JPH0578083U - Supervisory control system - Google Patents

Abstract

(57) [Abstract] [Purpose] An object of the present invention is to provide a supervisory control system in which the configuration of a supervisory unit in a terminal device for controlling a plurality of loads is simple and the manufacturing cost is low. The sensor unit 5 inputs a detection signal of a secondary current of a ballast 6 from a CT 7 to a D-type flip-flop FF by a latch signal L from the terminal unit 3. D-type flip-flop F
F uses the count output C ₀ of the counter 36 of the terminal device 3 as a clock signal to latch the detection signal, and after the latching, each time the clock signal rises, D of the sensor section 7 in the subsequent stage is latched.
The Q output of the type flip-flop FF is sequentially shifted. The signal sequence shifted serially is converted into a parallel signal by the serial-parallel converter 34A in the terminal unit 3, dual port determined by the counter output C ₄ -C ₁₁ RA
It is written in the address of M34B and read by the arithmetic control unit 32 at the end of counting. The arithmetic control unit 32 determines the state of the load 4 based on the read detection signal.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a supervisory control system.

[0002]

[Prior Art]

 FIG. 6 shows the configuration of a conventional supervisory control system of this type. In this conventional example, a signal line 2 made of an optical fiber connected to an output end of a main supervisory controller 1 is sequentially connected to a main unit 3 via a terminal 3. The system is configured by a closed-loop network that is connected to the input end of the monitoring control unit 1 and that transmits a transmission signal only in one direction of the arrow shown in the signal line 2.

The format of the transmission signal used in this system is configured as shown in FIG. 7, and includes a start signal ST indicating the beginning of the transmission signal, an address signal AD in which address data of the terminal 3 is written, and Control / monitor mode signal MD for determining whether the information signal DA is a signal consisting of control information or a signal consisting of monitoring information sent from the terminal 3, the above information signal DA, and a transmission signal. And an end signal EN indicating the end of. Of course, the format of this transmission signal is an example, and the order of the address signal AD and the mode signal MD is arbitrary, and it is possible to determine whether it is a transmission signal having control information or a transmission signal having monitoring information. That's fine.

FIG. 8 shows the configuration of the terminal device 3, which includes an address setting unit 30 for physically setting a unique address, and the terminal device 3 or the main monitoring control unit 1 in the preceding stage on the input IN side. The function of connecting the optical fiber signal line 2 to O / E conversion of the transmission signal composed of the optical signal sent through this signal line 2 and the terminal 3 of the next stage from the output OUT side (or the final stage If present, a signal processing unit 31 having a function of E / O converting a transmission signal sent to the main monitoring control unit 1), an arithmetic control unit 32 including a CPU for performing signal processing of the entire terminal device 3, and an arithmetic operation Under control of the control unit 32, the control unit 33 turns on / off the load 4 such as a lighting load, and the monitoring unit 34 that fetches operation information from the sensor 5 that monitors the operation of the load 4 is illustrated. The terminal device 3 that controls a plurality of loads 4 ... In order to monitor the operation of each load 4, the corresponding sensor units 5 are provided, and the detection signals of these sensor units 5 are sent to each monitoring unit 34. There is. Of course, in the case of the terminal device 3 that controls one load 4, one sensor unit 5 and one monitoring unit 34 are provided.

The operation control unit 32 of the terminal device 3 monitors and controls the entire terminal device 3 according to the flowchart shown in FIG. 9. For example, when a transmission signal is input through the signal processing unit 31, the address signal AD Of the address data of the address setting unit 30 is determined, and if they match, the control signal is determined by taking in the information signal DA having the next control information based on the mode signal MD. Then, the switch element 35 is turned on or off through the control unit 33 to control the load 4.

On the other hand, if the address data of the address signal AD of the input transmission signal does not match the set address, or if the mode signal MD is in the monitoring mode, the signal processing unit 31 causes the terminal unit 3 of the next stage (or the last stage to The transmission signal is sent to the main supervisory control unit 1) via the signal line 2 as it is. In the standby state where no transmission signal is input, the built-in timer repeats the counting operation, and every time the counting time becomes 0, the operation control information from the sensor 5 through the monitoring section 34 is fetched from the sensor 5 by the operation control section 32. The supervisory information based on this operation information is set in the information signal D A, the mode signal MD is set in the supervisory mode, and the transmission signal in which the own address is set in the address signal AD is sent from the signal processor 31 to the next stage. It is sent out to the terminal device 3 (or the main monitoring control unit 1 in the final stage) via the signal line 2.

