JP4844117B2 - Remote monitoring control system and interface device - Google Patents

Description

  The present invention relates to a remote monitoring control system for controlling a load by a predetermined control signal transmitted by a time division multiplex transmission method and an interface device used for the remote monitoring control system.

  For a unique address that uniquely identifies a plurality of control terminals that control the load, a control signal including control data is transmitted by a multiplex transmission method according to the switch operation of the operation terminal assigned with this address. Thus, a remote monitoring control system for performing remote control (remote monitoring control) for controlling a load connected to the control terminal has been devised (see, for example, Patent Document 1).

  This remote monitoring control system is a lighting control system capable of centrally controlling a plurality of lighting fixtures that are loads provided in a wide space such as a store, a factory, a warehouse, and the like. Such a lighting control system is a user-friendly control system capable of remotely operating a plurality of lighting fixtures freely with a wireless transmitter and controlling lighting / non-lighting of the plurality of lighting fixtures collectively. It has become.

In such a remote monitoring and control system, when the main power supply has dropped in the event of an abnormality such as a power failure, a countermeasure has been taken by instantaneously switching from the main power supply to the backup power supply.
JP-A-9-149478

  However, when a power failure occurs when the load that is already on in the remote monitoring control system that controls multiple loads is close to the upper limit of the capacity of the main breaker, the inrush current at the time of switching from the power failure state to the backup power source As a result, there is a problem that the main breaker easily falls down and the system cannot be restored by the backup power source.

  Therefore, the present invention has been proposed in view of the above-described circumstances, and at the time of recovery of the remote monitoring control system, a remote monitoring control system that realizes reliable recovery processing that suppresses inrush current when switching to a backup power supply It is another object of the present invention to provide an interface device used for a remote monitoring control system.

In order to solve the above-described problems, a remote monitoring control system according to the present invention includes a supply state detection unit that detects a power supply state of a power source supplied to the remote monitoring control system, and the remote monitoring control unit using the supply state detection unit. Control signal requesting transition to forced mode to invalidate operation requests from switch terminals during the startup period of the backup power supply in response to detection of power supply stoppage from the main power supply to the system after sending the transmission unit comprises an interface device having only the selected load as thinned out from a plurality of loads, and control means for controlling to allow the power supply from the backup power supply.

In order to solve the above-described problem, the interface device of the present invention is specified by an address set in association with a switching terminal and a load control terminal by a transmission signal transmitted by a multiplex transmission method. Connected to a remote monitoring and control system for controlling a plurality of loads, a supply state detecting means for detecting a power supply state of power supplied to the remote monitoring control system, and a supply state detecting means to In response to the detection of the power supply stoppage from the power supply, the control signal is sent to the transmission unit requesting the transition to the forced mode to invalidate the operation request from the switch terminal during the startup period of the backup power supply. after transmitted, only the selected load as thinned out from a plurality of loads, to allow the power supply from the backup power control And control means for.

  ADVANTAGE OF THE INVENTION According to this invention, it is possible to implement | achieve the reliable recovery process which suppressed the inrush current at the time of switching to a backup power supply at the time of a recovery of a remote monitoring control system.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  A remote monitoring control system shown as an embodiment of the present invention will be described with reference to FIG. As shown in FIG. 1, the remote monitoring control system is connected to a transmission unit 10, a plurality of multiplex transmission switch terminals 11, and a lighting fixture 13 as a load, and a plurality of relay terminals 12 ( The terminal device) and the interface device 20 are connected via a two-wire signal line Ls. As shown in FIG. 1, the interface device 20 may be directly connected to the signal line Ls, or may be connected via the lighting control host device 40.

  Such a remote monitoring and control system realizes desired control over a load by transmitting a signal having the following format. In order to avoid redundant description, the description of the format signal will be made using the multiplex transmission switch terminal 11 and the relay terminal 12.

  The transmission unit 10 sends the transmission signal Vs having the format shown in FIG. 2A to the signal line Ls. As shown in FIG. 2 (a), the transmission signal Vs includes a start pulse ST indicating the start of signal transmission, mode data MD indicating the signal mode, address data AD for individually identifying each terminal, and lighting equipment. Bipolarity comprising control data CD for controlling a load such as 13, checksum data CS for detecting transmission errors, and a signal return period WT which is a time slot for receiving a return signal (monitoring data) from each terminal ( ± 24V) time division multiplexed signal. The transmission signal Vs having such a format is modulated and transmitted by pulse width modulation as shown in FIG.

