JP3151276B2 - Remote monitoring and control system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote monitoring and control system for controlling the operation of a load which operates by receiving power supply from a single-phase three-wire power supply line.

[0002]

2. Description of the Related Art A remote monitoring control system is used to remotely monitor and control the operation of a lighting device, an air conditioner, and the like.
FIG. 5 shows an example of this remote monitoring control system. In this remote monitoring and control system, a central control device 1 and a plurality of monitoring terminals 2 for monitoring the operation states of switches S _{1 to} S ₄ are provided.
And the control terminals 3 for controlling the loads L _{1 to} L ₄ are connected by a pair (two lines) of signal lines 4, and signals are transmitted between the central control device 1 and each terminal 2 via the signal lines 4. Perform transmission. Here, a unique address is set for each of the terminals 2 and 3.

As shown in FIG. 6, a transmission signal V _S transmitted from the central controller 1 to a signal line 4 includes a start pulse ST indicating the start of transmission and mode data M indicating a signal mode.
D, address of terminal 2 or 3 to access (8 bits)
Address data AD indicating the control data CD indicating the control content for controlling the load L ₁ ~L _4, checksum data C
S and a reply waiting period WT provided for returning a reply signal from the terminals 2 and 3.
_S is time-division multiplexed and transmitted as a pulse width modulated bipolar (± 24 V) signal.

Normally, when the address data of the transmission signal V _S received via the signal line 4 and the own unique address match, the control data of the transmission signal V _S is transmitted to each of the terminals 2 and 3. At the same time, the monitoring data is returned to the central controller 1 as a current mode return signal by short-circuiting the signal lines 4 in synchronization with the return wait period WT of the transmission signal V _S.

However, for example, the switch S₁~ S_FourIs operated
The load L ₁~ L_FourOperation control
The following interrupt processing is performed so that Now either
Switch S of terminal 2₁~ S_FourIs operated,
The terminal 2 transmits a transmission signal transmitted from the central control unit 1.
6B in synchronization with the start pulse ST of FIG.
The return signal Vi is sent back to the central control device 1. This interrupt signal
In the central control unit 1 receiving the signal Vi, the interrupt generation terminal
2 and access the terminal 2 to obtain monitoring data.
Let me reply. And based on the returned monitoring data
Corresponding load L ₁~ L_FourTo control terminal 3 for controlling
Control data to be generated and controlled by the corresponding control terminal 3.
Send data. In this way, urgent processing is quick
It is possible to do it.

[0006]

By the way, in the control terminal 3 in the above-mentioned remote monitoring and control system, the supply of power to the load L is controlled using a relay built in the control terminal 3 so that the load L can be controlled. Operation control is being performed. However, since this type of conventional built-in relay is of a one-circuit type, it can only cut off the power supply line. Therefore, power is supplied from a single-phase three-wire power supply line (for example, 200 V). There is a problem that it is difficult to control the operation of the load L to be received. Further, the address of the conventional control terminal 3 of this type is set in a binary system using a dip switch. For this reason, there has been a problem that a setting error easily occurs.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and has as its object to control the operation of a load which receives power from a single-phase three-wire power supply line and to set an address. It is an object of the present invention to provide a remote monitoring and control system that is unlikely to cause errors.

[0008]

According to the present invention, to achieve the above object, a two-circuit type latching relay for controlling the operation of a load and an address setting device for remotely setting an address of a terminal are provided. And a transmission / reception circuit for wirelessly transmitting a signal is provided in the terminal device. In addition, since this type of terminal is often installed in a distribution board, the terminal housing is divided into four module distribution board agreements so that this terminal can be easily installed in the distribution board. It is preferable to form a mounting groove formed in dimensions and detachable from the connecting plate in a lower part of the housing of the terminal.

[0009]

According to the present invention, by providing a two-circuit type latching relay in a terminal unit, the power supply is cut off to control the operation of the load, and the operation of the load receiving the power supply from a single-phase three-wire power supply line. By providing a terminal with a transmitter / receiver circuit that enables control and wirelessly transmits signals to and from the address setting device that remotely sets the address of the terminal device, the address setting device performs address setting and corrects setting errors. Less likely to occur.

