JP2765886B2 - Remote monitoring and control system - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a remote monitoring and control system.

[Prior Art] Conventionally, this type of remote monitoring and control system, as shown in FIG. 7, a central control unit 1, a plurality of monitoring terminal device for monitoring the switches S ₁ to S ₄ unique address is set 2, load
The control terminal 3 for controlling L _{1 to} L ₄ , the wireless relay terminal 7, the external interface terminal 8, and the pattern setting terminal 9 are connected by a pair of signal lines 4.
Here, the transmission signal Vs transmitted from the central controller 1 to the signal line 4 includes a start pulse signal ST indicating the start of signal transmission, a mode data signal MD indicating a signal mode, address data signal AD for transmitting 8-bit address data for calling a terminal unit 2,3,7～9, 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
Control data of the transmission signal Vs when the address data of the transmission signal Vs and its own unique address data match, and synchronizes the monitoring data signal with the current mode signal (between the signal lines 4) in synchronization with the transmission signal Vs return wait signal WT. As 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 wireless relay terminal 7 and the external interface terminal. 8. When an interrupt signal Vi as shown in FIG. 8 (b) returned from the pattern setting terminal 9 is received, the interrupt generating 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. The central control unit 1 also uses the monitoring data returned from the monitoring terminal 2 or the wireless relay terminal 7, the external interface terminal 8, and the pattern setting terminal 9 to the central control unit 1 as described above. And creates control data to be transmitted to the control terminal 3 that controls the corresponding loads L _{1 to} L ₄ , and transmits the control data to the control terminal 3 via the signal line 4 in a time-division multiplex manner. and controls the load L ₁ ~L _4.

The wireless relay terminal 7 is a terminal that relays data of an optical wireless system including an optical wireless transmitter Y, an optical wireless receiver X, and a wireless signal line 10 arranged as shown in FIG. An optical signal transmitted from the optical wireless transmitter Y is received by the optical wireless receiver X, the received data is received via the wireless signal line 10, and the data is transferred to the central control device 1. It has become.

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

[Problem to be Solved by the Invention] However, in the above-described conventional example, in addition to the individual control switch provided corresponding to the load, the load provided for setting the pattern control data is also provided. There are switches that are not normally used, such as a selector switch for selection, and a switch for remote control provided in another place (for example, entrance). In the conventional example, these switches that are not normally used are also constantly monitored. Therefore, there is a problem in that the unused switch is operated by mistake or is operated by mischief, and the load malfunctions.

The present invention has been made in view of the above points, and an object of the present invention is to provide a remote monitoring device capable of preventing a switch that is not normally used from being operated by mistake or being operated by mischief and causing a load to malfunction. It is to provide a control system.

[Means for Solving the Problems] A remote monitoring and control system according to the present invention includes a central control device,
A plurality of monitoring terminals and control terminals each having a unique address set are connected via a pair of signal lines, and when the central controller receives an interrupt signal from the monitoring terminal, the monitoring terminal is connected to the monitoring terminal and the control terminal. Interrupt processing means for accessing the terminal and returning the monitoring data; generating control data to be transmitted to a control terminal for controlling a corresponding load based on the received monitoring data; And a stop setting means for setting a stop switch and a monitoring terminal to stop the monitoring function when the stop switch is turned on. With the above, a selective stop means for appropriately stopping a monitoring function of a monitoring terminal device for monitoring a switch which is not normally used is formed. When the stop switch is turned on, a monitoring terminal set by the stop setting means is formed. To ignore the monitoring data from the one in which the formation of the central controller.

[Operation] The present invention is configured as described above, and a remote supervisory control in which the supervisory terminal and the control terminal are accessed from the central control device to transmit the supervisory data and the control data in a time division multiplex manner. In the system, the selection stop means for appropriately stopping the monitoring function of the monitoring terminal device for monitoring the switch which is not normally used is provided, so that the switch which is not normally used is operated erroneously or is operated by mischief and the load malfunctions. Can be prevented.

