JP3301626B2 - Remote monitoring and control system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote monitoring control system.

[0002]

2. Description of the Related Art Conventionally, a central control unit is connected to a plurality of operation terminals and load control terminals via a pair of signal lines, and a time division multiplex transmission signal is transmitted from the central control unit. Access the terminal, apply load control data based on the operation data of the corresponding operation terminal to the load control terminal, and time-division multiplex the operation data for load control to the operation terminal. 2. Description of the Related Art There is a remote monitoring and control system including a monitoring and control system for returning a monitoring signal as a monitoring data during a reply waiting period provided for a transmission signal.

[0003] This system has the advantage that wiring can be reduced because only a pair of signal lines are required.

[0004]

However, the above-mentioned conventional remote monitoring and control system does not have a communication means for exchanging data with another remote monitoring and control system. The interlocking control over the area could not be performed. Therefore, in a conventional system, when performing interlocking control over a plurality of monitoring control systems, a contact output type control terminal controlled based on the operation of an operation terminal provided in a certain monitoring control system is required. The monitoring and control system provided in the monitoring and control system and having an interlocking relationship is provided with a contact input type operation terminal for taking in the contact output of the control terminal. In such a system, there is a problem in that a terminal device only for transferring the contact state is required, and an address and an installation space for the terminal device are required.

The present invention has been made in view of the above problems, and has as its object the purpose of transmitting and receiving data to and from each local control device so as to perform interlocking control and to communicate with a host system device. A network can be constructed between them, and the monitoring and control of each monitoring and control system is also possible with the host system equipment. Easy network wiring connection
In addition, the local control device and the network control device can be easily incorporated into the distribution board , and both control devices can be mounted.
The same main unit as the main unit
It is an object of the present invention to provide a remote monitoring control system that can be used as a material .

[0006]

[0007]

In order to achieve the above object, according to the present invention, a local control device, a plurality of operation terminals and a load control terminal are connected by a pair of signal lines. The terminal is accessed by transmitting a multiplex transmission signal from the local control device, and the load control terminal is provided with load control data based on the operation data of the corresponding operation terminal. A plurality of monitoring control systems for returning operation data for load control to the local control device as monitoring data during a reply standby period provided in a multiplex transmission signal, and a communication interface means for a higher-level system device and monitoring control Communication control means for the local control device of the system, and a communication port of each local control device is connected by a dedicated communication line to connect the host system equipment and each monitoring control system. The network controller to build a network with Karu controller provided, each local
The main unit of the control unit and the network control unit
The basic structure is the same and the dimensions are
With mounting means corresponding to the mounting rail
Two parts where terminals can be provided respectively
A connection terminal portion provided with, and an arrangement portion for providing another terminal,
Two connector arranging parts capable of providing connectors
Using a device body having
In the main unit, one of the connectors
Provide a communication connector for connecting the
The terminal section is connected to the signal line connection terminal for
Dedicated communication line input connection terminal corresponding to communication line communication port
And a feed wiring terminal is provided at
The above-mentioned connector is installed in the main unit of the network control device.
Communication connector for connecting an external device to one of the parts
And the above host system to the other connector
Communication connectors for connecting
Input connection of the local control device to one part of the slave unit
Provide connection terminals for connection via dedicated communication
It is a thing.

[0008]

[0009]

According to the present invention, there are provided communication interface means for a host system device and communication control means for a local control device of a supervisory control system. Each communication port of each local control device is connected by a dedicated communication line. A network controller for establishing a network between the host system equipment and the local controller of each monitoring and control system is provided, and each local controller has another communication port for exchanging data with the outside. The communication port can be used to transfer data between the local control devices of each monitoring control system under the communication control of the network control device, and to perform interlocking control over each monitoring control system. Since data can be exchanged between the device and the local control device of each monitoring and control system, Easy to perform load management of the upper system equipment. Two parts that can kick further set the terminal
Connection terminal part with a position
And two connectors that can be provided with connectors
Control device using a device body having a
In the device body for
Provide a communication connector for connecting external devices, and
The connection terminal section has a signal line connection terminal for multiplex transmission signals and the above
Dedicated communication line input connection corresponding to the dedicated communication line communication port
Connection terminals, and feed wiring terminals
In the network controller, the above connection
Communication connector for connecting external equipment to one of the
Connect the above system to the connector
Communication connectors for connecting
Insert the local control device into one of the connection terminals.
Connection terminal for connecting to the power connection terminal via dedicated communication
Provided, the local control device and network control
Change the number of terminals and connectors to be
By simply changing the housing, the housing that is the basic structure of the
It can be used as a passing member.

