etc., and is connected to a switch (SW) 25 and a display 26.
The display 26 constitutes the display unit 203. The other terminal devices 20 ₁ and 20 ₂ have the same configuration as the terminal device 20 ₃ .

Furthermore, equipment which is connected to the terminal device 20 ₃ 3
0 _n has an operation mode switching signal transmitting section 31 and a control signal receiving section 32, and is connected to an operation mode switching switch (SW) 33. The operation mode switching SW 33 is a manual switch for switching the operation mode, and is operated by the operator.

Next, the operation of this embodiment will be described. In the following description, an operation sequence between the terminal device 20 ₃ and the center system 10 will be described, but it goes without saying that the other terminal devices 20 ₁ and 20 ₂ are processed in the same operation sequence.

First, the operation when the power-off is permitted is shown in FIG.
3 and FIG. The operator operates the terminal device 20 ₃
When the disconnection request SW25 is pressed (step S1 in FIG. 3),
The processor in the terminal device 20 ₃ performs a disconnection request signal process and sends a disconnection request message (step S in FIG. 3).
2). In the format of this disconnection request message, the disconnection request flag of the first bit of the format is set to "1" as shown in step S2 of FIG.

The above disconnection request message is transmitted to the center system 10 via the communication line 40 according to the HDLC procedure. The center system 10 sends this disconnect request message H
Reception processing is performed according to the DLC procedure (step S in FIG. 3).
3), further the power down condition of the equipment are connected by power-off condition check program 14 to the terminal device 20 _3, the terminal device 20 ₃ compared against the power down condition of the corresponding addresses of the table 11, as a result conditions If it is determined that the above condition is satisfied (step S4 in FIG. 3), the power-off permission message is issued (step S5 in FIG. 3).

In the format of the power-off permission message, the disconnection flag of the second bit becomes "1" as shown in step S5 of FIG. This power off permission message is HD
The terminal device 20 ₃ described above is transmitted via the communication line 40 according to a well-known HDLC procedure by the LC line control program 16.
Will be returned to.

After performing the power-off processing (step S6 in FIG. 3), the firmware of the terminal device 20 ₃ generates a power-off command (step S7 in FIG. 3) and disconnects the power supply 24 of its own device (same). , Step S8). As described above, according to the present embodiment, regardless of the memory of the operator of the terminal device 20 ₃ , it is possible to automatically and accurately turn off the power supply only by pressing the disconnection request switch (SW) 25.

Next, referring to FIG.
And FIG. 4 to FIG. 7. First, when the operator presses the power-off request switch (SW) 25 of the terminal device 20 ₃ (step S11 in FIG. 4), the power-off request message is transmitted by the terminal device 20 ₃ as in the case of the power-off permission described with FIG. The statement is sent to the center system 10 (step S12 in FIG. 4), the center system 10 receives the power-off request message (step S13 in FIG. 4), and the terminal device 20 _{3 in} the power-off condition table is powered off. The comparison and collation with the conditions (step S14 in FIG. 4) are sequentially performed.

[0032] Here, does not satisfy the power-off condition in step S14 (e.g., to the time of powering off the terminal device 20 ₃ is required operation mode of equipment 30 _n is manual, the operation mode of the equipment 30 _n Is determined to be automatic), the center system 10 creates a disconnection disapproval message and transmits it to the terminal device 20 ₃ (step S15 in FIG. 4), and disapproval factors (automatic mode, etc.). ) And the address of the equipment are displayed on the display 12 (step S1 in FIG. 4).
6), request some kind of operation intervention from the operator (Fig. 4
Step S17).

Further, the format of the cutting unauthorized Denbun the flag of the third bit of the cutting disallowed as shown in step S15 in FIG. 4 is "1", is received and processed by the terminal unit 20 ₃ (Fig. 4, step S17), and the display 26 displays the disapproval factors, necessary measures, etc. (step S in FIG. 4).
18).

The terminal device 20 ₃ changes the operation mode (manually) by looking at the display of the display 26 and pressing the operation mode switching SW 33 of the equipment 30 _n (step S1 in FIG. 4).
9). As a result, the operation mode switching signal reception unit 31 of the equipment 30 _n transmits the operation mode switching signal to the terminal device 20 ₃ . When the terminal device 20 ₃ receives this operation mode signal by the operation mode receiving unit 23 (step S20 in FIG. 4),
The operation mode change processing is performed, and as shown in step S21 of FIG. 4, an operation mode change message having the operation mode change flag of the fourth bit of "1" is generated and transmitted to the center system 10 through the communication line 40.

When the center system 10 receives this operation mode change message (step S22 in FIG. 4), the power supply disconnection condition check program 14 causes the equipment 3 connected to the terminal device 20 ₃ in the power supply disconnection condition table 11.
It is checked whether the power-off condition of 0 _n matches the power-off condition in the received operation mode change message (step S23 in FIG. 4).

If they match, step S24 in FIG.
Then, the center system 10 issues a power-off permission message and transmits it to the terminal device 20 ₃ via the communication line 40. When the terminal device 20 ₃ receives this power-off permission message (step S24 in FIG. 5), it issues a power-off command (step S25) and turns off its own power (step S26).