[0010] Further, the terminal housing is formed to have a common size of a distribution board of four modules, and a mounting groove for detachably attaching to the connecting plate is formed in a lower portion of the housing of the terminal, so that the inside of the distribution board is provided. The terminal device is installed in the same manner as a device such as a breaker installed in the terminal, and the terminal device can be easily connected to the device such as the breaker and easily installed in the distribution board.

[0011]

1 to 4 show an embodiment of the present invention. The control terminal 3 of the remote monitoring and control system according to the present embodiment has the configuration shown in FIG.
As shown in, a plurality of latching relays Ry ₁ to Ry ₄ for controlling the operation of the load L, performs signal transmission between the central control unit 1 through a signal line 4, from the central controller 1 Latching relay Ry according to the control data of
Made from the transmission module 10 for controlling the operation of ₁ to Ry _4. Here, the control terminal device 3 includes a plurality of latching relays Ry _{1 to} Ry ₄ , so that a plurality of loads L
Can be controlled. Then, the latching relay Ry ₁ to Ry ₄ multiple contact points _{r 11 ~r 13, ..., r} 41 ~
comprising a r _43, 1 one contact r ₁₃ of each of the latching relay _{Ry 1 ~Ry 4, r 23,} r 33, with r ₄₃ as a contact for the operation confirmation, the transmission module 10 is the contact r _13,
The operation state of the load L is determined from the switching states of r ₂₃ , r ₃₃ , and r ₄₃ , and monitoring data is returned to the central control device 1.

FIG. 2 shows a specific circuit configuration of the transmission module 10. The transmission module 10 rectifies a transmission signal Vs transmitted from the central control device 1 via the signal line 4 and converts the DC voltage obtained by rectification by the diode bridge DB into a constant voltage. A constant voltage circuit 11 for supplying to each section, a receiving circuit 12 for receiving the transmission signal Vs, a memory 13 for storing a unique address as a terminal device, address data coincidence determination, control data reading, and load L drive control , A signal processing circuit 14 comprising a CPU for performing signal processing such as monitoring of the operation state of the load L, creation of reply data, and address setting change processing
And the signal line 4 based on the return data of the signal processing circuit 14.
Circuit 15 for sending a reply signal by setting the switch to a substantially short-circuit state
An oscillation circuit 16 for supplying a basic clock to the signal processing circuit 14, a reset circuit 17 for resetting the signal processing circuit 14 at the time of system startup or the like, and each of the latching relays according to a drive control signal from the signal processing circuit 14. Ry
A drive circuit 18 for driving the ₁ to Ry _4, a receiving circuit 19 for receiving the optical signal from the address setting unit, are constituted by a transmitting circuit 20 for transmitting an optical signal to the address setting device.

An address setting operation, which is a main operation of the transmission module 10 according to the present invention, will be described.
Since the operation other than the address setting operation of the transmission module 10 is the same as the operation of the conventional control terminal of the remote monitoring control system of this type, the description is omitted. Now, assuming that an address to be set is transmitted from the address setting device, a transmission signal including the set address data from the address setting device is received by the receiving circuit 19 and is transmitted to the signal processing circuit 1.
4 is input. At this time, the signal processing circuit 14 determines that the signal is a signal from the address setting device, and if it is correct, reads the set address data in the transmission signal and stores the address data in the memory 13. Thereby, the address setting of the control terminal 3 is completed. If address setting is performed using the address setting device in this way, setting errors are less likely to occur. At the time of the address setting, the transmission circuit 20 is used to perform a response for confirming whether the setting signal from the address setting device has been correctly received or a response indicating that the address setting has been completed. .

In the control terminal 3, the address set by using the address setting device can be confirmed. That is, when the receiving circuit 19 receives the address confirmation signal from the address setting device, the signal processing circuit 14 identifies this as the confirmation signal, reads the address data stored in the memory 13, and reads the address data. The data is transmitted from the transmission circuit 20 to the address setting device. The address setting device that has received the address data displays the address data on its own display unit. Therefore, the address set in the control terminal 3 can be confirmed by looking at the display contents. If this address confirmation operation is automatically performed even when the address is set, it is possible to set the address more reliably.