[0010] and connected by or local controller dedicated communication line between the connection between the local controller and the network controller performed easily, further connection and network controller and network controller and the local controller and the host Connection to system equipment is easy.

Furthermore with Fit device agreement dimensions of the distribution board of the body of the local control device and a network controller, it is provided with the attachment means corresponding to the mounting rail, minute local controller and network controller Easy installation inside the switchboard.

[0012]

The present invention will be described below with reference to examples. Figure 1 shows the overall configuration of an embodiment system, this system providing a plurality of monitoring control system, the local controller of the system each 1 ₁ ... The signal line 2 ₁ ... control terminal unit 3 through, A plurality of operation terminals 4 are connected. The network controller 3 is connected to each of the local controllers 1 ₁ .
The dedicated communication lines 31 from 0 are connected while being sequentially sent and wired. Further, the network control device 30 is connected via a communication line 41 to a host system device 40 composed of a host computer.

A maintenance tool 19 composed of a personal computer is connected to the local control device 1 ₁ ... Or the network control device 30 via a communication cable 60. As shown in FIG. 2, the local control device 1 includes a main CPU 5 that performs arithmetic control of the entire control device, a memory unit 7 connected to the main CPU 5 via a memory bus 6A, and an I / O bus 6B. RAMs 10 and 11 connected to each other and one RAM 1
A multiplex transmission unit 12 that can read and write data from and to the 0, a communication control unit 8 of RS485 that can read and write data from and to the other RAM 11, and an I / O bus 6B via an I / O unit 9. Local controller 1 connected
And a dip switch section 13 for channel setting.

The multiplex transmission unit 12 includes a sub CPU 14
And a multiplex transmission signal transmitting / receiving unit 15 and a memory 16 for storing a relation table between the operation terminal device 4 and the operation switch SW and the control terminal device 3 and the load L when performing pattern control or group control of the load L. And the sub-CP
The U 14 reads and writes data from and to the RAM 10 and controls transmission of the multiplex transmission signal and reception of the return signal through the multiplex transmission signal transmission / reception unit 15 and performs signal processing.

On the other hand, the communication control unit 8 as a communication port
The sub CPU 17 reads and writes data from and to the RAM 11 and controls transmission and reception of data by the RS 485 via the transmission and reception unit 18. The memory unit 7 is a main CPU 5 of the local control device 1.
A PROM storing a program necessary for the operation of the above, an SRAM for temporarily storing data, and an EEROM for storing other data.

The main CPU 5 has an RS 2 for exchanging data with an external maintenance tool 19.
A communication control unit 20 such as 32C is connected. RS is a reset IC that resets the main CPU 5 when the power is turned on. 3 to 5 show external views of the local control device 1. The device main body 21 is formed by the common dimensions of a distribution board, and a groove 22 for engaging a so-called DIN standard mounting rail is formed on the back surface. A power supply terminal 23 is provided at one end, and a connection terminal 25 composed of a signal line connection terminal 24 for a multiplex transmission signal, an input connection terminal 25a for a dedicated communication line 31, and a feed wiring terminal 25b is provided at the other end. Further, a connection connector 26 of the communication control unit 20 is provided on one side surface, and an operation window 27 of the DIP switch unit 13 is provided on the top surface. Reference numeral 28 denotes an operation knob for operating the locking claw 28a, which is locked to the mounting rail, when the apparatus main body 21 is removed from the mounting rail.

[0017] Next will be described the operation of the multiplex transmission unit 12 of the local control device 1 ₁ ... a. First, the multiplex transmission signal Vs transmitted from the multiplex transmission unit 12 to the signal line 2 has a start pulse S indicating the start of signal transmission as shown in FIG.
T, mode data MD indicating a signal mode, operation data to be accessed, address data AD indicating an address (8 bits) of the control terminals 4 and 3, control data CD indicating control contents for controlling the load L, and checksum data CS and a pulse width modulated double pole (±) composed of a response waiting signal WT for setting a response waiting period from the operation and control terminals 4 and 3.
24V) time-division multiplexed signal.

The multiplex transmission unit 12 is provided with a dummy signal transmitting means and an interrupt processing means. The dummy signal transmitting means constantly transmits the multiplex transmission signal Vs in which the mode data MD is set to the dummy mode. Further, when the interrupt signal Vi as shown in FIG. 6C is returned, the interrupt processing means returns the return data from the operation terminal 4 which has generated the interrupt signal Vi. That is, when the operation switch SW is operated, the operation terminal 4 sends an interrupt signal Vi in response to the operation. The multiplex transmission unit 12 transmits a multiplex transmission signal Vs for address search for each group address in order to search for the interrupted operation terminal 4 in response to the interrupt signal Vi. The interrupted operation terminal 4 returns its own unique address as return data when the group to which it belongs is accessed. By this return, the multiplex transmission unit 12 can determine the interrupted operation terminal 4, and then transmit the multiplex transmission signal Vs having the address data AD of the operation terminal 4 to transmit the multiplex transmission signal Vs. And the operation terminal 4 returns the state of the operation switch S as return data.

