JP3261380B2 - Monitoring terminal for 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 method for transmitting monitoring data generated by operating a switch to a control terminal using a transmission signal from a main control device. The present invention relates to a monitoring terminal device of a remote monitoring and control system that controls a load by controlling the load.

[0002]

2. Description of the Related Art Conventionally, a remote monitoring control system having a configuration as shown in FIG. 13 has been known. The main control device 41 has a plurality of monitoring terminals 4 for monitoring the operation of the switches S _{1 to} S ₄ via a two-wire signal line Ls.
2, the load L ₁ a plurality of the control terminal unit 4 for controlling the ~L ₄
3 etc. are connected. Individual address data is set in the monitoring terminal 42 and the control terminal 43, respectively.
The main controller 41 recognizes the monitoring terminal 42 and the control terminal 43 using the address data.

The main controller 41 sends out a transmission signal Vs having a format as shown in FIGS. 14A and 14B to the signal line Ls. That is, the start pulse S indicating the start of signal transmission
T, mode data signal indicating the signal mode MD, the address data signal AD for transmitting address data for calling the monitoring terminal 42 and control terminal 43 to each other, the control data for controlling the load L ₁ ~L ₄ A multi-pole comprising a control data signal CD to be transmitted, a checksum data signal CS for detecting a transmission error, and a signal return period WT which is a time slot for receiving a return signal from the monitoring terminal 42 or the control terminal 43. (± 24 V) time-division multiplexed signal, and data is transmitted by pulse width modulation.

In each of the monitoring terminals 42 and the control terminals 43, when the address data of the transmission signal Vs received via the signal line Ls matches the set address data, the control data of the transmission signal Vs is transmitted. At the same time, the monitoring data signal is returned in the current mode (a signal transmitted by short-circuiting the signal line Ls via an appropriate low impedance) in synchronization with the signal return period WT of the transmission signal Vs.

The main controller 41 sets the mode data signal MD to a dummy mode, and a dummy transmission signal having an empty address not set in each of the monitoring terminal 42 and the control terminal 43 as address data. Is provided. The main control device 1 has a configuration shown in FIG.
After detecting the monitoring terminal 42 that has generated the interrupt signal when receiving the interrupt signal Vi as shown in (c), there is also provided an interrupt processing means for accessing the monitoring terminal 42 and returning the monitoring data. . That is, the dummy signal is normally transmitted to the signal line Ls by the dummy signal transmitting means, and the interrupt signal V generated from the monitoring terminal 42 is transmitted.
When i is detected in synchronization with the start pulse signal ST of the dummy transmission signal, the main controller 4
From 1, the transmission signal Vs in which the mode data signal MD is set to the address confirmation mode is transmitted. Interrupt signal Vi
Receives the transmission signal Vs in the address confirmation mode, and returns the address data set in the monitoring terminal 42 in synchronization with the signal return period WT of the transmission signal Vs. In this way, the main controller 41 obtains the address of the monitoring terminal that has generated the interrupt signal Vi, and accesses the monitoring terminal 42 using the obtained address, thereby obtaining the monitoring terminal 4.
2 receives the monitoring data.

In the main control unit 41, based on the monitoring data returned from the monitoring terminal 42, the switches S _{1 to} S
_The load L for which the correspondence to ₄ is set in advance
Thereby creating a control data transmitting ₁ ~L ₄ to the control terminal 43 connected, transmits a transmission signal Vs containing the control data to the signal line Ls, the corresponding control terminal unit 4
3 to control the loads L _{1 to} L ₄ .