Further, the features of the control terminal 3 of the present embodiment and
This will be described below. Control terminal of this embodiment
In 3, the latching relay having three contacts as described above
Ry ₁~ Ry_Four, So a single-phase three-wire power supply
Control the operation of the load L that receives power from the
Can be. That is, each latching relay Ry₁~
Ry_FourTwo contacts r₁₁, R₁₂, ..., r₄₁, R₄₂Each
Insert the power line into both positive and negative poles.
The operation of the load L is controlled. In this way, turn off the power
When the operation control of the load L is performed, a single-phase three-wire power line
Operation control of the load L receiving power supply can be performed.
Because In addition, the method of cutting off the power supply is a single-phase two-wire system.
Load L that receives power from the power line
It goes without saying that it can be adopted.

FIG. 3 shows an appearance of the control terminal 3 of the present embodiment having the above-mentioned circuit configuration, and FIG. 4 shows an exploded perspective view thereof. The housing 30 of the control terminal 3 according to the present embodiment includes a box-shaped body 30a having an open upper surface, and a cover 30b attached to the body 30a. Is fitted. Here, the housing 30 of the control terminal 3 of the present embodiment is formed to have a common size of a distribution board of four modules. A plurality of mounting grooves 31 are formed at both lower ends of the body 30a so that the mounting grooves 31 can be detachably mounted on a connecting plate used when installing a device such as a breaker in the distribution board. That is, this type of control terminal 3 is often set in a distribution board. Therefore, as described above, the housing 30 of the control terminal 3 is formed to have the common size of the distribution board of four modules, and the connecting groove is provided in the body 30a so as to be detachable from the connecting plate. The control terminal 3 can be installed in the distribution board in the same manner as these devices, and the control terminal 3 can be easily installed in the distribution board.

In the housing 30, printed circuit boards 32 ₁ and 32 ₂ on which the circuit components are mounted are housed.
Here, the printed circuit board 32 ₁ disposed on the lower side to implement the latching relay Ry ₁ to Ry _4, are mounted to the other circuit components on the printed circuit board 32 ₂ is set to the upper. For example, printed circuit board 32 in _two transceiver circuits 19,
Twenty light emitting diodes LD and photodiode PD are mounted. The upper and lower printed circuit boards 32 ₁ ,
32 ₂ is coupled with a tape cable 33.

The cover 30b The Yes forms the terminal portion 34 ₁ respectively connecting the power supply line of the power supply line and the source side is connected to the load L at one end, a terminal portion 34 ₂ for connecting the signal line 4
Is formed at the other end. The terminal unit 34 ₁ is formed in two stages, the terminal cover 35 for applying an insulation to the terminal unit 34 ₁ in the upper attached. The terminal cover 35 is a rotary shaft portion 35a formed at both ends, mounted openably and fitted to the terminal portion 34 ₁ of the arc-shaped formed on the upper bearing portion 34a. Here, the bearing 3 of the rotating shaft 35a
A notch 35b is formed at the center of the terminal cover 35 to facilitate attachment to the terminal 4a. That is, the cut 3
The terminal cover 35 is bent by forming 5b. If this closes the terminal portion 34 ₁ in the terminal cover 35, terminal cover 35 is placed on the stepped portion 34b formed in an upper portion of the inner peripheral edge of the terminal portion 34 _1. The closed state of the terminal cover 35 is held by the holding rib 34c. In other words, the width of the portion of the holding rib 34c where the escape recess 35c is formed is set to be slightly larger than the width between the inner ends of the holding ribs 34c formed on both sides, and the terminal cover 35 is attached to the holding rib 34c. In this state, the recess 35c is held between the holding rib 34c and the step 34b so that the terminal cover 35 is kept closed. Further, the terminal cover 35 has a structure capable of holding an open state. That is, a ridge 34d is formed on the upper surface of the bearing portion 34a.
d and the center side of the cover 30b.
5 is kept open. Specifically, the terminal cover 35 is rotated to open and stands upright,
Push in the terminal cover 35 by the width of the notch formed inside a (however, when the control terminal 3 is installed in the state shown in the figure, the terminal cover 35 falls down due to the weight of the terminal cover 35). The cut portion is held between the ridge 34d and the side surface of the central portion of the cover 30b, and the closed state of the terminal cover 35 is held.