Embodiment FIG. 1 shows a comparative example of the present embodiment, in which a central control device 1, a plurality of monitoring terminals 2 and a control terminal 3 in which a unique address is set are paired. In a remote monitoring and control system similar to the conventional example, which is connected via the signal line 4 and accesses the terminals 2 and 3 from the central control device 1 to transmit monitoring data and control data in a time division multiplex manner, 'are those in which a selected stop means for stopping appropriately monitoring function of the monitoring terminal unit 2a for monitoring the switch S ₁ not normally used' switch S ₁ is not used for relay terminals monitoring terminal unit 2a for monitoring the The selection stop means is formed by connecting to the signal line 4 via the device 11 and enabling data relay by the relay terminal device 11 to be freely stopped. As shown in FIG. 2, the relay terminal 11 includes a signal receiving circuit 12 for receiving a transmission signal Vs transmitted from the central control device 1 via the signal line 4, and a current mode signal on the signal line 4. a reply circuit 13 for sending the composed return signal V _B, a one-chip microcomputer consisting of a signal processing circuit 14, a signal sending circuit 15 for sending a transmission signal Vs' to the signal line 4a, is returned via the signal line 4a return signal V _B and the reply receiving circuit 16 for receiving, signal line 4 via a receive stop control data transmitted from the central controller 1 sends it to the signal processing circuit 14 the terminal circuit 17
And a power supply circuit 18 for forming a terminal power supply. FIG. 3 is a perspective view of the appearance, in which a power supply connection terminal 21, a ground terminal 22, a connection terminal 23 for the signal line 4, and a connection terminal 24 for the signal line 4a are provided on the upper surface of the terminal device case 20. I have.

Hereinafter, the operation of the remote monitoring control system of FIG. 1 will be described. In this remote monitoring and control system, in a remote monitoring and control system in which the central control unit 1 accesses the monitoring terminals 2 and 2a and the control terminal 3 to transmit monitoring data and control data in a time-division multiplex manner, The relay terminal 11 for appropriately stopping the monitoring function of the monitoring terminal 2a for monitoring the unused switch S ₁ ′ is provided. In a normal state, the signal processing circuit 14 of the relay terminal 11 the transmission signal Vs received by the signal receiving circuit 12 via, sends out the signal line 4a through the signal transmitting circuit 15, a signal line a return signal V _B received by the reply receiving circuit 16 via the return circuit 13 sent to 4, it is performed relay operation of the transmission signal Vs and return signal V _B.

On the other hand, the stop switch SWa being monitored by the monitoring terminal 2b is turned on, and control data for stopping the relay is transmitted from the central controller 1 to the terminal circuit 17 of the relay terminal 11 via the signal line 4. Then, a relay stop signal is output from the terminal device circuit 17 that has received the relay stop control data to the signal processing circuit 14. At this time, when the signal processing circuit 14 receives the interrupt request signal Vi received by the reply receiving circuit 16, it does not transmit this interrupt request signal Vi to the reply circuit 13,
An interrupt release instruction is transmitted independently to all addresses. Therefore, the operation of the normally unused switch S ₁ ′ monitored by the monitoring terminal 2 a is ignored by the central control unit 1, and the normally unused switch S ₁ ′ is erroneously operated or mischief. be manipulated by the load L ₁ is prevented from malfunctioning. Also,
Since the signal line 4 and the signal line 4a are separated via the relay terminal 11, even if the signal line 4a is short-circuited, it is possible to prevent the entire remote monitoring and control device from going down.

FIG. 4 shows an embodiment, in which a stop switch SWa and
When the stop switch SWa is turned on, the stop function is set by the stop setting means for setting the monitoring terminal 2 for which the monitoring function should be stopped. When the stop switch SWa is turned on, the monitoring terminal set by the stop setting means is formed. The central control device 1 is formed so as to ignore the monitoring data from the switch 2. In the embodiment, the operation state of the stop switch SWa is determined by the monitoring terminal 2 b.
, And the stop setting switch SWb is monitored by the monitoring terminal 2b '. In the figure, reference numeral 2 'denotes a group of monitoring terminals, and 3' denotes a group of control terminals. The setting of the monitoring terminal 2 for which the monitoring function should be stopped includes an individual switch, a selector switch, a group switch, a pattern switch, and the like. Done by FIG. 6 shows an example of a circuit configuration of the central control unit 1, in which a signal processing circuit 30 and a transmission signal generation circuit 31 are shown.
, A reception signal discrimination circuit 32, a transmission signal transmission circuit 33, a return signal reception circuit 34, and a power supply circuit 35.
In the figure. OP ₁ ~OP ₄ is an operational amplifier, Q ₁ ~Q ₄ transistors,
D _{1 to} D ₃ are diodes, ZD is a Zener diode, LD is a light emitting diode for operation display, PC ₁ and PC ₂ are photocouplers, V
R _{1 to} VR ₃ are three-terminal regulators.