By the way, as a monitoring terminal unit 42, as shown in FIG. 15, a case 10 having a handle 11 of the switch S ₁ to S ₄ which is press operation of the front, the case 10
Cover 1 provided with an engagement claw 12a which is detachably engaged with the concave and convex with respect to the front surface of the case 10.
2 is known. Case 10 is formed by coupling the body 10 ₁ and the cover 10 _2. The engagement claw 12a is provided with an engagement protrusion 10 provided on a side surface of the case 10.
a. The makeup cover 12 includes a handle 11
Has a window 12b (see FIG. 4) penetrated so that the front part of the decorative cover 12 can be inserted. It is stuck so as to cover it. That is, the insertion window 12b is covered by the cover sheet 13. Since the cover sheet 13 is flexible, the pushing operation of the handle 11 can be performed by pressing the cover sheet 13. A step is formed in a portion of the cover sheet 13 corresponding to the periphery of the insertion window 12b, so that a portion of the cover sheet 13 corresponding to the insertion window 12b is more easily bent.
The pushing operation of the handle 11 is easier. Between the front and the cover sheet 13 of the handle 11, name card 14 notation associated with the switch S ₁ to S ₄ is made
Is inserted. In short, the name card 14 on which the load names and the like corresponding to the switches S _{1 to} S ₄ are written, the handle 11 of each switch S _{1 to} S ₄ and the transparent cover sheet 1
3 and is held between them.

[0008] The case 10 is formed in a size corresponding to three embedded wiring devices of unit dimensions standardized by JIS or the like, and can be constructed using a mounting frame for the wiring device. Is provided on the side surface so as to be connected to the mounting frame as described above. That is, the rear portion of the case 10 is mounted in a manner embedded in a mounting surface such as a wall surface. Therefore, the decorative plate 15 (see FIG. 5) is provided so as to cover the embedded portion of the case 10 on the mounting surface. The decorative plate 15 is usually connected to the mounting frame. At the center of the decorative plate 15 is a decorative cover 1
An opening window 15a for exposing 2 is formed.

[0009]

By the way, a plurality of monitoring terminals 42 may be arranged adjacent to each other. In such a case, a signal line Ls is connected to each monitoring terminal 42. Therefore, there is a problem that the connection work is troublesome.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a monitoring terminal of a remote monitoring and control system that facilitates a connection operation with a signal line when a plurality of signal lines are arranged adjacent to each other. To provide equipment.

[0011]

According to the first aspect of the present invention, in order to achieve the above object, a plurality of terminals are connected to a main controller via a signal line to transmit address data and control data. Signals are transmitted from the main controller to each terminal in a time-division multiplexing manner, and control data generated based on monitoring data input to the monitoring terminal by operating a switch is associated with address data. One set of signal terminals to which signal lines are connected and two sets of connectors commonly connected to the signal terminals are used in a remote monitoring and control system that transmits to the control terminal and controls the load by the control terminal. Is provided on the back of the case. According to this configuration, since one set of signal terminals to which signal lines are connected and two sets of connectors commonly connected to the signal terminals are provided on the rear surface of the case, a plurality of monitoring terminals are provided. When arranged adjacently, a signal line is connected to a signal terminal for one monitoring terminal, and a connection having plugs connectable to a connector at both ends for another monitoring terminal. It is only necessary to sequentially connect the monitoring terminals using a line. When a plurality of monitoring terminals are arranged adjacent to each other, the connection work can be facilitated.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The basic configuration of the present embodiment is the same as the conventional configuration. In this embodiment, as shown in FIG. 3 and FIG.
Is provided. That is, the decorative cover 12 is provided with engaging claws 12a having a substantially L-shaped cross section protruding rearward on both side sides, and a notch-shaped detaching groove 12c at the center of one side where the engaging claws 12a are not provided. . As shown in FIG. 5, when the flat tool 17 such as a flathead screwdriver is inserted from the front side of the decorative plate 15, the removal groove 12 c is formed so that the tip of the tool 17 reaches the rear surface of the decorative cover 12. Is formed. That is, if a force is applied to pry the makeup cover 12 forward with the tool 17 inserted, the engagement between the engaging claw 12a of the makeup cover 12 and the coupling protrusion 10a of the case 10 is released, and the makeup is removed. Cover 12
Can be removed from the case 10.

