JPH069070B2 - Information monitoring control system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention connects a terminal device for transmitting information such as temperature, smoke concentration, intrusion alarm, etc. to a common transmission line, receives this signal, and processes it. The present invention relates to an information monitoring control system, and more particularly to means for setting an address of each terminal device.

[Embodiment] As the address setting means of the terminal device having a unique address, conventionally, a mechanical switch such as a multiple switch or a rotary digital code switch having an on / off contact with a predetermined number of bits is used. Alternatively, a rewritable EPROM or the like using a semiconductor memory has already been proposed as Japanese Utility Model Publication No. 61-126393 or Japanese Utility Model Publication No. 60-82389.

The address setting of such a conventional address setting means is
For example, in the case of fire detectors, setting or writing at the time of manufacture of the detector, sticking the number on a label etc., or setting the switch by operating a driver etc. at the installation site of the terminal is taken. Was there.

[Problems to be Solved by the Invention] Since the address setting of such a conventional terminal device is not performed individually by each terminal device and is not performed in association with the central processing unit, duplicate address setting or different type There is a problem that wrong types of address settings may be made when different types of terminals are mixed, and when used for disaster prevention and crime prevention devices, these mistakes are very dangerous and may be extremely dangerous. .

[Means for Solving the Problem] According to the present invention, a large number of terminals are connected to a common transmission line, a unique address assigned to each terminal is sequentially and cyclically called, and returned from the called terminal. In an information monitoring control system including a central processing unit that monitors and controls an abnormality based on the information obtained, the central processing unit repeats an address signal for setting when setting the unique address of the terminal device. The terminal device is provided with an operating means for transmitting and setting a unique address, and an address buffer for receiving and storing an address signal from the central processing unit when the operating means is operated. The above problem is solved by the fact that it is characterized.

[Embodiment] FIG. 1 is a schematic block diagram of an essential part showing an embodiment of the present invention, and FIGS. 2 and 3 are a time chart and a flow chart for explaining the operation of FIG. 1, respectively.

In FIG. 1, Re is a central processing unit, which is an arithmetic processing unit 4 including a microprocessor or various memories.
And outputs a clock signal to the clock line 1, and this clock signal converts the output of the counter 7 into a serial signal by the counter 7 to which the address signal from the arithmetic processing unit 4 is applied. A shift register 8 for sending an address signal to the address line 2,
The shift register 9 to which the return data and the clock signal from the data line 3 are applied and which applies the data to the arithmetic processing unit 4.
Are applied to each.

The transmission line consisting of the clock line 1, the address line 2 and the data line 3 extending from the central processing unit Re has a plurality of terminals S.
Are connected. The terminal S has a shift register 11 for reading an address from the central processing unit Re and a shift register 13 as an address buffer for storing the address.
And the contents of these shift registers 11 and 13 are compared with each other, and when they match, an address comparator 1 which sends a match signal
2, the sensor 20 for detecting temperature, smoke density, etc., the information converter 15 for coding the output of the sensor 20, and the signal of the information converter 15 based on the coincidence signal of the address comparator 12, and the data line 3 To the central processing unit Re, which is a shift register 14 for sending a serial signal to the serial register, a NAND gate 16 for detecting start and stop bits of the address signal stored in the shift register 13, and an operation means for starting address setting. A switch SW1 for supplying the clock signal of 1 to the shift register 13,
An AND gate 17 is provided, which is controlled by the output of the NAND gate 16 and controls the clock signal applied to the shift register 13.

The address setting procedure of the present invention in such a configuration will be described below in detail with reference to the time chart shown in FIG. 2 and the flow chart shown in FIG.

First, an address signal is sent out according to a predetermined procedure based on turning on of a start switch (not shown) of the central processing unit Re. This address signal is programmed in the arithmetic processing unit 4 so as not to advance to the next address signal until the address setting of the terminal S is completed and return data is present, as shown in the flowchart of FIG. It is assumed that

In the time chart of FIG. 2, 8 bits are allocated for an address, and an address setting example of the 75th (01110101) hexadecimal terminal device S is shown. First, the switch SW ₁ of the 75th terminal S is operated to close it. At this time, the address pulse of 01110101 is repeatedly transmitted from the central processing unit Re to the address line 2 with the start / stop bits as shown in FIG. By closing the switch SW ₁ , this address pulse is sequentially read into the shift register 13, and when the reading is completed normally,
The output of the NAND gate 16 to which the start / stop bit is applied becomes L, the clock signal from the AND gate 17 to the shift register 13 is cut off, and the address setting is completed. When the 75th same address code comes again from the address line 2, an address match signal is issued from the address comparator 12, and the information of the sensor 20 via the information converter 15 and the start / stop bits are transferred to the shift register 1.
4 and is sent from the data line 3 to the central processing unit Re as a serial signal.

When this data transmission is completed, as shown in step f of FIG. 3, the pulse of the next address (for example, 76th) is repeatedly transmitted from the central processing unit Re, and the address is set according to the above procedure. .

The switch SW ₁ may be opened when the address setting is completed.

When rewriting to a different address, when the switch SW ₁ is closed, an instant reset signal (not shown) is applied to the shift register 13, so that the previous address number written in the shift register 13 disappears. In this embodiment, the address is set by operating the switch SW ₁ of the terminal S, but the method is not limited to such a method, and the same effect can be expected by using other means. it can.

When the address setting of each terminal device S is completed in this way, the central processing unit Re moves to step g in the flowchart of FIG. 3, and thereafter, in accordance with steps h to n, sequentially and cyclically processes the data fetched by the address polling. However, an alarm display is displayed.

As the address buffer, it is preferable to use a battery non-volatile memory such as a battery backup of the buffer or a rewritable EEPROM so that the buffer does not disappear due to power failure or the like. Needless to say, the above-mentioned address line, data line, etc. can be implemented as a pair of electric wires by a time division multiplex transmission method.

[Effects of the Invention] According to the information monitoring control system of the present invention, at each terminal installation location, the address is set while exchanging a signal with the central processing unit, so that it does not correspond to the duplicate setting or the installed terminal. Wrong address setting and the like cannot occur, there is no contact failure like a mechanical address switch, integration is possible, and extremely accurate address setting is possible.

[Brief description of drawings]

FIG. 1 is a schematic circuit diagram of an essential part showing an embodiment of the present invention,
2 and 3 show a time chart and a flowchart for explaining the operation of FIG. 1, respectively. Re ... Central processing unit, 1, 2, 3 ... Transmission line, S ... Terminal device, 4 ... Arithmetic processing unit, 11, 13, 14 ... Shift register, 12 ... Address comparator, SW ₁ ... Switch, 15 ...
Information converter, 20 ... Sensor

Claims (1)

[Claims] 1. A number of terminals are connected to a common transmission line, the unique addresses assigned to the terminals are sequentially and cyclically called, and abnormalities are detected based on information returned from the called terminals. In an information monitoring control system including a central processing unit for monitoring and controlling, the central processing unit repeatedly sends an address signal for setting when setting a unique address of the terminal unit, and the terminal unit Information monitoring control, comprising: operating means for setting a unique address; and an address buffer for receiving and storing an address signal from the central processing unit when the operating means is operated. system.