FIG. 5 is a flowchart showing the operation. When an interrupt request is received from any of the monitoring terminals 2, the central control unit 1 first performs interrupt polling and generates an interrupt request. 2 to return the monitoring data. Next, it is checked whether or not the stop switch SWa is turned off, and if the stop switch SWa is turned off, the monitoring control operation is performed by a normal interrupt process, and if the stop switch SWa is turned on, Then, it is determined whether or not the monitoring terminal device 2 should stop the monitoring function. Here, the monitoring terminal 2 that has generated the interrupt request
If the terminal is a terminal whose monitoring function should be stopped, the interrupt request release command is immediately transmitted without performing the normal switch monitoring control operation to release the interrupt request from the terminal that generated the interrupt request. The operation of the switch monitored by the terminal device 2 is ignored. In addition, even if the monitoring terminal device 2 has stopped the monitoring function, the operation display of the load by the light emitting diode is performed.

On the other hand, if the monitoring terminal device 2 is not to stop the monitoring function, it goes without saying that a normal monitoring control operation is performed.

The setting of the monitoring terminal 2 for which the monitoring function should be stopped is performed by the stop setting switch 2b '. First, the stop setting switch SWb is pressed to set the stop mode (at this time, the light emitting diode indicating that the stop setting is being performed is activated). Lighting), individual switches, a selector switch in which a large number of individual switches are centrally arranged, a pattern switch for collectively controlling a plurality of loads in a preset pattern, and a group for collectively controlling a plurality of grouped loads. Using a switch or the like, the monitoring terminal 2 whose monitoring function is to be stopped is selected. Next, when the stop setting switch SWb is pressed again, the unique address of the monitoring terminal 2 selected as described above is stored in the monitoring function setting memory of the central control device 1 as the address of the terminal to stop the monitoring function. When the interrupt request is generated, the central control unit 1 refers to the monitoring function setting memory to determine whether to perform the monitoring control operation.

[Effect of the Invention] The present invention is configured as described above. When the central control device receives an interrupt signal from the monitoring terminal, the central control device accesses the monitoring terminal to return the monitoring data. Having processing means, generating control data to be transmitted to a control terminal for controlling a corresponding load based on the received monitoring data, and transmitting the control data to the control terminal via the pair of signal lines; A monitoring terminal for performing time-division multiplex transmission, wherein a stop switch and a stop setting means for setting a monitoring terminal for which a monitoring function is to be stopped when the stop switch is turned on monitor a switch which is not normally used. Forming a selective stopping means for appropriately stopping the monitoring function of the container,
When the stop switch is turned on, the central control device is formed so as to ignore the monitoring data from the monitoring terminal set by the stop setting means.
The monitoring data from the monitoring terminal set by the stop setting means will be ignored by the central control unit, and it will be possible to prevent a switch that is not normally used from being operated erroneously or by mischief and the load from malfunctioning. Can be prevented.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a comparative example of the present invention, FIG. 2 is a main part block circuit diagram of the same, FIG.
FIG. 5 is a schematic configuration diagram of the embodiment, FIG.
6 is a main part circuit diagram of the above, FIG. 7 is a schematic configuration diagram of a remote monitoring and control system according to the present invention, FIG. 8 is an operation explanatory diagram of the same, and FIG. 9 is a schematic configuration of an example of the same. FIG. 1 is a central control unit, 2 and 2a are monitoring terminals, 3 is a control terminal, 4 and 4a are signal lines, 11 is a relay terminal, SWa is a stop switch, and SWb is a stop setting switch.

Claims (1)

(57) [Claims] A central controller is connected to a plurality of monitoring terminals and control terminals to which a unique address is set via a pair of signal lines, and the central controller is connected to the monitoring terminal from the monitoring terminal. Control data to be transmitted to a control terminal for controlling a corresponding load based on the received monitor data, comprising interrupt processing means for accessing the monitor terminal when the interrupt signal is received and returning the monitor data; And the control data is transmitted to the control terminal via the pair of signal lines in a time-division multiplex manner. The stop switch and the monitoring function should be stopped when the stop switch is turned on. With the stop setting means for setting the monitoring terminal, the selection setting means for appropriately stopping the monitoring function of the monitoring terminal for monitoring the switch which is not normally used is formed. When the stop switch is turned on, the stop setting is performed. Remote monitoring and control system characterized by the formation of the central controller to ignore the monitoring data from the monitoring terminal unit that has been set in stages.