JPS63206097A - Remote supervisory and controlling system - Google Patents

Abstract

PURPOSE:To restore respective electrical equipments to a condition before the power failure as necessary without using expensive components to a slave station by providing a setting switch set when the electrical equipments of respective slave stations are required to be the working condition before the power failure. CONSTITUTION:When one polling period is terminated at a master station 1, the working condition of an electric equipment and the action holding information '1' of a setting switch 29 in respective slave stations 2 are stored into a RAM 11'. At this time, when the power failure is generated and the power failure is returned, the master station 1 reads the information of the RAM 11' backed up by a power source 14' for back-up, selects the slave stations 2 in which the action holding information is '1', and further, extracts the slave stations 2 in which the electrical equipment among the slave stations 2 is in the action condition. The master station 1 executes the polling only to the extracted slave stations 2, turns on the output relay part 22 of the slave stations 2, controls the electrical equipment to the working condition and reproduces the working condition before the power failure.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a remote monitoring and control system having a master station and a plurality of slave stations provided thereto.

[Conventional technology]

Conventionally, in this type of system, for example, Japanese Patent Publication No. 60-44876 (HO4Q 9100) fc
As you can see, there are cases in which a master station monitors changes in the status of multiple slave stations, and as seen in Japanese Patent Publication No. 60-31307 (HO4Q 9/16), a master station monitors changes in the status of multiple slave stations. There are some devices that control load appliances connected to individual terminals and report the status of the load appliances to a master station using switches, sensors, etc. connected to each terminal.

By the way, in such a system, when a power outage occurs, the electrical equipment connected to each slave station is turned off, but even after the power outage is restored, each electrical equipment remains off for safety reasons.

Because of C(7), it is necessary to restore the system to normal after confirming that the power has recovered. Conventionally, the master station individually sends control data to all slave stations according to the electrical equipment of each slave station. A manual transmission method is adopted, which has the drawback of being extremely inconvenient to use.

Here, the master station is equipped with a memory that stores the operating status of the electrical equipment of each slave station and a backup power source for the memory, and after a power outage returns, the master station automatically sends control data based on the data stored in the memory. It is conceivable to transmit the information to each slave station and control each electrical device to its operating state before the power outage.

However, depending on the electrical equipment connected to each slave station, it may be inconvenient for the operating state before the power outage to be maintained after the power outage is restored, which is inconvenient.

On the other hand, for slave stations that have electrical equipment that you want to maintain the operating state before the power outage even after the power is restored, it is possible to maintain the operating state after the power goes out by using a backup power source for the slave station. In this case, not only the circuit configuration of the slave station is significantly changed, but also the number of circuit parts and the like is increased, resulting in an increase in size and cost.

Furthermore, it is conceivable to use a keep relay or the like to maintain the operating status of each electrical device in each slave station even during a power outage, but keep relays are expensive and, moreover, the operating status before the power outage is maintained after the power outage is restored. This creates the inconvenience of not being able to connect electrical equipment that would otherwise be a problem.

[Problem that the invention seeks to solve]

This invention was made with the above points in mind,
After a power outage returns, each electrical device can be changed as needed without major circuit changes or the use of expensive parts in the slave station.
The purpose is to provide a means to maintain the operating state before a power outage.

[Means for solving problems]

The present invention provides a remote monitoring and control system in which a master station and a plurality of slave stations are connected via a transmission medium, and the master station monitors and controls electrical equipment connected to each of the slave stations. , Each of the slave stations is provided with a setting switch that is set when it is desired to reproduce the operating state of each electrical device before the power outage after the power has recovered, and the setting switch is included in the data returned from each of the slave stations to the master station. the master station is provided with a memory for storing information on the operating state of each electrical device of each of the slave stations and information of each setting switch of each slave station, and a backup power source for the memory is provided;
After the power is restored, the master station controls the electrical equipment of the slave station in which the setting information of the setting switch is stored to the operating state stored in the memory. .

[Effect]

Therefore, in this invention, the setting switch is set in each slave station when it is desired to maintain the respective electrical equipment in the operating state before the power outage after the power outage has been restored. The operating status and setting switch information of each slave station's electrical equipment are stored in the memory, and after the power is restored, the master station returns the electrical equipment to the slave station where the setting switch setting information was stored, and the operating status of that electrical equipment is stored. Through this control, only the desired electrical equipment can be restored to its operating state before the power outage.

〔Example〕

Next, the present invention will be described in detail with reference to drawings showing one embodiment thereof.

First, Figure 2 shows the overall configuration of the system. The master station il+ and each slave station (2) are connected via power lines (3).

In addition, FIGS. 1(a) and (b) show the internal configurations of the master station +1+ and the slave station (2), respectively, and the master station il
In Fig. 1(a) d, which shows +, (11) is RAM (
111' is a central processing unit, (121 is a display unit such as a CRT, (+3+ is a dip switch unit for house code registration, (14) is a power supply unit, A backup power source (including +4f) is used for backup. (15) is a receiving section, (16) is a transmitting section, and (17) is a key power section such as a keyboard.

(I8) is a coupling circuit for coupling the master station il+ to the power line (3), and is composed of a coupling capacitor (CC), a coupling filter (G), and the like. (Vcc) indicates a DC power supply terminal.