[0019] The respective terminal portions 34 _1, 34 connecting terminal 36 ₁ is attached to the _2, 36 ₂ is a so-called screw-tightening type, the terminal plate 36a, retainer is screwed into the terminal plates 36a Backed And the terminal screw 36b. Here, the connection terminals 36 ₁ each, 36 ₂ of the terminal plate 36a is Shimete attached either to the terminal unit 34 _1, 34 _2, connected to the printed circuit board 32 _first connecting terminal 36 ₁ of the terminal plate 36a is read carried by a line 36c, also connected to the printed circuit board 32 _{and second} connecting terminals 36 ₂ of the terminal plate 36a has a terminal plate 36a to be inserted into printed circuit board 32 in the _second insertion hole 32a
36d is soldered.

A transmission / reception window 37 for the light emitting diode LD and the photodiode PD is formed in the center of the upper surface of the cover 30b, and a filter 37a is attached to the transmission / reception window 37. Here, transmission and reception between the control terminal 3 and the address setting device of the present embodiment are performed by infrared rays, and a filter that transmits only infrared rays is used as the filter 37a.

[0021]

According to the present invention, as described above, since the two-circuit type latching relay is provided in the terminal device, the operation of the load can be controlled by cutting off the power supply, and the power supply can be performed from the single-phase three-wire power supply line. It can also control the operation of the load that is supplied by the address setting device. By providing a transmission / reception circuit that wirelessly transmits signals to and from the address setting device that remotely sets the address of the terminal, the address setting can be performed using the address setting device. And setting errors are less likely to occur.

Further, when the housing of the terminal is formed to have a common size of a distribution board of four modules, and a mounting groove to be detachable from the connecting plate is formed in a lower portion of the housing of the terminal.
The terminal can be installed in the same manner as a device such as a breaker installed in the distribution board. Therefore, the terminal device can be easily installed in the distribution board by being connected to the device such as the breaker.

[Brief description of the drawings]

FIG. 1 is a schematic circuit diagram of a control terminal according to an embodiment of the present invention. .

FIG. 2 is a circuit diagram of the transmission module according to the first embodiment;

FIGS. 3A to 3C are plan views of the control terminal device according to the first embodiment;
It is a side view and a front view.

FIG. 4 is an exploded perspective view of the control terminal device.

FIG. 5 is a system configuration diagram of a remote monitoring control system.

FIG. 6 is an explanatory diagram showing a format of a transmission signal of the above.

[Explanation of symbols]

1 the central control unit 3 control terminal 4 signal line 19 receiving circuit 20 transmitting circuit 30 housing 31 attachment groove Ry ₁ to Ry ₄ Latching Relay L load

Claims (2)

(57) [Claims] 1. A plurality of terminals are connected to a central controller via two signal lines, and terminals to which respective unique addresses are set are specified by address data of a transmission signal, and the central controller is individually connected. To control the operation of the load by the terminal device according to the control data set in the transmission signal, and to return monitoring data indicating the operation state of the load from the terminal device in a reply waiting period provided in the transmission signal. To monitor the operation status of the load and control the operation of the load.
A remote monitoring and control system, wherein a transmission / reception circuit for wirelessly transmitting a signal between a circuit type latching relay and an address setting device for remotely setting an address of the terminal device is provided in the terminal device. 2. The terminal device according to claim 1, wherein a housing of the terminal is formed to have a common size of a distribution board of four modules, and a mounting groove detachably formed in a connecting plate is formed in a lower portion of the housing of the terminal. The remote monitoring and control system according to claim 1, wherein