The transmitted transmission signal having the monitoring information is sequentially transmitted through the terminal unit 3 and finally reaches the main monitoring control unit 1, and the main monitoring control unit 1 sets the address signal AD. It is possible to determine the operating state of the load 4 connected to the terminal 3 having the designated address. FIG. 10 shows the configuration of the main supervisory control unit 1. The main supervisory control unit 1 is connected to the arithmetic control unit 10 including a CPU for controlling the main supervisory control unit 1 and the terminals 3. The operation unit 11 for inputting an instruction or the like for controlling the load 4, the display unit 12 for displaying the operating state of the load 4 connected to each terminal 3, and the transmission signal having the control information through the signal line 2. Or a terminal I / F unit 13 for inputting a transmission signal having monitoring information sent from the terminal device 3 through the signal line 2, and in the illustrated example, three transmission monitoring systems are provided. It is adapted.

By the way, as shown in FIG. 11A, the arithmetic control unit 10 of the main supervisory control unit 1 is based on a control command to the load 4 of the predetermined terminal device 3 inputted from the operation unit 21, and the terminal unit concerned. 3 creates address data and control information, has an address signal AD consisting of the address data and an information signal DA with control information set, and transmits a transmission signal with the mode signal MD set to the control mode. The control process of sending out from the I / F unit 13 via the signal line 2 and the contents of the information signal DA which is the monitoring information from the transmission signal and the address data of the address signal AD are input as shown in FIG. 11 (b). A determination process is performed and a monitoring process of displaying the operating state of the corresponding load 4 of the terminal device 3 on the display unit 12 is performed.

[0009]

[Problems to be solved by the device]

 By the way, in the above-mentioned conventional example, when there are a plurality of loads 4 controlled by one terminal device 3, it is necessary to provide as many monitoring units 34 as the number of sensor units 5 provided corresponding to each load 4. The size of the terminal 3 has become large, and the number of types of terminal devices 3 has varied depending on the load.

Further, in the case where one terminal device 3 is provided corresponding to one load 4, when controlling a large number of loads 4, a large number of terminal devices 3 are required, which is costly. There was a problem of taking up space. The present invention has been made in view of the above problems, and an object of the present invention is to provide a monitoring control system in which the configuration of a monitoring unit in a terminal device that controls a plurality of loads can be simplified and the manufacturing cost is low. There is

[0011]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention outputs a transmission signal having control information for a load to a terminal to which one or a plurality of loads are connected, and has a load operation status monitoring information from the terminal side. If the input transmission signal is a transmission signal that has control information corresponding to itself, the main monitoring control unit that inputs the transmission signal and controls and monitors each load is fetched and connected. It controls the load, outputs the input transmission signal when it is not compatible, inputs the detection signal from the sensor unit that monitors the operation of the load, and outputs the transmission signal having the monitoring information based on the detection signal. Monitoring control consisting of the above-mentioned terminal device, the above-mentioned load which is connected to the above-mentioned terminal device and returns operation information to the terminal device, and a signal line which sequentially connects the main monitoring controller and a plurality of terminal devices. To the system Therefore, the sensor unit corresponding to each load attached to the terminal unit to which a plurality of loads are connected is added to the sensor unit in the preceding stage by adding its own detection signal to the signal sequence output from the sensor unit connected in the latter stage. It is equipped with a shift means for outputting to the terminal.

[0012]

[Action]

 Thus, according to the present invention, in a terminal device capable of controlling a plurality of loads, the detection signal input from each sensor unit to the terminal device is taken in as a serial signal string, so each sensor unit of the signal string is It is only necessary to be able to sequentially determine the signals corresponding to, so that it is not necessary to provide a corresponding monitoring unit for each of the multiple sensor units, and only one monitoring unit needs to be provided in the terminal device, and as a result, a terminal that controls multiple loads The device and the terminal device that controls a single load need not have the same configuration, and it is possible to avoid making the terminal device large-scale and multi-product, and to reduce the manufacturing cost.

[0013]

【Example】

 Hereinafter, the present invention will be described with reference to examples. (Embodiment 1) FIG. 2 shows the configuration of the entire system of the present embodiment. The connection of the entire system is basically the same as the conventional system, but the inside of the terminal device 3 and the sensor unit 5 used is The structure is different as shown in FIG. 1, and the format of the transmission signal used is changed as shown in FIG.