  The multiplex transmission switch terminal 11 and the relay terminal 12 receive the control data CD of the transmission signal Vs when the address data AD included in the transmission signal Vs received via the signal line Ls matches its own address. At the same time, the monitoring data is returned as a current mode signal (a signal sent by short-circuiting between the signal lines Ls via an appropriate low impedance) in synchronization with the signal return period WT of the transmission signal Vs.

  The transmission unit 10 includes a dummy signal transmission unit (not shown) and an interrupt processing unit. The dummy signal transmission unit always performs polling in which the mode data MD is set to the dummy mode and the transmission signal Vs in which the address data AD is changed cyclically is always transmitted. On the other hand, the interrupt processing unit generates the interrupt signal Vi when the interrupt signal Vi as shown in FIG. 2C is generated from the multiplex transmission switch terminal 11 in synchronization with the start pulse ST of the transmission signal Vs in the dummy mode. The generated multiplex transmission switch terminal 11 is accessed and monitoring data is returned.

  Based on the returned monitoring data, the transmission unit 10 generates control data CD to the relay terminal 12 that controls the corresponding load, and time-division multiplex transmission of the control data CD via the signal line Ls. By doing so, the lighting fixture 13 which is a desired load is controlled to be turned off and on.

  For example, when the operation switch 11a of the multiplex transmission switch terminal 11 is operated to be turned on or turned off, the interrupt signal Vi is sent to the signal line Ls.

  In response to the interrupt signal Vi, the transmission unit 10 sends out a transmission signal Vs for searching for the address of the multiplex transmission switch terminal 11 that has made the interrupt. When the interrupt is received by the transmission unit 10, the multiplex transmission switch terminal 11 that has received the interrupt returns its own unique address as monitoring data.

  The transmission unit 10 that has received this monitoring data determines the interrupted multiplex transmission switch terminal 11 and then sends the transmission signal Vs having the address data AD of the multiplex transmission switch terminal 11 to make access. Then, the operation data corresponding to the operation of the operation switch 11a and the address data assigned to the operation switch 11a are returned as monitoring data.

  The transmission unit 10 generates the control data CD based on the operation data of the multiplex transmission switch terminal 11 returned as the monitoring data, and preliminarily stores the address data and the address data based on the address data returned as the monitoring data. With reference to the table stored in association with each other, the address data AD for delivering the control data CD to the relay terminal 12 connected to the lighting fixture 13 to be controlled is acquired.

  The transmission unit 10 time-division multiplex-transmits the transmission signal Vs including the control data CD thus generated and the acquired address data AD via the signal line Ls. The relay terminal 12 specified by the address data AD of the transmission signal Vs controls turning on and off the lighting fixture 13 designated by the operation of the multiplex transmission switch terminal 11 based on the control data CD of the transmission signal Vs. .

(Interface device 20)
As shown in FIG. 1, the interface device 20 is remotely connected via a signal terminal 21, a lighting control system transmission signal transmitting / receiving circuit 22, and a lighting control host device 40 that are used when directly connecting to the signal line Ls of the remote monitoring control system. The connection terminal 23 used when connecting to the monitoring control system, the RS232C inter-host communication circuit 24, the CPU (Central Processing Unit) 25, the nonvolatile memory 26, and the power supplied from the main power supply AC or the backup power supply GC. A power supply circuit 27 that is supplied in a stable manner, a backup circuit 28 that guarantees a power failure of the interface device 20 in the event of a power failure, a power supply terminal 29 that is supplied with power from the main power supply AC or the backup power supply GC, and a power supply terminal 29 For detecting voltage changes in the main power supply AC and the backup power supply GC supplied via the power supply And a detection circuit 30.

  The interface device 20 includes an ETHERNET (registered trademark) circuit unit 31 and a connector 32 that can be connected to a network that handles data communication based on the Ethernet (registered trademark) protocol. As a result, the remote monitoring control system can be controlled in response to a request from a PC (Personal Computer) 50 that is an external device connected via a network.

  The interface device 20 further includes a JEMA control unit 33 including a photocoupler 33A, a JEMA circuit 33B, an insulated DC / DC circuit 33C, and a JEMA terminal 33D, and conforms to a standard defined by JEMA (Japan Electrical Manufacturers' Association). A JEMA control device such as a home appliance can be connected.

  In the interface device 20 having such a configuration, for example, each functional unit is formed as a circuit on a substrate 20A as shown in FIG. 3, and is housed in a body 20B, a nameplate 20D is attached, and each terminal is formed. It is formed by being closed by the cover 20C.