On the other hand, if it is determined in step S23 that they do not match, the process proceeds to step S27 in FIG. 6, where the center system 10 issues a power-off non-permission message including a power-off non-permission factor and displays it on the display unit 12. On the other hand (step S28 in FIG. 6), the data is transmitted to the terminal device 20 ₃ via the communication line 40. When the terminal device 20 ₃ receives the second power-off non-permission message (step S29 in FIG. 6), the display device 26
The disapproval factors and the like are displayed on the screen (step S30).

As a result, the operator of the terminal device 20 ₃ again operates the operation mode changeover switch 33 of the equipment 30 _n to change to the mode displayed on the display 26 (step S31 in FIG. 6), and the operation mode signal is output. The equipment 30
_n is sent to the terminal device 20 ₃ (the same step S
32).

The center system 10 operates in the second operation described above.
When the production mode change message is received (step S3 in FIG. 6)
4), the power off condition check program 14
Equipment 30 _nPower off condition and received operation mode change message
Check again whether the power off condition in the inside matches.
(Step S35 of FIG. 6).

If they do not match, the center system 10 is restarted.
Returns to the process of step S27. On the other hand, if they match, the center system 10 sends the power-off permission message to the terminal device 20 ₃ (step S36 in FIG. 7), and the terminal device 20 ₃ receives the power-off permission message (at step S37). , The power supply command is sequentially issued by the terminal device 20 ₃ (step S38), and finally the power supply 24 of the terminal device 20 ₃ is sent by the power off command.
Is cut (step S39).

[0041]

As described above, according to the present invention, the power-off of the terminal device is compared and collated with the power-off condition table stored in advance in the storage device in the center system to obtain the collation result of the power-off permission. Since the power is automatically turned off only when the power is turned off, it is possible to completely prevent the power off accident of the terminal device, which may occur conventionally because the operator relies on the memory.

When the power-off is not permitted, the operator of the terminal device is informed that it is necessary to perform an operation to switch to any operation mode by displaying the fact and necessary measures on the display part of the terminal device. Because I decided to
It is also necessary for the operator of the center system because the power of the terminal device can be turned off by switching the operation mode and the above-mentioned power-off non-permission can be displayed for the center system. Further, according to the present invention, it is possible to cut off the power supply of the terminal device by changing the operation mode of the equipment when the power supply is not permitted. Therefore, the safety and reliability of the equipment control system can be improved. It has the advantage that it contributes to the improvement of

[Brief description of drawings]

FIG. 1 is a principle configuration diagram of the present invention.

FIG. 2 is a configuration diagram of an embodiment of the present invention.

FIG. 3 is an operation sequence diagram when power-off is permitted.

FIG. 4 is an operation sequence diagram (No. 1) when the power-off is not permitted.

FIG. 5 is an operation sequence diagram (part 2) when the power-off is not permitted.

FIG. 6 is an operation sequence diagram (part 3) when the power-off is not permitted.

FIG. 7 is an operation sequence diagram (No. 4) when the power-off is not permitted.

FIG. 8 is a configuration diagram of an example of an equipment control system to which a conventional method is applied.

[Explanation of symbols]

10 center system 20, 20 ₁ , 20 ₂ , 20 ₃ terminal device 30, 30 _n equipment 101 storage device 102 collating means 103 message returning means 104, 203 display section 201 message issuing means 202 power cut means 204 operation mode change transmission Issuing means

Claims (5)

[Claims] 1. A plurality of terminal devices (20) are each subordinate to an equipment (30) and are connected to a center system (10) via a communication line (40), and the center system (10) is connected. In the system for individually communicating between the terminal device (20) and the plurality of terminal devices (20), the center system (10) includes the equipment (30) connected to each point of the terminal device (20). A storage device (101) that stores power-off conditions in advance as a table, a power-off request message from any terminal device of the plurality of terminal devices (20), and a table from the storage device (101). Collating means (102) for collating with a corresponding power-off condition to determine permission or non-permission of power-off, and power-off permission or non-permission of power-off determined by the collating means (102) And a message returning unit (103) for returning the power-off request to the terminal device that transmitted the power-off request, and each of the plurality of terminal devices (20) sends a power-off request message. A message issuing means (201) for issuing to the center system (10), and a power supply disconnecting means for cutting off the power supply to the own device when a power-off permission message is input from the center system (10). (202) and a power-off method for a terminal device. 2. When each of the terminal devices (20) receives the power-supply-disapproval message from the center system (10), the power-supply-disapproval message is used to prohibit the power-supply-disapproval message. The display unit (203) for displaying the reason and the necessary treatment for disconnection.
The power-off method for the described terminal device. 3. The center system (10), when the collating means (102) obtains a collation result indicating that power-off is not permitted, the center system (10) displays a power-off not-permission.
04) is provided, the power-off method of the terminal device according to claim 1. 4. When the operation mode of the equipment (30) under it is changed, each of the terminal devices (20) sends a message to the effect that the operation mode is changed to the center system (10). Operation mode change message issuing means (20)
4. The power-off method for the terminal device according to claim 1, further comprising 4). 5. The collating means (102) of the center system (10), when the operation mode change message is input, the message and the corresponding power source in the table of the storage device (101). The power-off method for the terminal device according to claim 4, wherein the power-off method is matched with a disconnection condition.