JPH025357B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention connects a main control panel and a plurality of terminal devices to each other via signal lines, and centrally controls the loads connected to each terminal device by the main control panel. This invention relates to a remote monitoring and control system that allows a main control panel to centrally monitor the outputs of sensors connected to other terminals.

FIG. 1 is a block diagram showing the configuration of a conventional general remote monitoring and control system, in which power from a power line 2 branched off by a distribution board 1 operates a main control panel 3, and the power from the power line 2 is The power for driving the loads 4 is once drawn into each terminal device _{5 1} , _{5 2 .} It full-wave rectifies the signal power sent through the power source and uses it as its own operating power source, and also reads this signal itself to control the load 4. 7 is a sensor such as a daylight sensor or temperature sensor that detects external illuminance and temperature, and its output is sent to the terminal device 5 ₃
The signal is sent back to the main control panel 3 as a monitoring signal.

By the way, when such a conventional remote monitoring and control system is used, for example, in a lighting load control system, when the amount of light detected by the sensor 7 is large, the lighting loads 4 are generally lighted in a thinned-out manner, or
They are often designed with a dimming function to reduce the amount of light and save power. However, in a tunnel entrance lighting system, etc., as the amount of external light increases, it is necessary to control the light amount of the lighting load 4 to increase accordingly to reduce the difference in the amount of light inside and outside the tunnel. Furthermore, when the above remote monitoring and control system is used as an indoor temperature control system, when the ambient temperature is high, the heater load 4 may be turned off to save power, and the cooling device load 4 may be turned on to lower the temperature. There is.

The present invention has been made in view of these points, and provides a remote monitoring and control system in which when a sensor turns on or off, it is possible to select whether to turn on or turn off the corresponding load. The purpose is to provide the following.

The configuration of the present invention will be described below with reference to illustrated embodiments. FIG. 2 is a block diagram showing the overall configuration of an embodiment of the present invention, in which sensors 7 ₁ to 7 _N , such as daylight sensors and temperature sensors, are connected to terminal devices 5 _A1 to 5 _AN . In addition, the terminals 5 _B1 to 5 _BM have loads 4 such as lighting loads, heater loads, or cooling equipment.
₁ to 4 _M are connected. Each of the terminals 5 _A1 to 5 _AN and 5 _B1 to 5 _BM has the same configuration as shown in the block diagram of FIG. In FIG. 3, 8 is a diode bridge that full-wave rectifies the signal power sent from the main control panel 3 via the signal line 6, and the output voltage of this diode bridge 8 is provided in the power supply circuit 9. The terminal logic is smoothed by a large capacitor.
It is input to the power input terminals V _DD and GND of the IC 10.
11 is a waveform shaping circuit that shapes the voltage waveform on the signal line 6 and inputs the waveform to the signal input terminal S _G of the terminal logic IC 10. On the signal line 6, a time division multiplex transmission signal as shown in FIG. 4a is transmitted from the main control panel 3 to each terminal 5, and this signal is a wide pulse. represents a logical value "1", and a narrow pulse represents a logical value "0". For each terminal device 5, a 1-bit pulse with a logical value "1" serving as a start pulse, a predetermined terminal device 5. 8-bit address AD, 1-bit address parity AP,
1-bit pulse with logical value ``1'', 5-bit control data CD that sets the control content in the called terminal 5, 1-bit control data parity CP, and 5 to 6 bits that are the waiting period for the return signal. A signal consisting of long pulses arranged in series is sent out, and this signal is sent out cyclically and repeatedly one after another for each address. The terminal logic IC 10 in each terminal 5 receives the signal on the signal line 6 as described above via the waveform shaping circuit 11, and compares and verifies the data contents of the address data AD with the output of the address setting switch 12. control data when the call to self is determined.
The load 4 connected to the control output terminal 13 is controlled on and off according to the contents of the CD, and the on/off output of the sensor 7 connected to the monitoring input terminal 14 is converted into parallel and serial and input to the return signal drive section 15. It is something to do. The return signal drive section 15 short-circuits the signal line 6 through an appropriate impedance during the long pulse sending period from the main control panel 3 under the control of the terminal logic IC 10, thereby setting the current mode as shown in FIG. 4b. The state of the sensor 7 is then sent back to the main control panel 3.

Next, the main control panel 3 has an output circuit 16a that sends a signal to the signal line 6, as shown in the block diagram of FIG.
and an input circuit 16b that receives a return signal sent back in current mode via the signal line 6, both of which are connected to the arithmetic circuit section 17. 18 manually turns on loads 4 ₁ to 4 _M. It is a key switch for turning off the sensor, and 19 is a switch function setting unit to which switches 20 ₁ to 20 _N are connected to set the functions of the sensors 7 ₁ to 7 _N to on type or off type. The loads 4 ₁ to 4 _M connected to each terminal device 5 _B1 to 5 _BM include a load 4 that turns on or off when the sensors 7 ₁ to 7 _N turn on or off. The correspondence relationship between the sensor 7 and the load 4 is stored in the storage section 21. _Therefore , when _a specific sensor ₇ It is now possible to decide based on Therefore, regardless of whether the sensors 7 ₁ to 7 _N connected to each terminal device 5 _A1 to 5 _AN are optical sensors or temperature sensors, and the load connected to each terminal device 5 _B1 to 5 _BM Whether 4 ₁ to 4 _M is a building lighting load, a tunnel entrance light, or a heater load or cooling device, each switch 20 ₁ to 2
By switching 0 _N , sensor 7 is turned on.
It is possible to set a desired correspondence between the OFF operation and the ON or OFF operation of the load 4.