  The CPU 25 is a control unit that comprehensively controls the interface device 20. The CPU 25 detects the power supply state of the power supplied to the remote monitoring control system based on the voltage value detected by the voltage detection circuit 30, and sends a desired control signal to the transmission unit 10 according to the detection result. Send. For example, when the CPU 25 detects that the power supply from the main power supply AC to the remote monitoring control system is stopped based on the displacement of the voltage value detected by the voltage detection circuit 30, a plurality of lighting fixtures that are loads Control which requests | requires transfer to the forced mode which permits power supply from backup power supply GC only to the lighting fixture 13 selected to thin out among 13, and invalidates the operation request from the multiplex transmission switch terminal 11 The signal is transmitted to the transmission unit 10 before switching to the backup power supply GC.

  Further, the CPU 25 acquires the abnormal state of the remote monitoring control system, for example, by constantly monitoring the signal state such as signal stop, short circuit, disconnection, etc., and stores it in the nonvolatile memory 26. Thereby, the interface device 20 can realize a function as a Web server for the PC 50 connected via the network, such as providing information stored in the nonvolatile memory 26. In addition, the CPU 25 executes processing for enabling control of home appliances and the like connected to the JEMA control unit 33 from the PC 50 connected via the network.

  The nonvolatile memory 26 stores various application programs executed by the CPU 25 and various data. Further, as described above, the information acquired from the remote monitoring control system for causing the interface device 20 to function as a Web server is also stored. The non-volatile memory 26 stores a thinning program in which a lighting policy and the like for thinning and lighting the lighting fixture 13 under the control of the transmission unit 10 are described.

(Processing of remote monitoring and control system)
Next, the control processing operation at the time of recovery when the main power supply is stopped in the remote monitoring control system including the interface device 20 having such a configuration will be described using the timing chart shown in FIG.

  FIG. 4A shows the power supply state of the main power supply AC and the backup power supply GC that supply power to the remote monitoring control system. A period T1 shown in FIG. 4A is a period in which the main power source AC is in an on state, and a period T2 is a period until the main power source AC is in an off state and switched to the backup power source GC, and the period T3 Is a rising period of the backup power supply GC to the ON state, and a period T4 is a period in which the backup power supply GC is in the ON state.

  FIG. 4B is a flowchart showing the control operation of the CPU 25 of the interface device 20, and FIG. 4C shows the control mode of the transmission unit 10. As shown in FIG. 4C, in the initial stage, the transmission unit 10 operates the remote monitoring control system in a normal mode that accepts an operation request from the multiplex transmission switch terminal 11 as valid.

  In step S1 shown in FIG. 4B, the CPU 25 detects from the voltage value detected by the voltage detection circuit 30 whether or not the main power supply AC in the on state has changed to the off state. The CPU 25 proceeds to step S2 when the main power supply AC stops and enters an off state, and continues the detection process of step S1 when the main power source AC remains on.

  In step S2, the CPU 25 reads the thinning program stored in the nonvolatile memory 26 in response to the main power supply AC being turned off from the period T1 to the period T2 shown in FIG. Based on the thinning program, the lighting apparatus 13 is thinned and lit, and a control signal is transmitted to the transmission unit 10 for requesting the shift to the forced mode that invalidates the operation request of the multiplex transmission switch terminal 11. Note that the backup circuit 28 guarantees a power failure until the power supply from the main power supply AC is stopped and switched to the backup power supply GC.

  The transmission unit 10 that has received the control signal transmitted from the transmission unit 10 shifts the control state from the normal mode to the forced mode as shown in FIG. 4C, and thins it out by the thinning program included in the control signal. Only the relay of the relay terminal 12 corresponding to the selected lighting fixture 13 is switched to the ON state. As a result, when the backup power supply GC starts up in the period T3 shown in FIG. 4A, only the designated lighting fixture 13 is turned on.

  In addition, when the transmission unit 10 shifts to the forced mode, the operation request for the multiplex transmission switch terminal 11 is invalidated. That is, even if the user operates the multiplex transmission switch terminal 11 to turn on the desired lighting fixture 13, this operation request becomes invalid, and only the lighting fixture 13 corresponding to the thinning program is turned on. Will continue. Therefore, even if the multiplex transmission switch terminals 11 are operated all at once in order to recover from the power failure state, it is possible to suppress the sudden current, thereby avoiding the situation where the main breaker is dropped.

  In the initial stage, the thinning program executed by the transmission unit 10 is configured so that, even if the lighting fixtures 13 are turned on all at once, only the number of lighting fixtures 13 that does not cause the main breaker to drop due to the sudden current is turned on. It is prescribed. Moreover, you may prescribe | regulate so that the number which makes the lighting fixture 13 light up gradually may be increased with time, and it may control to finally be in the state before a power failure. In this case, the CPU 25 collects information on the luminaire 13 that has been turned on before the power failure, and reflects this information in the thinning program.