On the front surface of the case 10, switches S _{1 to} S
₄ and the correspondence have been set load L ₁ operating state of ~L ₄ (on-off state) indicator 16a consisting emitting diode for displaying a, 16b is, the switches S ₁
Two by two in response to the handle 11 of the to S ₄ are arranged. Two indicator lights 16a, 1 corresponding to each handle 11
One 6b is lit when the load L ₁ ~L ₄ is ON, the other is the load L ₁ ~L ₄ is turned in the off. In the decorative cover 12, through holes 12d are formed so as to correspond to the indicator lights 16a and 16b. The cover sheet 13 is provided so as to cover substantially the entire front surface of the decorative cover 12. However, since the cover sheet 13 is transparent, blinking of the indicator lights 16 a and 16 b can be visually recognized from the front side of the decorative cover 12.

On the inner peripheral surface of the rectangular insertion window 12b into which the front portion of the handle 11 is inserted in the decorative cover 12, a fall prevention projection 12e is formed as shown in FIG. The fall prevention protrusions 12e are provided on both sides of the inner peripheral surface of the insertion window 12b, and are provided on an upright surface such as a wall surface.
When it is attached, it extends from one end on the lower end side to the vicinity of the center of each side surface. In addition, the fall prevention projection 12
e is formed behind the front surface of the decorative cover 12 and forms a gap for holding the name card 14 between the decorative cover 12 and the cover sheet 13. The drop prevention protrusion 12e is provided with a detachable inclined surface 12f that is inclined upward so as to increase the distance from the cover sheet 13 to a portion that becomes the upper end when the case 10 is attached as described above. 13
Are formed on a surface facing the above. Further, as shown in FIG. 7, the inner peripheral surface of the insertion window 12b, which is the upper end when the case 10 is attached as described above, has a small distance from the rear surface of the decorative cover 12 upward. A detachable inclined surface 12h is formed, and a notch 12g is formed at the center of the inclined surface.

Therefore, when the name card 14 is replaced, the name card 14 is held between the fall prevention protrusion 12e and the cover sheet 13 even if the decorative cover 12 is removed from the case 10, so that the decorative The name cart 14 does not fall off as soon as the cover 12 is removed from the case 10. In addition, the detachable inclined surface 12f,
12h, the fall prevention protrusion 12
e, when removing the name card 14 held between the cover sheet 13 and the detachable inclined surfaces 12f, 12h
If the name card 14 is slid using the as a guide, the work of attaching and detaching the name card 14 can be easily performed. Furthermore, since the notch 12g is formed, the name card 1
When it is difficult to remove the name card 14, the name card 14 can be taken out by inserting a tool into the notch 12g.

As described above, the indicator lights 16a and 16b are exposed on the front surface of the case 10, and the decorative cover 12 is mounted on the front surfaces of the indicator lights 16a and 16b. In the exposed portion on the front surface, the indicator lights 16a and 16b are not provided with a protective cover.
Therefore, when attaching / detaching the makeup cover 12, the indicator light 1
A load may act on 6a and 16b. Indicator light 16
a and 16b are formed by light emitting diodes, and are mounted on a printed circuit board disposed in the case 10, so that when a load is applied to the indicator lights 16a and 16b, the lands on the printed circuit board will be applied. Problems such as peeling of the land due to the application of a load occur. Therefore, as shown in FIG. 8, protection projections 10c are provided on the front surface of the case 10 at portions corresponding to both side surfaces of the indicator lights 16a and 16b. The surface of the protection protrusion 10c facing the indicator lights 16a, 16b is formed to be larger than the indicator lights 16a, 16b. Therefore, the load that is going to act on the indicator lights 16a and 16b from the decorative cover 12 is received by the protective projection 10c, and as a result, the indicator light 16
No load acts on a and 16b.

