JP2642676B2 - Remote monitoring and control system - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a remote monitoring and control system provided with a plurality of remote monitoring and control devices for accessing a terminal from a central control device and transmitting data in a time-division multiplex manner. It is about.

[Related Art] Conventionally, a remote monitoring and control device that accesses a terminal device from a central control device and performs time division multiplex transmission of data is
As shown in FIG. 4, a central control unit 1, a plurality of monitoring terminals 2, a control terminal 3, and a unique address are set.
The relay terminal 7, the external interface terminal 8, and the pattern setting terminal 9 are connected by a pair of signal lines 4, and the transmission signal Vs transmitted from the central controller 1 to the signal line 4 is the fifth signal. As shown in FIG. 2A, a start pulse signal ST indicating the start of signal transmission, a mode data signal MD indicating a signal mode, and an address data signal transmitting 8-bit address data for calling the terminals 2, 3, 7 to 9. AD, load L ₁
Control data signal C for transmitting control data for controlling the ~L ₄
D, a multi-pole (± 24 V) time-division multiplexed signal comprising a checksum data signal CS and a return wait signal WT for setting a return period from the terminals 2, 3, 7 to 9; It is to be transmitted. Each terminal 2,
In 3,7-9, the transmission signal Vs received via the signal line 4
The control data of the transmission signal Vs is taken in when the address data of the self-address data coincides with its own unique address data, and the monitoring data signal is synchronized with the return wait signal WT of the transmission signal Vs by the current mode signal (between the signal lines 4). (A signal that is short-circuited through an appropriate low impedance). The central control unit 1 also includes a dummy signal transmitting means for constantly transmitting a dummy transmission signal in which the mode data signal MD is set to the dummy mode, and any one of the monitoring terminal 2 or the relay terminal 7 and the external interface terminal 8 , The fifth returned from the pattern setting terminal 9
When an interrupt signal Vi as shown in FIG. 7B is received, the interrupt generation terminals 2, 7 to 9 are detected and the terminals 2, 7 to 9 are detected.
And an interrupt processing means for accessing the 9 to return the monitoring data. In the central controller 1, the monitoring terminal 2 or the relay terminal 7, the external interface terminal 8, and the pattern setting terminal 9 return the monitoring data returned to the central controller 1 as described above. In addition to creating control data to be transmitted to the control terminal 3 for controlling the corresponding loads L _{1 to} L ₄ , the control data is transmitted to the control terminal 3 via the signal line 4 in a time-division multiplex manner and the load is controlled. and controls the L ₁ ~L _4.

The relay terminal 7 is a terminal that relays data of an infrared wireless data transmission system including a wireless transmitter 10, a wireless receiver 11, and a wireless signal line 12, and has a unique address set therein.
The wireless receiver 11 receives a wireless signal composed of an optical signal transmitted from the wireless controller 11, receives the received data via the wireless signal line 12, and transfers the data to the central controller 1. ing. FIG. 6 shows the configuration of the relay terminal 7, and the wireless receiver 11
A wireless data receiving circuit 13 comprising a data receiving circuit 13a and a signal processing circuit 13b for receiving data from the
It is formed by a transmission signal receiving circuit 14a for returning data received by the wireless data receiving circuit 13 to the central control device 1, and a terminal device circuit 14 including a signal processing circuit 14b. Also, a wireless signal Vw composed of an optical signal transmitted from the wireless transmitter 10 includes a start pulse signal, an address data signal transmitting address data set by a unique address setting switch, and a load control switch.
And a data signal for transmitting monitoring data of Sc, Sc ′. The data transmitted by this wireless signal Vw is received by the wireless receiver 11 and sent to the relay terminal 7 via the signal line 12, Upon receiving the data, the relay terminal 7 sets the transmitted address data as a unique address, generates an interrupt request signal Vi, and transmits the control data signal CD 'when accessed by the central controller 1. The monitoring data of the load control switch is returned. The central controller 1 forms control data for controlling the corresponding load L based on the monitoring data returned from the relay terminal 7, transmits the control data to the control terminal 3, and transmits the load L corresponding to the wireless transmitter 10. Is controlled remotely.

The external interface terminal 8 is a terminal that performs data transmission with the external control device 11, and the pattern setting terminal 9 sends pattern control data input from the data input unit 12 to the central control device 1. It is a terminal that transfers. The monitoring terminal 2 and the control terminal 3 provided in the distribution board 6 or the relay control panel 6a have a distribution board agreement size, and the control output thereof is used to control the remote control relay for load control. (Latching relay that can be turned on and off also by a hand switch) 5 is controlled.

