JPS63293618A - Remote resetting device - Google Patents

Abstract

PURPOSE:To individually reset slave devices by using a signal detecting circuit which detects the address and reset signals of the slave device and a reset signal output circuit. CONSTITUTION:A remote resetting device includes a slave device 2 consisting of a microcomputer and an electronic circuit, a central device 1 which gives the batch supervising control to the device 2, and a remote resetting device 3 which always supervises the signals transferred between the device 2 and the device 1 and outputs a reset signal to the device 2 if the corresponding address and reset signals are detected. The device 1 controls plural devices 2 with a specific address applied to each device 2. Then the device 3 consists of a receiving signal, a signal detecting circuit 32 and an output circuit 33. When the device 3 detects the corresponding address and reset signals out of the received signals, the device 3 transmits both signals to the circuit 33 and delivers a reset signal to the device 2 for its remote resetting action.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a remote reset device that resets a plurality of slave units by a signal from a central unit that collectively monitors and controls a plurality of slave units that control equipment.

Conventional technology In recent years, with the development of computer technology, it has become possible to control the operation of equipment installed in buildings and other locations using slave units using microcomputers, and to collectively monitor and control these multiple slave units by a central unit. are becoming more common.

FIG. 3 is a block diagram showing the configuration of a slave device incorporating a conventional remote reset device. In Fig. 3, conventionally, handset 2
If the CPU 23 of the handset goes out of control, the person in charge goes to the site where the handset is installed, presses the reset switch 261 of the reset circuit 26 inside the handset, sends the CPU 2.3 reset signal, and resets the handset 2. What? was.

Problems to be Solved by the Invention However, with the configuration of the conventional handset described above, if the CPU of the handset goes out of control, manual labor is always required, and when installing the handset, it is necessary to operate the reset switch. There was a problem in that it had to be installed in such a way that it could be installed.

The present invention takes into account the above-mentioned conventional problems and provides a remote reset device that has a simple configuration and can remotely reset the slave unit in response to a command from a central unit when the CPU of the slave unit goes out of control. aim - something.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides a data transmission line that branches out from a data transmission line that connects a plurality of slave units installed in a distributed manner to control devices and a central unit that collectively monitors and controls them. connected,
a receiving circuit that constantly receives a signal transmitted from the central device to the slave device; a signal detection circuit that detects a corresponding address signal and a reset signal of a received signal output from the receiving circuit and outputs a detection signal; and an output circuit that inputs the detection signal of the detection circuit and outputs a reset signal to the slave device.

Effect With the above configuration, the receiving circuit always receives the signal communicated between the central device and the slave device, outputs the signal as a received signal to the signal detection circuit, and the signal detection circuit receives the input received signal. When it detects the corresponding address signal and reset signal from among them, it outputs the detection signal to the output circuit, and when the detection signal is input, the output circuit outputs the slave unit helicopter reset signal and performs remote reset. becomes.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of a remote reset device in an embodiment of the present invention. In Fig. 1, a handset 2 whose interior is composed of peripheral components including a general microcomputer and electronic circuits, a central device 1 that collectively monitors and controls the handsets 2, and a system between the central device 1 and the handset 2 are shown. It consists of a remote reset device 3 that constantly monitors the communicated signals and outputs a reset signal to the handset 2 if there is a corresponding address signal and reset signal. manages each of the plurality of slave devices 2.

The remote reset device 3 connects the central device 1 and the handset 2 with a data communication line 4, and includes a receiving circuit 31 connected in multiple branches to the data communication line 4 in order to constantly receive the communicated signals. A signal detection circuit 32 that outputs a detection signal when a corresponding address signal and reset signal are detected in the reception signal output by the reception circuit 31, and an output circuit that outputs a reset signal to the handset 2 when the detection signal is input. 33.

FIG. 2 is a block diagram including the electronic circuit of the main part of this embodiment, in which a 16-bit shift register 311 is used for the receiving circuit 31 of the remote reset device 3, and the signal detection circuit 32 is a 16-bit shift register 311.
The output circuit 33 is composed of an IT comparator 321 and a 16-bit ROM 322 that stores address signals and reset signals, and the output circuit 33 uses a transistor 331 and a photocoupler 332.

In the above configuration, the signal communicated between the data transmission line 4 of the central device 1 and the slave device 2 is transmitted through the 1-ebit shift register 3.
11, the sequential serial signal is converted into a 16-bit parallel signal and input to the comparator 321. R
The OM 322 stores an s btt address signal, for example (14), 6 assigned to the slave device 2 connected to this remote reset device 3, and an abit reset signal, for example (SS) 16, which is predetermined. hand,
This is always input to comparator 321.

Here, in order to reset the handset 2, the central device 1 successively transmits the address signals (14) 16 and the reset signal (66) 16 for the handset 2, and this signal is sent to the shift register 311 in parallel. The signal is converted into a signal and input to the comparator 321. Since the received signal output from the shift register and the output signal from the ROM 322 match, the comparator outputs a matched detection signal to the output circuit 33. This matching detection signal drives the transistor 331, causing current to flow through the light emitting part of the photocoupler 332, the light receiving part of the photocoupler 332 operates, and the CPU of the slave unit 2 is activated.
The voltage level of the reset terminal 231 of 23 is lowered to the ground level. The CPU 23 has a reset terminal 231
It is reset when the voltage drops to ground level. The above operation is performed regardless of whether the CPU 23 runs out of control.

Effects of the Invention As described above, the present invention includes a receiving circuit that constantly receives signals transmitted from a central device, and a signal detecting circuit that detects the address signal and reset signal of a corresponding slave unit from among the received signals. An output circuit is provided to output a reset signal to the slave unit based on the detected signal, and the CP of the slave unit is
When U goes out of control, a circuit with a simple configuration as described above can be used.
The slave devices can be reset individually from a remote central device, and a great practical effect can be obtained.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing the configuration of a remote reset device according to an embodiment of the present invention, Fig. 2 is a block diagram showing the main parts of the remote reset device mixed with an electronic circuit, and Fig. 3 is a conventional example. FIG. 2 is a block diagram showing the configuration of a remote reset device built into the handset. 1...Central device, 2...Slave unit, 3...
...Remote reset device, 31...Reception circuit, 32...Signal detection circuit, 33...Output circuit.

Claims (1)

[Claims] A receiver that is installed in a distributed manner and is branched from and connected to a data transmission line that connects multiple slave units that control devices and a central unit that performs collective monitoring and control, and that constantly receives signals sent from the central unit to the slave units. a signal detection circuit that detects the corresponding address signal and reset signal of the received signal output from the receiving circuit and outputs a detection signal; and a signal detection circuit that inputs the detection signal of the signal detection circuit and sends a reset signal to the slave unit. A remote reset device consisting of an output circuit that outputs.