As shown in FIGS. 9 and 10, the case 10 is mounted on a mounting frame 30 for three large squares which are standardized for embedded wiring devices in accordance with JIS standards and Japanese wiring device industry association standards. It is constructed in the form that it is attached. Mounting frame 30
Have holding holes 33a, 33b on both side pieces 32a, 32b surrounding the opening window 31 for engagement with coupling claws 10a protruding from side edges of the case 1, respectively. One side piece 32a has a side piece An operation piece 34 that can bend so as to change the distance from the operation piece 32a is formed. When attaching the case 1 to the attachment frame 30, the case 1 is attached to the attachment frame 30 from behind the attachment frame 30.
If it is pressed to 0, the operation piece 34 bends and the case 1 can be fitted to the mounting frame 30, and at this time, the front part of the case 10 projects from the opening window 31. On the other hand, in order to remove the case 1 from the mounting frame 30, the operation piece 34 may be pryed with a driver or the like. In the connecting pieces 35a, 35b surrounding the opening window 31 and orthogonal to the side pieces 32a, 32b, elongated holes 3 into which box screws for connecting the mounting frame 30 to the switch box are inserted.
6 and a screw hole 37 into which a plate screw for attaching the decorative plate 15 covering the front surface of the attachment frame 30 is provided. Further, the connecting pieces 35a and 35b are screwed with screws inserted through the elongated holes 36, and one end of a scissor metal fitting for clamping the periphery of the mounting hole formed in the wall panel or the like with the mounting frame 30. Is also formed.

A printed circuit board on which a circuit as shown in FIG. 11 is mounted is housed in the case 10. Processing of the transmission signal is performed by a signal processing unit 21 formed of a dedicated integrated circuit containing a microprocessor. The signal processing unit 21 includes up to four switches S _{1 to} S ₄
Can be connected, and a function of turning on or off the loads L _{1 to} L ₄ by operating the switches S _{1 to} S ₄ can be set by the function data stored in the storage unit 22. It has become. The address data is also stored in the storage unit 22. E is stored in the storage unit 22
An EPROM is used, and the contents can be rewritten through the signal processing unit 21. The power of the monitoring terminal 42 is obtained by full-wave rectifying and stabilizing the transmission signal on the signal line Ls connected to the signal terminals T ₁ and T _2. Power supply circuit 23 is provided. Transmission signal is input via the transistor Q _1, the return signal is sent to the signal line Ls as a signal of the current mode using the transistors Q ₂ and resistor R _2. Further, a crystal oscillator X that determines the clock cycle of the signal processing unit 21 and a reset circuit 24 that resets the signal processing unit 21 when the power is turned on are connected to the signal processing unit 21.

The contents of the storage unit 22 are set by a wireless signal using infrared rays from a setting unit 44 (see FIG. 13) provided outside. The setting unit 44 is configured to set, confirm, and correct the function data and the address data stored in the storage unit 22. The signal processing unit 21 responds by transmitting wireless signals in each mode. Processing is performed. A wireless reception unit 25 and a wireless transmission unit 26 are connected to the signal processing unit 21 for transmission and reception of wireless signals. Wireless receiver 25 is made of a series circuit of the light receiving elements P and the resistor R _1, such as a PIN photodiode which is connected across the power source, a connection point of the light receiving elements P and resistor R ₁ to the signal processing unit 21 Connected. Wireless transmission unit 26, the emitter of the transistor Q ₃ for the drive - and a light emitting element L which a resistor R ₃ connected in series to the collector made of light emitting diodes.

The setting device 43 is used at a relatively short distance in order to set function data and address data for each monitoring terminal device 42. Therefore, the setting device 43 is hardly affected by disturbance light. Even if the noise component is not removed by waveform shaping, the operation is practically no problem. Further, a signal level required for the signal processing unit 21 can be secured without performing amplification. As described above, by adopting the simple circuit configuration, the area occupied by the wireless receiving unit 25 on the printed circuit board is significantly reduced. For example, as a circuit for removing and amplifying noise, a circuit configuration as shown in FIG. 12 can be considered. This wireless receiving unit 25
Via the capacitor C ₁ connects the base of transistor Q ₄ to the connection point of the series circuit of the light receiving elements P consisting IN photodiode and a resistor R _1, further transistors Q ₄
To the collector of the transistor Q ₅ via the capacitor C _2.
Is connected to the base. That is, when a wireless signal to the light receiving element P is incident, the transistor Q ₄ is turned on by momentarily current flows to the base of the transistor Q ₄ through capacitor C _1, the transistor Q ₅ charges the capacitor C ₂ is discharged It turns on for a certain period of time. Therefore, a pulse having a constant width can be output regardless of the pulse width of the wireless signal, and the signal is amplified. However, FIG.
The number of components is clearly larger than that of the wireless receiving unit 25 of the first embodiment. Even if such a complicated circuit is not used, there is no problem in practical use. By adopting the circuit configuration shown in FIG. It is possible to reduce the size by reducing the occupied area.