Next, FIG. 5 shows another embodiment of the present invention, in which the sensor 7 is controlled by the unique address of the terminal 5.
The correspondence relationship between the on/off operations of the load 4 and the on/off operations of the load 4 is distinguished. Therefore, in this case, the address setting switch 12 of the terminal device 5 also functions as a selection switch for selecting between the on-type sensor 7 and the off-type sensor 7. In this example, 0ch~
Among the 255ch addresses, the load 4 is connected to the terminals 5 of 0ch to 199ch, the sensor 7 that should turn on the load 4 when the sensor 7 is turned on is connected to the terminals 5 of 200ch to 229ch, and the 230ch ~255ch terminal device 5
The sensor 7 that should turn off the load when the sensor 7 is turned on is connected to the main control panel 3 because the correspondence between the sensor 7 and the load 4 can be determined on the side of each terminal 5. The burden is reduced, and the address setting switch 12 of each terminal device 5 can also be used as an on-type/off-type selection switch for the sensor 7.
This saves the cost of the switch.

FIG. 6 shows still another embodiment of the present invention, in which the sensor 7 is connected to one monitoring input terminal 14 1 of the terminal 5 _A , and the sensor 7 is connected to the other monitoring input terminal 14 ₁ of the terminal device 5 A. A switch 22 is connected to ₁₄₅ . In the figure, 23 is a pull-up resistor, which sets the monitoring input terminal ₁₄₅ to H level when the switch 22 is off. Further, when the switch 22 is turned on, the monitoring input terminal ₁₄₅ is at the ground level, that is, the L level. Therefore, when the switch 22 is turned on or off, the state of the switch 22 is sent back to the main control panel 3. Therefore, for example, when the sensor 7 is turned on, the load 4 corresponding to this sensor 7 is When it is necessary to turn on the sensor 7, the switch 22 is closed, and when the sensor 7 is on and the load 4 needs to be turned off, the switch 22 is left open. The correspondence relationship between the on/off operation of the sensor 7 and the on/off operation of the load 4 can be freely selected depending on the off state.

As described above, the present invention connects a main control panel and a plurality of terminal devices to each other via signal lines, and sends an address signal, a control data signal, and a return standby signal from the main control panel to each terminal device. Serially arranged signals are cyclically transmitted for each address, and each terminal has an address judgment means that compares the address signal on the signal line with its own address, and a control output according to the control data signal when the address signals match. control output means for generating a signal, and a monitoring input means for generating a monitoring signal to be sent back to the main control panel within the return standby signal period, and a monitoring input means of a terminal device for sensor monitoring is provided with an output of ON/OFF. A sensor that has two states, OFF, is connected, and a load is connected to the control output means of a terminal for load control, and in response to a return signal from the terminal for sensor monitoring, the terminal for monitoring the sensor is connected. In a remote monitoring and control system in which a main control panel is provided with a control means for creating and transmitting on/off control data for a load connected to a control output means of a second terminal device corresponding to a sensor, the load is turned on when a sensor is turned on. Since the sensor monitoring terminal is equipped with a switch to select whether to turn it on or off, each sensor is It is possible to freely select whether to turn on or turn off the load corresponding to the sensor according to the on/off operation of the sensor, which eliminates the need to change the system design and greatly expands the range of applications. This has the advantage of being wider.

[Brief explanation of drawings]

Fig. 1 is a block diagram of the conventional example, Fig. 2 is a block diagram of an embodiment of the present invention, Fig. 3 is a block diagram showing the configuration of the same terminal device, and Figs. 4 a and b are the same as the above signal lines. FIG. 5 is a block diagram of another embodiment of the same, and FIG. 6 is a block diagram of the configuration of a terminal in still another embodiment of the same. 3 is the main control panel, 4 is the load, 5 is the terminal, 6 is the signal line, 7 is the sensor, 17 is the arithmetic circuit section, 19 is the switch function setting section, 20 ₁ to 20 _N are the switches, 2
1 is a storage section.

Claims (1)

[Claims] 1 Connect the main control panel and multiple terminal devices to each other via signal lines, and send a signal consisting of an address signal, a control data signal, and a return standby signal arranged in series from the main control panel to each terminal device. Address determination means for cyclically transmitting each address, and each terminal device compares the address signal on the signal line with its own address; control output means for generating a control output according to the control data signal when the address signals match; A monitoring input means that generates a monitoring signal to be sent back to the main control panel within the return standby signal period is provided, and the output of the monitoring input means of the terminal device for sensor monitoring has two states: on and off. At the same time as connecting the sensor, the load is connected to the control output means of the terminal device for load control, and in response to a return signal from the terminal device for sensor monitoring, a second terminal device corresponding to the terminal device for sensor monitoring is connected.
In a remote monitoring and control system, the main control panel is equipped with a control means that creates and sends on/off control data for a load connected to the control output means of a terminal device. 1. A remote monitoring and control system characterized in that a switch for selecting whether to perform sensor monitoring is provided on a terminal device for sensor monitoring.