By the way, in the above-described remote monitoring and control device, the number of unique addresses that can be set for each terminal device 2, 3,... Is determined by the number of bits of the address data (for example, when the address data is 8 bits, the number of unique addresses is 256). Therefore, when monitoring and controlling a large number of switches and loads, as shown in FIG.
A remote monitoring and control system with a large system scale is constructed by adding X ₁ and X ₂ together.

[Problems to be Solved by the Invention] However, when a plurality of remote monitoring control devices X ₁ and X ₂ are provided side by side as in the above-described conventional example, wireless signals of adjacent remote monitoring control devices X ₁ and X ₂ are used. There was a problem that Vw interfered and erroneous remote control was performed. For example,
Wireless signals Vw transmitted from the wireless transmitter 10 corresponding to the wireless receiver 11 of the remote monitoring and control device X ₁ is,
May be received even wireless receiver 11 of the remote monitoring and control device X ₂ which are disposed adjacent to the load of the same channel for both remote monitoring and control device X _1, X ₂ is a malfunction that results in a controlled simultaneously There was a problem that it easily occurred.

The present invention has been made in view of the above points, and its purpose is to prevent malfunction due to interference of wireless signals of adjacent remote monitoring and control devices,
In addition, it is an object of the present invention to provide a remote monitoring and control system with a simple configuration and low cost by sharing a wireless receiver among a plurality of remote monitoring and control devices.

[Means for Solving the Problems] A remote monitoring and control system according to the present invention includes a central control device,
A switch monitoring terminal and a load control terminal to which a unique address is set are connected by a pair of signal lines, and each terminal is accessed from the central control unit to perform time division multiplex transmission of monitoring data and control data. In this way, a wireless transmitter for transmitting a wireless signal for transmitting address data and monitoring data of the load control switch in which a unique address is set, a wireless receiver for receiving a wireless signal, and data received by the wireless receiver A remote monitoring and control system provided with a plurality of remote monitoring and control devices provided with a relay terminal for returning the data to the central control device, a wireless data receiving circuit for receiving data from a wireless receiver, and a wireless data receiving circuit for receiving data from a wireless receiver. And the terminal circuit that returns the collected data to the central control unit of each remote monitoring and control unit. In addition to forming a relay terminal, a page data setting unit is provided in the wireless transmitter to transmit a wireless signal to which page data is added from the wireless transmitter, and data of the wireless signal is transmitted to any remote monitoring control device according to the page data. A transfer control means for selecting whether to transfer to the central control device is provided in the relay terminal.

[Operation] The present invention is configured as described above. The central control unit accesses the switch monitoring terminal and the load control terminal to perform time division multiplex transmission of the monitoring data and the control data. In a remote monitoring and control system provided with a plurality of remote monitoring and control devices configured to return monitoring data of a control switch to a central control device via a wireless transmitter and a wireless receiver and a relay terminal,
A relay terminal is formed by a wireless data receiving circuit and a terminal circuit for returning received data to a central control unit of each remote monitoring and control device, and a wireless signal is transmitted from a wireless transmitter to which a page signal is added. With
Since the relay terminal is provided with a transfer control means for selecting which remote monitoring and control device to transfer the data by the wireless signal to the central control device according to the page data, the wireless signal of the adjacent remote monitoring and control device is provided. In addition, it is possible to provide a remote monitoring and control system with a simple configuration and low cost by sharing a wireless receiver among a plurality of remote monitoring and control devices.

FIG. 1 shows an embodiment of the present invention, in which a central control unit 1, a switch monitoring terminal 2 and a load control terminal 3 in which a unique address is set are connected to a pair of signal lines 4. The central control unit 1 accesses the terminals 2 and 3 so that the monitoring data and the control data are transmitted in a time-division multiplex manner. A unique address is set, and the address data and the load control switches Sc and Sc 'are set. A wireless transmitter 10 for transmitting a wireless signal Vw for transmitting monitoring data, a wireless receiver 11 for receiving a wireless signal Vw, and receiving data received by the wireless receiver 11 via a signal line 12. In a remote monitoring and control system similar to the conventional example in which a plurality of remote monitoring and control devices X ₁ and X ₂ provided with a relay terminal 7 returning to the central control device 1, a wireless receiver 11 is provided.
Data receiving circuit 13 for receiving data from
And a terminal device circuit 14 for returning the data received by the wireless data receiving circuit 13 to the central control device 1 of each of the remote monitoring and control devices X ₁ and X ₂ to form a relay terminal 7. Page data setting section (setting pin of signal processing circuit formed using CPU to “H” or “L”)
While transmitting a wireless signal Vw obtained by adding the page data from the wireless transmitter 10 is provided to transfer data to the central control unit 1 of which remote monitoring and control device X ₁ to X ₄ and by a wireless signal Vw in accordance with the page data The relay control unit 7 is provided with a transfer control means for selecting either of them. FIG. 2 shows a configuration of a relay terminal unit 7, the wireless data receiving circuit 13 is constituted by the transmission signal receiving circuits 14a ₁ to 14A ₄ and the signal processing circuit 14b ₁ ~14b consisting ₄ terminal circuit 14 , the transfer control means is formed by the signal processing circuit 13b ₁ 13 b ₄ which page data is set, the signal processing circuit 13b ₁
In 13 b _4, the terminal circuit 14 takes in the address data C ₀ -C ₇ and the data D ₀ to D ₇ of the received data when the page data of the data received and set the page data match The terminal circuit 14
Is transferred to the central control device 1.

