JPS63207297A - Centralized monitor equipment - Google Patents

Abstract

PURPOSE:To quickly transmit urgent information without any radio interference by providing each terminal monitor equipment with a request signal output means and a transmitting means which transmits information of abnormality to a common signal line and providing a central monitor equipment with an information priority discriminating part and a receiving means which receives the information of abnormality. CONSTITUTION:When a request signal 71a is received, an information priority deciding part 30 incorporated in a central monitoring unit 1 confirms whether the request signal from another terminal monitor equipment exists or not. If a terminal monitor equipment 2b transmits a request signal 71b while a terminal monitor equipment 2a transmits information, the central monitor equipment 1 refers to information of the terminal monitor equipment 2a and temporarily holds transmission of a permitting signal 81b to the terminal monitor equipment 2b. Consequently, the information priority deciding part 30 outputs the permitting signal 81b to the terminal monitor equipment 2b after receiving all of information of the terminal monitor equipment 2a through a signal line 20. Thus, the central monitor unit quickly and surely receive urgent information without radio interference between both information on the common signal line.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention connects a plurality of terminal monitoring devices and a central monitoring device etc. via a signal line drawn out from a central monitoring device, and the central monitoring device monitors each of the terminals. The present invention relates to a centralized monitoring device that monitors information on devices.

(Prior Art) FIG. 2 is a block diagram showing a conventional centralized monitoring device. The conventional centralized monitoring device shown in FIG. 2 includes a central monitoring device 101 and a plurality of terminal monitoring devices g102a.

Common signals between 102b,...102n! 1
20, if a failure occurs in two or more terminal monitoring devices at the same time, each terminal monitoring device simultaneously transmits its own failure information to the central monitoring device 101. Therefore, there is a drawback that the information on both sides is conflicted on the common signal line 20, resulting in interference.

4. In order to solve the above drawbacks, addresses are set in advance for multiple terminal monitoring devices, and by polling the multiple terminal monitoring devices sequentially from the central monitoring device, each terminal monitoring device can be accessed in a time-sharing manner. A monitoring method for monitoring has been proposed.

(Problems to be Solved by the Invention) However, in the above-mentioned centralized monitoring method using the polling method, since each terminal monitoring device is monitored in a time-sharing manner, information from two or more terminal monitoring devices may interfere with each other. While this problem has been solved, even if each terminal monitoring device detects information such as a failure that should be urgently transmitted, it is not possible to immediately transmit such urgent information to the central monitoring device. In other words, a terminal monitoring device that detects a failure must wait until its own address is called by polling from the central monitoring device in a predetermined order, which delays the transmission of emergency information. There were serious shortcomings.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a centralized monitoring device that can quickly transmit urgent information without causing interference.

(Means for Solving the Problems) In order to solve the above problems, the present invention provides means in which a plurality of terminal monitoring devices are connected to a central monitoring device via a common signal line, and a plurality of terminal monitoring devices are connected to a central monitoring device via a common signal line. The central monitoring device is a centralized monitoring device that monitors information sent from the terminal monitoring devices via the common signal line, and each of the terminal monitoring devices outputs a request signal when an abnormality is detected. output means; and transmitting means for transmitting the abnormality information to the common signal line when receiving a permission signal from the central monitoring device in response to the request signal, and the central monitoring device has one or two an information priority determination unit that determines the priority order when receiving the request signal from the terminal monitoring device and outputs the permission signal to the terminal monitoring device with the highest priority; and receiving means for receiving the abnormality information.

(Example) Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention.

1 is a central monitoring device, a common signal line 20 is drawn out from the central monitoring device 1, and a plurality of terminal monitoring devices g2a, 2
bl...2n are connected to each other.

First, the internal configuration of the central monitoring device 1 will be explained. 5 is a receiving section, and the receiving section 5 is connected to a plurality of terminal monitoring devices 2a, 2b, .
...Receive information transmitted from 2n. This receiving section 5
The information received is intensively monitored by the monitoring information processing unit 9. Specifically, the monitoring TFF information processing section 9 decodes the information input from the receiving section 5, and turns on the LED according to the decoding result.
etc. to display the information content. Reference numeral 30 denotes an information priority determination unit, and when this information priority determination unit 30 receives a request signal from each terminal monitoring device, it sends back a permission signal to the terminal monitoring device that sent the request signal, thereby allowing the information priority determination unit 30 to monitor the relevant terminal. Allow information to be transmitted from the device. Furthermore, when receiving request signals from two or more terminal monitoring devices, the information priority determination unit 30 determines the priority order based on the importance of each terminal monitoring device or the number of each terminal monitoring device. Then, permission signals are sequentially transmitted based on this determined priority order. The permission signal transmitted at this time is transmitted by closing a contact such as a relay built into the information priority determining section 30.