Furthermore, in FIG. 1(b) showing the slave station t21,)
21) is the central processing unit, and the part is the output relay that turns on and off the electric equipment of the slave station (2), and the electric equipment is connected to the power line (3) drawn into the slave station (2). At the same time, a relay switch d is inserted into this power line (3).匈) is a dip switch unit for setting the house code, and sets the house code of the master station (11).

(24) is a dip switch section for setting the device code indicating the electrical equipment, (251 is a power supply circuit section, the example is a receiving section, the penalty is a transmitting section, and (c) is a power line +
This is a coupling circuit for coupling to 31.

(29) is a setting switch that is turned on when you want to reproduce the operating state of electrical equipment before the power outage after the power outage has returned;
One end is grounded, and the other end is connected to the DC power supply terminal (Vcc) via a pull-up resistor (C). Connected to bag &@1).

Therefore, depending on whether the switch 29+ is turned on or off, a low level signal and a high level signal are sent to the central processing unit (
21).

Note that the house code is for connecting the master station (1) and the slave station (2) provided thereto,
For example, if multiple master stations (11) and multiple slave stations (2) are connected by a common power line (3), one master station il+ will have multiple Child station (2
), the master station (1) and the plurality of slave stations (2) are coupled by software by setting each house code to the house code registered in the master station (1). In other words, this house code makes it possible to classify each control object, control content, etc.

Next, the operation of the system will be explained.

This system basically uses the l-mask polling method, and the master station (11) connects the power line (11) to each slave station (2).
3) and receives return data from each slave station (21).

This returned data has the format shown in Figure 4, in which an 8-bit synchronization preamble is followed by an 8-bit address consisting of a 4-bit house code and a 4-bit device code. This allows the slave station (
2) The electrical device is identified, and the next 8 pieces of data indicate the operating state of the electrical device, that is, the state of the output relays, etc., and 1-bit operation retention information by the setting switch and 1 Bit parity continues.

The operation holding information is, for example, "1" when the setting switch 9) is on, and "0" when it is off.

Therefore, when one polling cycle ends, the master station tll stores the operating status and operation retention information of the electrical equipment in each slave station (2) in the RAM (Ilr), and uses the returned data to (2), polls only the slave station (2) that requires control, and transmits command data.

Of course, if the status changes or setting switch switch 9 occurs in the slave station (2),
) (in this case, the information in the RAM (llj') is rewritten by the data returned from the slave station (21).

Next, if a power outage occurs, when this power outage returns,
The master station (1) reads the information of the RAM (ul' backed up by the backup power supply (+4f),
Selects a slave station (2) whose operation retention information is "1", and further extracts a slave station (2) whose electrical equipment is in an operating state (output relay part 24 is on) from among these slave stations (2). do.

Then, the master station (11) polls only the extracted slave station (2), turns on the output relay part Q of the slave station (2), and controls the electrical equipment to be in operation. , maintain, or reproduce, the operating state before the power outage.

As a result, the slave station (2
), after the power outage returns, the electrical equipment will be restored to its operating state before the power outage. For example, if a hanging lighting fixture connected to the ceiling of a wiring fixture is used as the electrical equipment, the operating state will be restored after the power outage returns. This is a convenient emergency trap because it lights up automatically.

In addition, in the above embodiment, the case where one electric device is connected to one slave station (2) is shown, but it can be implemented in the same way when multiple electric devices are connected, and each electric device is Output relay part (27J, dip switch part to+, (2
41 and a setting switch (29).

Further, in the embodiment, a case is shown in which a power line (3) is used as the transmission medium, but it goes without saying that other transmission media such as radio waves, infrared rays, ultrasonic waves, and optical fibers may be used.

〔Effect of the invention〕

As described above, according to the remote monitoring and control system of the present invention, by simply providing a setting switch in each slave station and adding the information bit of the setting switch to the data returned from the slave station, it is possible to This allows the master station to automatically maintain the operating state of electrical equipment that you want to reproduce in the operating state it was in before the power outage, and it does not require major circuit changes or enlargement of the slave station, and it does not require expensive parts. There is no need to use
This system eliminates the drawbacks of the conventional system, and also allows you to select the reproduction of the operating state before a power outage depending on the electrical equipment using a setting switch, resulting in a versatile and extremely easy-to-use system.

[Brief explanation of the drawing]

The drawings show one embodiment of the remote monitoring and control system of the present invention, in which FIGS. 1(a) and 1(b) are block diagrams of a master station and a slave station, respectively, FIG. 2 is a schematic configuration diagram of the system, and FIG.
The figure is an explanatory diagram of the format of returned data. tll...master station, (u4...RAM, (+4(...)
Backup power supply, (2)...Slave station, (29)...
・Setting switch, (3)...Light line.

Claims (1)

[Claims] (1) A remote monitoring and control system in which a master station and a plurality of slave stations are coupled via a transmission medium, and the master station monitors and controls electrical equipment connected to each of the slave stations, Each of the slave stations is provided with a setting switch that is set when it is desired to reproduce the operating state of each electrical device before the power outage after the power is restored, and the information of the setting switch is included in the data sent back from each of the slave stations to the master station. and the master station is provided with a memory for storing the operating state of each electrical device of each of the slave stations and information of each setting switch of each slave station, and a backup power source for the memory is provided,
After the power is restored, the master station controls the electrical equipment of the slave station in which the setting information of the setting switch is stored to the operating state stored in the memory. system.