Figure 3 shows one example of a wireless signal Vw, a start pulse signal ST ', 8-bit address data C ₀ ~
An address data signal AD 'for transmitting C _7, and the page data signal PD to transmit two bits of page data C _8, C _{9, 8}
A data signal CD ′ transmitting bit data D _{0 to} D ₇ and C ₀
Of which is formed by the check data ₀ consisting inverted data, in the embodiment, it is adapted to transmit repeatedly inverted data _{0 ~ 9,} 0 _{~ 7,} C ₀ in order to prevent transmission errors.

Hereinafter, the operation of the embodiment will be described. Now, the page data C ₈ and C ₉ are added to the wireless signal Vw transmitted from the wireless transmitter 10, and the remote means based on the page data C ₈ and C ₉ in the transfer means of the relay terminal 7. Since it is selected whether to transfer the data to the central control device 1 of the supervisory control devices X _{1 to} X ₄ , the data transmitted from one wireless transmitter 10 is transmitted to the central control devices of the plurality of supervisory control systems X _{1 to} X _4. 1 and the wireless signal Vw
This can prevent malfunction due to interference. Further, the wireless receiver plurality of remote monitoring and control device X ₁ to X ₄
, The configuration can be simplified and the cost can be reduced. In the actual monitoring and control system, for example, if the page “0” is set to the lighting control system and the page “1” is set to the air-conditioning control system,..., An independent system can be constructed for each control object. Maintenance and inspection can be performed easily.

[Effects of the Invention] The present invention is configured as described above, and accesses the switch monitoring terminal and the load control terminal from the central control device so that the monitoring data and the control data are time-division multiplexed, In a remote monitoring and control system provided with a plurality of remote monitoring and control devices for returning monitoring data of a load control switch to a central control device via a wireless transmitter and a wireless receiver and a relay terminal,
A relay terminal is formed by a wireless data receiving circuit and a terminal circuit for returning received data to a central control unit of each remote monitoring and control device, and a wireless signal is transmitted from a wireless transmitter to which a page signal is added. With
Since the relay terminal is provided with a transfer control means for selecting which remote monitoring and control device to transfer the data by the wireless signal to the central control device according to the page data, the wireless signal of the adjacent remote monitoring and control device is provided. Therefore, it is possible to provide a remote monitoring and control system with a simple configuration and low cost by sharing a wireless transmitter among a plurality of remote monitoring and control devices.

[Brief description of the drawings]

FIG. 1 is a schematic block diagram of one embodiment of the present invention, FIG. 2 is a block diagram of a main part of the embodiment, FIG.
FIG. 5 is a schematic configuration diagram of a main part of the conventional example, FIG. 5 is an explanatory diagram of the operation of the above example, FIG. 6 is a schematic configuration diagram of the conventional example, and FIG. 1 the central control unit, 2 switching monitoring terminal unit, 3 a load control terminal unit, 4 denotes a signal line, 7 relay terminal device, 10 is a wireless transmitter, 11 wireless receiver, X ₁ to X ₄ Is a remote monitoring control device.

Claims (1)

(57) [Claims] A central control unit is connected to a switch monitoring terminal and a load control terminal to which a unique address is set via a pair of signal lines, and each terminal is accessed and monitored from the central control unit. A wireless transmitter for transmitting data and control data in a time-division multiplex manner, transmitting a wireless signal for transmitting an address data and monitoring data of a load control switch having a unique address, and a wireless receiver for receiving a wireless signal; And a relay terminal for returning data received by the wireless receiver to the central controller. In a remote monitoring and control system provided with a plurality of remote monitoring and control devices, wireless data reception for receiving data from the wireless receiver is provided. Circuit and the central control of each remote monitoring and control device for the data received by the wireless data receiving circuit A relay terminal is formed with the terminal circuit for returning to the device, and a page data setting unit is provided in the wireless transmitter to transmit a wireless signal with page data added from the wireless transmitter, and to transmit a wireless signal in accordance with the page data. A transfer control means for selecting a remote control device to which the central control device of the data to be transferred is provided in the relay terminal.