As shown in FIG. 3, the wireless signal is transmitted and received through a transmission / reception unit 27a provided on the front of the case 10. At the position corresponding to the transmitting / receiving section 27a, the decorative cover 12
Is provided with a protective cover 27b through which infrared light can pass.

As the signal terminals T ₁ and T _2, as shown in FIG. 1, terminals with screws exposed on the back surface of the case 10 are used. Further, two sets of connectors 18a and 18b are provided which are connected in common with the signal terminals T ₁ and T ₂ . Case 1
0 are arranged adjacent to each other, the signal lines L
It is necessary to send and wire s, and such sending wiring is performed using connectors 18a and 18b. That is, as shown in FIG. 2, a connection line 19 having plugs 19a and 19b at both ends detachably coupled to the connectors 18a and 18b is used to connect between the connectors 18a and 18b provided in each case 10. If connected one after another, the signal line Ls
Can be performed. By employing such a configuration, the time for connecting the signal lines Ls is greatly reduced.

[0023]

According to the present invention, since one set of signal terminals to which signal lines are connected and two sets of connectors commonly connected to the signal terminals are provided on the rear surface of the case, a plurality of monitoring terminals are provided. When arranging the terminals adjacent to each other, connect the signal line to the signal terminal for one monitoring terminal, and connect the plug connectable to the connector to both ends for the other monitoring terminals. It is only necessary to sequentially connect the monitoring terminals using the provided connection lines, and when arranging a plurality of monitoring terminals adjacent to each other, it is possible to facilitate the connection work. Has advantages.

[Brief description of the drawings]

FIG. 1 is a rear view showing an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a usage example of the above.

FIG. 3 is an exploded perspective view showing the same.

FIG. 4 is a perspective view of a decorative cover used in the embodiment.

FIG. 5 is a perspective view of a main part of the above.

FIG. 6 is a perspective view of a main part of the above.

FIG. 7 is a sectional view of a main part of the above.

FIG. 8 is a perspective view of a main part of the above.

FIG. 9 is a front view of the same.

FIG. 10 is a side view of the same.

FIG. 11 is a circuit diagram of the same.

FIG. 12 is a main part circuit diagram of a comparative example.

FIG. 13 is a configuration diagram of a remote monitoring control system.

FIG. 14 is an explanatory diagram of the operation of the remote monitoring control system.

FIG. 15 is an exploded perspective view showing a conventional example.

[Explanation of symbols]

10 Case 18a, 18b connector 41 Main controller 42 monitoring terminal 43 for controlling terminal units L ₁ ~L ₄ load Ls signal lines S ₁ to S ₄ switches T _1, T ₂ signal terminal

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H04Q 9/00-9/16

Claims (1)

(57) [Claims] A plurality of terminals are connected to a main controller via signal lines, and transmission signals including address data and control data are transmitted from the main controller to each terminal in a time division multiplexing manner. Remote monitoring for transmitting control data generated based on monitoring data input to a monitoring terminal by operating a switch to a control terminal associated with address data and controlling a load by the control terminal; Monitoring of a remote monitoring and control system, comprising a set of signal terminals connected to signal lines and two sets of connectors commonly connected to the signal terminals, which are used in the control system and are provided on a rear surface of the case. Terminal.