  In step S <b> 3, the CPU 25 detects whether or not the backup power supply GC has changed from the off state to the on state from the voltage value detected by the voltage detection circuit 30. When the backup power supply GC is turned on, the CPU 25 proceeds to step S4, and when the backup power supply GC remains off, the CPU 25 continues the detection process of step S3.

  In step S4, the CPU 25 makes a request to return from the forced mode to the normal mode in response to the backup power supply GC being turned on from the period T2 shown in FIG. 4A to the period T4 after the period T3. A control signal to be transmitted is transmitted to the transmission unit 10.

  The transmission unit 10 that has received the control signal transmitted from the transmission unit 10 shifts from the forced mode to the normal mode as shown in FIG. 4C, and the operation request of the multiplex transmission switch terminal 11 is made valid. To do.

[Effect of the embodiment]
As described above, the remote monitoring control system shown as the embodiment of the present invention is connected to the backup power supply GC in response to the detection of the stop of the main power supply AC by the interface device 20 provided in the remote monitoring control system. In the startup period, a forced mode for permitting power supply from the backup power supply GC only to a load selected to be thinned out from the plurality of lighting fixtures 13 and invalidating an operation request from the multiplex transmission switch terminal 11 A control signal requesting the shift to is transmitted to the transmission unit 10.

  Thereby, since the transmission unit 10 turns on only the luminaire 13 thinned out by the thinning program that specifies the thinning pattern of the control signal, the transmission unit 10 significantly suppresses the sudden current that flows when switching to the backup power supply GC. Can do.

  The above-described embodiment is an example of the present invention. For this reason, the present invention is not limited to the above-described embodiment, and various modifications can be made depending on the design and the like as long as the technical idea according to the present invention is not deviated from this embodiment. Of course, it is possible to change.

It is a figure for demonstrating the structure of the remote monitoring control system shown as embodiment of this invention. It is a figure for demonstrating the format of the transmission signal transmitted in the said remote monitoring control system. It is the disassembled perspective view which showed an example of the external appearance structure of an interface apparatus. It is a timing chart for demonstrating the processing operation at the time of a recovery | restoration when the main power supply stops in the said remote monitoring control system.

Explanation of symbols

AC main power supply GC backup power supply 10 transmission unit 11 multiplex transmission switch terminal 12 relay terminal 13 lighting fixture 20 interface device 21 signal terminal 22 lighting control system transmission signal transmission / reception circuit 23 connection terminal 24 RS232C inter-host communication circuit 25 CPU (Central Processing) Unit)
26 Nonvolatile memory 27 Power supply circuit 28 Backup circuit 29 Power supply terminal 30 Voltage detection circuit

Claims (2)

A transmission unit, a switching terminal connected to the transmission unit via a signal line, a load control terminal for controlling a load, and a transmission signal transmitted from the transmission unit to the signal line by a multiplex transmission method. In the remote monitoring control system for controlling a plurality of loads specified by addresses set in association with the switch terminal and the load control terminal,
Supply state detecting means for detecting the power supply state of the power supplied to the remote monitoring control system;
In response to detecting the stop of power supply from the main power supply to the remote monitoring control system by the supply state detection means,
In the startup period of the backup power source that switches from the main power source, after transmitting a control signal requesting the transition to the forced mode to invalidate the operation request from the switch terminal device, from the plurality of loads It has been selected as thinned out, the rush current only to the number of loads that have never the main breaker of the remote monitoring and control system drops, and control means for controlling to allow the power supply from the backup power supply A remote monitoring and control system comprising an interface device. A transmission unit, a switching terminal connected to the transmission unit via a signal line, a load control terminal for controlling a load, and a transmission signal transmitted from the transmission unit to the signal line by a multiplex transmission method. An interface device connected to a remote monitoring control system for controlling a plurality of loads specified by addresses set in association with the switch terminal and the load control terminal,
Supply state detection means for detecting a power supply state of the power supplied to the remote monitoring control system;
In response to detecting a stop of power supply from the main power supply to the remote monitoring control system by the supply state detection means,
In the startup period of the backup power source that switches from the main power source, after transmitting a control signal requesting the transition to the forced mode to invalidate the operation request from the switch terminal device, from the plurality of loads comprising selected as thinned out, the rush current only to the number of loads that have never the main breaker of the remote monitoring and control system drops, and control means for controlling to allow the power supply from the backup power supply An interface device characterized by the above.

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