That is, the sensor unit 5 is provided with a CT7 for detecting the secondary current of the ballast 6 connected in series to the load 4 composed of a discharge lamp, and when the secondary output of the CT7 exceeds a certain level, the certain level is obtained. Zener diode ZD clipped to (5V), AND gate AN ₁ which takes the logical product of latch signal L from terminal 3 and the output of CT7, an inverted signal of latch signal L, and the sensor section 5 in the subsequent stage. An AND gate AN ₂ that takes the logical sum of the output or the ground input, an OR gate OR that takes the logical sum of the gate outputs of these AND gates AN ₁ and AN ₂ , and the output of this OR gate OR are input to the D terminal, latched by the clock signal from the vessel 3, D-type the flip outputs the Q output to or the terminal device 3 outputs to the aND gate aN ₂ of the sensor section 5 of the next stage Tsu Consisting of a FF.

On the other hand, the terminal device 3 includes an arithmetic control unit 32 including a CPU, a monitoring unit 34 including a serial / parallel converter 34A and a dual port RAM 34B, and starts counting by using the latch signal L as a trigger to output a count output C. A counter that outputs ₀ as a clock signal, outputs count outputs C _{4 to} C ₁₁ as addresses A _{10 to} A ₁₇ of the dual port RMA 35 B, and gives an end signal as an INT signal to the arithmetic control unit 32 at the end of counting. 36, a control unit 33, and a signal processing unit 31, connect the addresses A _{0 to} A ₇ of the arithmetic control unit 32 to the addresses A _{20 to} A ₂₇ of the dual port RAM 34 B, and RD _{2 of the} dual port RAM 34B. The RD signal from the arithmetic control unit 32 is given to the terminals, and the count outputs C ₀ to C ₃ are given. NAND gate ND is used to connect the gate output to the WR ₁ terminal of the dual port RAM 34B and the parallel out output trigger terminal of the serial / parallel converter 34A.

The transmission signal includes a start signal ST, an address signal AD for setting the address of the terminal device 3, a mode signal MD indicating control information or monitoring information, and one load 4 of the target terminal device 3. A load number data signal LD indicating whether there is a large number (a plurality) and a logical value "1" is set when the load 4 is normal, and a logical value "0" is set when the load 4 is abnormal (missing) It is composed of a data signal DA ₁ , a load identification data signal DA ₂ for setting an abnormal load number, and an end signal EN, and the load identification data DA ₂ portion for setting an abnormal load number has a variable length. ..

Next, the operation of the terminal device 3 will be described based on the timing chart shown in FIG. 4 and the flow chart shown in FIG. First, the arithmetic control unit 32 is configured to issue an interrupt with a fixed period by a built-in timer, and at the interrupt timing, the latch signal L is output from the I / O output as shown in FIG. 4 (a). While the latch signal L is being output, in the sensor section 5, the output of CT7 is input to the D terminal of the D-type flip-flop FF via the AND gate AN ₁ and the OR gate OR. On the other hand, the counter 36 in the terminal device 3 outputs a count output C ₀ ... Through counting by the latch signal L. The count output C ₀ shown in FIG. 4 (b) is input to the CK terminal of the D-type flip-flop FF of each sensor unit 5 as a clock signal, and the first count output after the output of the latch signal L At the rising edge of C ₀ , the signal corresponding to the output of CT7 is latched.

That is, when the load 4 is faulty and the secondary current of the ballast 6 is 0 A, it is “L”, and when the load 4 is normally turned on and the secondary current of the ballast 6 flows, the output of CT 7 is output. If is above a certain level, "H" is latched. The output of the latch signal L is output from the AND gate AN ₁ of the sensor unit 5 for eliminating before rising the next count output C ₀ becomes "L", whereas Andoge DOO AN ₂ is D in the subsequent stage of the sensor unit 5 An output corresponding to the Q output of the type flip-flop FF is generated, and this output is input to the D terminal of its own D-type flip-flop FF through the OR gate OR. Since one input of the AND gate AN ₂ is fixed to “L”, the output of the OR gate OR is also fixed to “L” in the last sensor unit 5.

Next, when the count output C ₀ rises, the Q output of the D-type flip-flop FF of the sensor section 5 at the subsequent stage is latched by its own D-type flip-flop FF. After that, each time the count output C ₀ rises, the Q output of the D-type flip-flop FF of the sensor unit 5 in the subsequent stage is sequentially shifted. Then, every time it is shifted by 8 bits, it is converted into an 8-bit parallel signal by the serial parallel converter 34A provided in the terminal device 3. The converted parallel signal is written in the dual port RAM 34B at the timing when the output of the NAND gate ND which takes the logical AND of the count outputs C _{0 to} C ₃ becomes "L" as shown in FIG. 4 (g). .. 4C to 4E show the count outputs C _{1 to} C ₃ , and FIG. 4F shows the count output C ₄ .