Next, the terminal monitoring device g2a will be described as a representative among the plurality of terminal monitoring devices f2a, 2b, . . . 2n.

As shown in FIG. 1, the terminal monitoring device 2a includes a transmitting section 6a and a data processing section 10a. This data processing section 1
0a inputs a plurality of input signals 41a, 41b, . Further, when the data processing unit 10a detects that a failure has occurred as a result of decoding the plurality of input signals 41a, 411)...41n, the data processing unit 10a sends the central monitoring bag? ! ! The request signal 71a is sent to the device 1 to notify that there is information to be transmitted. Upon receiving the permission signal 81a from the central monitoring device 1 in response to the quest signal 71a, the data processing section 10a transfers the fault information to be transmitted to the transmitting section 6a and outputs a transmission command. The transmitter 6a transmits the above-mentioned fault information to the central monitoring device 1 via the signal line 20 based on a transmission command from the data processor 10a.

The internal configuration described above is similar to that of other terminal monitoring devices 2b...
The same applies to 2n.

Next, a case will be described in which a plurality of terminal monitoring devices detect an abnormality.

For example, a case will be described assuming that after the terminal monitoring device ff2a detects an abnormality and transmits the request signal 71a, the terminal monitoring device W2b similarly detects an abnormality and transmits the request signal 71b. First, when the information priority determination unit 30 built in the central monitoring device 1 receives the request signal 71a, it checks whether or not there is a request signal from another terminal monitoring device. Immediately install the terminal monitoring device 2 only if it does not exist.
A permission signal 81a is transmitted to a. Therefore, the terminal monitoring device %2a transmits its own failure information to the central monitoring device 1 via the signal line 20. In such a state, that is, in a state where the terminal monitoring device 2a is transmitting information, the terminal monitoring device W 2
When b sends the request signal 71b, the central monitoring device 1 receives the request signal 71b from the terminal monitoring device 7ff at the time when the information priority determination unit 30 receives the request signal 71b.Since the request signal 71a from 2a continues, the central monitoring device 1 2
Priority is given to information a, and transmission of the permission signal 81b to the terminal monitoring device 2b is temporarily suspended. Therefore, after receiving all the information of the terminal monitoring device 2a via the signal line 20, the information priority determination unit 30 transmits the permission signal 81b to the terminal monitoring device W.
2 Output to b.

Next, a case will be described in which request signals from two or more terminal monitoring devices are simultaneously received. When the information priority determination unit 30 receives a plurality of request signals, it determines the priority order based on the importance of the terminal monitoring device or the number of each terminal monitoring device, and sequentially selects corresponding requests based on the priority order determined in step 2. Sends a permission signal to the terminal monitoring device. Therefore, information from each terminal monitoring device is sequentially transmitted to the central monitoring device 1 via the signal line 20 based on this priority order.

(Effects of the Invention) As explained above, according to the present invention, the central monitoring device can quickly receive urgent information. Also,
Even if multiple terminal monitoring devices detect R harm at the same time, the central monitoring device can reliably receive the information from both of them without causing interference on the common signal line. It will be done.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention, and FIG. 2 is a block diagram showing a conventional example. DESCRIPTION OF SYMBOLS 1... Central monitoring device, 2a, 2b, A-2n... Terminal monitoring device, 5... Receiving section, 6a, 6b, 6n...
Transmission unit, 9... Monitoring information processing unit, 1Qa, 10b
, ~10n... data processing section, 20... signal line,
30... Information priority determination unit.

Claims (1)

[Claims] A plurality of terminal monitoring devices are connected to a central monitoring device via a common signal line, and the central monitoring device monitors information sent from each of the terminal monitoring devices via the common signal line. , each of the terminal monitoring devices includes a request signal output means for outputting a request signal when an abnormality is detected, and a request signal output means for outputting a request signal when an abnormality is detected, and a request signal output means for transmitting information on the abnormality to the common communication when receiving a permission signal from the central monitoring device in response to the request signal. and transmitting means for transmitting to the line, the central monitoring device determines the priority when receiving the request signal from one or more of the terminal monitoring devices, and outputs the permission signal to the terminal monitoring device with the highest priority. A centralized monitoring device comprising: an information priority determining section that performs the above-described processing; and a receiving section that receives the abnormality information transmitted from the transmitting section to the common signal line.