Based on the return data returned from the operation terminal 4 in this way, the multiplex transmission unit 12 creates control data to be transmitted to the control terminal 3 for controlling the corresponding load L, The control data is transferred to signal line 2
The load L is controlled by time division multiplex transmission to the control terminal 3 via the control terminal 3. As described above, in each monitoring control system, the multiplex transmission unit 12 of the local control device 1 monitors and controls each of the terminals 4 and 3.

FIGS. 7 and 8 show the circuit configuration of the terminals 3 and 4. The control terminal 3 performs full-wave rectification on the multiplex transmission signal Vs transmitted from the local controller 1 via the signal line 2. Power supply unit 50 for obtaining the power of the terminal device circuit from the obtained DC, receiving unit 51 for receiving the multiplex transmission signal Vs, and CPU 5 for performing signal processing and arithmetic processing of the entire terminal device circuit.
2 and an address setting unit 53 for setting an address unique to the terminal, and a reply drive circuit 54 for generating a reply signal and sending the reply signal to the signal line 2. The CPU 52 determines the content of the control data CD received when the address matches the set address,
The relay of the output circuit section 55 is controlled and its relay contact r ₁
It is adapted to turn on / off control of the load L by ~r _4.

When the CPU 52 of the operation terminal 4 detects a change in the operation signal of the operation switch SW connected to the input ports IN ₁ ... As shown in FIG. After the subsequent interrupt processing, when there is an access from the local control device 1, the operation data is returned as monitoring data through the return drive circuit 54.

The network control device 30 has a circuit configuration as shown in FIG. 9, and transmits and receives data to and from the sub CPU 33 in order to communicate with the host system device 40 instead of the multiplex transmission unit 12 of the local control device 1. Part 34
The configuration is basically the same as that of the local control device 1 except that the communication control unit 32 of the RS232C is provided. The same components as those of the local control device 1 are given the same numbers. Although the structure is basically the same, as shown in FIGS.
Is provided with only one set of connection terminals 25c. On one side surface, in addition to the connector 26 for the communication port of the communication control unit 20, the connector 29 for the communication port of the communication control unit 32 is provided. Has been added. Of course, there is no signal line connection terminal 24 for the multiplex transmission signal Vs. The same structural parts as those of the local control device 1 are denoted by the same reference numerals, and the side view is omitted.

Next, the overall operation shown in FIG. 1 will be described. In FIG. 1, when command data for a request for control or monitoring of the load L is sent from the host system device 40 to the network control device 30, the network control device 30 takes in the data at the transmission / reception unit 34 of the communication control unit 32. And stores the data in the RAM under the control of the sub CPU 33.
10 and the written data is stored in the main RAM 5
Is read, the command in the data is analyzed, and the command to which the local controller 1 ₁ ... Is addressed is determined, and a signal is transmitted by designating the channel of the corresponding local controller 1 ₁ . Specified local controller 1
According to the signal sent from the network controller 30 when its own channel is accessed, if the data is for load control, the control data CD corresponding to the corresponding control terminal 3 is transmitted. If so, the data indicating the state of the corresponding load L is
Send to

The network control device 30 converts the transmitted data into a higher-level protocol by the communication control unit 32 and transfers it to the higher-level system device 40. In this way, the control and monitoring of the load L of any monitoring control system can be performed from the host system device 40. Similarly, setting and confirmation of pattern control and group control can be performed from the host system device 40.

Further, the operation data of the operation terminal 4 of a certain supervisory control system can be transferred to the local control device 1 of another supervisory control system via the dedicated communication line 31 and the network control device 30. In other words, the interlock setting is performed in advance, and when the corresponding operation data is returned to the local control device 1 of the monitoring control system, the local control device 1 temporarily transfers the data to the network control device 30 via the communication control unit 8. The network controller 30 receives the data through the internal communication controller 8, analyzes the data with the main CPU 5, and further transfers the data to the local controller 1 in an interlocking relationship. The local control device 1 that has received the transferred operation data transmits control data CD based on the operation data to the control terminal 3 that is linked in advance,
The load L connected to the control terminal 3 is controlled. In this way, control and monitoring over a plurality of monitoring control systems can be performed.