The address to which the above parallel signal is written is determined by the count outputs C _{4 to} C ₁₁ . In this way, when the writing of the data corresponding to the detection signals of all the sensor units 5 into the dual port RAM 34B is completed, that is, when the count of the counter 36 of the terminal device 3 is completed, the counter 36 calculates the count end signal. The signal is output to the INT terminal of the control unit 32 to generate an interrupt. When the arithmetic control unit 32 receives an interrupt, it reads the data written in the dual port memory RAM 34B as shown in the flowchart of FIG. The logical values of all the bits are "1" ( "H") of the case to set the logical value "1" to the monitoring data DA ₁ as a normal transmission signal a signal processing unit for a mode signal M D is set to the monitoring Output via 31. If there is "0"("L") in the logical value of any of the bits, it is determined which sensor signal the detection signal of the sensor section 5, that is, which load 4 the monitoring signal DA has. together setting the logical value "0" to _1, the monitoring after the data DA _1, and set the number of load identification data D a ₂ load becomes Futen to 4, and the transmission signal of the mode signal MD is set to the monitoring Is output via the signal processing unit 31.

The transmission signal having this monitoring information is sent to the main monitoring control unit 1 by the same procedure as in the conventional example, and the main monitoring control unit 1 removes the load 4 that has become a defect based on the monitoring information of this transmission signal. Judge and display. In this way, the main monitoring control unit 1 can grasp the operating state regardless of one load 4 or a plurality of loads 4. Of course, even when there is only one load 4 connected to the terminal device 3, the detection signal of the corresponding sensor unit 5 is written in the dual port RAM 34B and sent to the main monitoring control unit 1 as the monitoring information by the above-mentioned procedure. ..

[0022]

[Effect of the device]

 The present invention, in the above-mentioned supervisory control system, detects the self in the signal sequence output from the sensor unit corresponding to each load attached to the terminal unit to which a plurality of loads are connected and the sensor unit connected in the subsequent stage. Since the shift means for adding a signal and outputting to the sensor unit or the terminal unit at the preceding stage is provided, the detection signal input to the terminal unit from each sensor unit can be taken in as a serial signal string. It suffices to be able to sequentially determine the signals corresponding to the sensor units, and as a result, it is no longer necessary to provide individual monitoring units for multiple sensor units, and only one monitoring unit needs to be provided in the terminal device, and a terminal that controls multiple loads Since the device and the terminal device for controlling one load may have the same configuration, it is possible to avoid the increase in size and variety of the terminal device and to reduce the manufacturing cost.

[Brief description of drawings]

FIG. 1 is a circuit diagram of a terminal unit and a sensor unit used in a first embodiment of the present invention.

FIG. 2 is a block diagram of the entire system of the above.

FIG. 3 is an explanatory diagram of a format of a transmission signal used in the above.

FIG. 4 is a timing chart for explaining the operation of the terminal device and the sensor unit used in the above.

FIG. 5 is a flowchart for explaining the operation of the terminal device used in the above.

FIG. 6 is a configuration diagram of the entire conventional system.

FIG. 7 is an explanatory diagram of a format of a transmission signal used in the above.

FIG. 8 is a circuit block diagram of the terminal device used in the above.

FIG. 9 is a flowchart for explaining the operation of the terminal device used in the above.

FIG. 10 is a circuit block diagram of a main monitoring controller used in the above.

FIG. 11 is a flowchart for explaining the operation of the main monitoring controller used in the above.

[Explanation of symbols]

3 terminal device 4 load 5 sensor unit 32 arithmetic control unit 34A serial / parallel converter 34B dual port RAM 36 counter FF D type flip-flop 6 ballast 7 CT C ₀ counter output C _{4 to} C ₁₁ counter output

Claims (1)

[Scope of utility model registration request] 1. A transmission signal having control information for the load is output to a terminal device to which one or a plurality of loads are connected, and a transmission signal having monitoring information on the operating state of the load is input from the terminal device side to load each load. If the input transmission signal is a transmission signal having control information corresponding to itself, the control information is taken in and the connected load is controlled. Connected to the terminal device, which outputs the input transmission signal, inputs the detection signal from the sensor unit for monitoring the operation of the load, and outputs the transmission signal having the monitoring information based on the detection signal, and the terminal device. In a supervisory control system consisting of the above-mentioned load that is controlled by the above and returns operation information to the terminal unit and a signal line that sequentially connects the main supervisory control unit and a plurality of terminal units, an end to which a plurality of loads are connected. The sensor unit corresponding to each load attached to the device is provided with a shift means for adding the detection signal of itself to the signal sequence output from the sensor unit connected to the latter stage and outputting it to the sensor unit of the previous stage or the terminal device. A supervisory control system characterized by that.