[0026]

According to the present invention , the communication interface means for the host system device and the communication control means for the local control device of the supervisory control system which are constructed as described above are provided. the network controller for establishing a network between a host system equipment and the local control device of each monitor control system provided in connection with a dedicated communications line, another for the respective local control unit for performing data exchange with external Communication port , data can be exchanged between the local control devices of each monitoring control system using the communication port under the communication control of the network control device, and further, interlocking control can be performed across each monitoring control system. And exchange data between the host system equipment and the local control device of each monitoring and control system through the network control device. Can therefore easily there is an effect that allows the management of multiple load higher system equipment.

Each local control device and network
The basic structure is the same as the device body of the control device and
Dimensions are in accordance with the distribution board's agreement dimensions and are compatible with mounting rails
Mounting means, and terminals for each
Connection terminal with two parts that can be
It is possible to install a connector where the terminals are provided and a connector
Uses a device body that has two functional connector installation sites
In the device body for the local control device, the connector
One of the parts for installation is for communication for connecting external equipment
Of the multiplex transmission signal is provided at the connection terminal section.
Corresponds to the signal line connection terminal and the communication port of the dedicated communication line.
And a dedicated communication line input connection terminal
Is provided with a terminal for sending wiring, and is installed in the network controller.
On the main unit, connect an external device to one of the connector
Communication connector to connect the other connector
Communication connector for connecting the above host system
Are provided, and one of the connection terminal portions is
To the input connection terminal of the local control device via dedicated communication.
Connection terminals for connection
Provided as the device body of the device and the network control device
Just change the number of terminals and connectors to
The body part can be used as a common member, and the connection between the local control devices via a dedicated communication line and the connection between the local control device and the network control device can be easily performed. There is an effect that the connection with the local control device and the connection between the network control device and the host system device can be easily performed.

Further , since the configuration is as described above, the dimensions of the main body of the local control device and the network control device are adjusted to the agreement size of the distribution board, and the mounting means corresponding to the mounting rail is provided. There is an effect that the control device and the network control device can be easily mounted in the distribution board.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an overall configuration of an embodiment of the present invention.

FIG. 2 is a circuit configuration diagram of a local control device according to an embodiment of the present invention.

FIG. 3 is a top view of the local control device according to the embodiment of the present invention.

FIG. 4 is a side view of the local control device according to the embodiment of the present invention.

FIG. 5 is a front view of the local control device according to the embodiment of the present invention.

FIG. 6 is an explanatory diagram of a multiplex transmission signal according to one embodiment of the present invention.

FIG. 7 is a circuit configuration diagram of a control terminal according to an embodiment of the present invention.

FIG. 8 is a circuit configuration diagram of an operation terminal according to an embodiment of the present invention.

FIG. 9 is a circuit configuration diagram of a network control device according to an embodiment of the present invention.

FIG. 10 is a top view of a local control device according to an embodiment of the present invention.

FIG. 11 is a front view of a local control device according to an embodiment of the present invention.

[Explanation of symbols]

1 ₁ ... local control device 2 ₁ ... signal line 3 control terminal 4 operation terminal 30 network control device 31 dedicated communication line 40 host system equipment

Claims (1)

(57) [Claims] 1. A local control device, a plurality of operation terminals and a load control terminal are connected via a pair of signal lines, and a multiplex transmission signal is transmitted from the local control device to access the terminal. The load control terminal is provided with load control data based on the operation data of the corresponding operation terminal,
For the operation terminal device, a plurality of monitoring control systems for returning operation data for load control to the local control device as monitoring data during a reply standby period provided in the multiplex transmission signal are provided, and a communication interface means for a higher-level system device And a communication control means for the local control device of the supervisory control system. The communication port of each local control device is connected by a dedicated communication line to connect between the upper system device and the local control device of each supervisory control system. A network control device for constructing a network is provided, and each local control device and the network control device
The same basic structure and the same size
Attach the mounting means corresponding to the mounting rail
It is possible to provide a terminal for each
A connection terminal portion having two parts and an arrangement for providing other terminals.
Installation part and two connectors where a connector can be provided
Using a device body with a
In the device body for the control device, one of the
Is equipped with a communication connector for connecting external devices.
In addition, the connection terminal section has a signal line connection terminal for a multiplex transmission signal.
And the dedicated communication line corresponding to the communication port of the dedicated communication line
An input connection terminal is provided.
The network control unit has a connector
Communication connector for connecting an external device to one of the
The upper system to the other connector
Communication connectors for connection
Connect the input of the local control device to one of the terminals.
Connection terminals for connection to dedicated terminals via dedicated communication.
A remote monitoring and control system characterized by the fact that