JP3157876B2 - Remote monitoring control device - 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 device.

[0002]

2. Description of the Related Art Conventionally, in this type of remote monitoring control device,
A method is often used in which the body dimensions of each device used are formed in a contracted size corresponding to the size of the inner unit of the distribution board, and are housed in the distribution board.

[0003]

However, in this case, the storage space in the storage box becomes large, and the installation is troublesome. Although a mounting rail or the like can be used, the problem of the storage space has not been solved. The present invention has been made in view of the above-described problems, and a purpose thereof is to make a device to be housed in the same storage box in the form of a card in a remote monitoring control device, to facilitate installation, An object of the present invention is to provide a remote monitoring and control device that requires a small storage space.

[0004]

In order to achieve the above object, the present invention connects a local control device, a plurality of operation terminals and a load control terminal via a pair of signal lines, The terminal is accessed by transmitting the 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 the multiplex transmission signal are provided for the operation terminal device, and each local control device is provided with an external control system. a communication port for data exchange with, communication lines to the communication port of each local control unit and a communication control means for the local control device to the monitoring control system communication interface means for the upper system equipment also provided a network controller for establishing a network between a host system equipment in connected to the local control device of each monitor control system
Here , at least the device to be housed in the same storage box has a card configuration composed of a wiring board, and the card-like device is detachably mounted and stored in a mounting portion provided in the storage box.

[0005]

According to the present invention, at least the equipment to be housed in the same storage box is constituted by a card comprising a wiring board, and the card-like equipment is detachably mounted and stored in a mounting portion provided in the storage box. Therefore, mounting can be performed easily, and furthermore, the equipment can be made thinner, and the storage space can be reduced.

[0006]

The present invention will be described below with reference to examples. FIG. 2 shows the overall configuration of an embodiment system. In this system, a plurality of supervisory control systems are provided, and the local control devices 1 ₁ ... Of each system are connected to the control terminals 3 through signal lines 2 ₁ . A plurality of operation terminals 4 are connected. The network control device 7 is connected to each of the local control devices 1 ₁ .
, And are connected while sequentially sending and wiring dedicated communication lines 5. Further, the network control device 7 is connected via a communication line 8 to a host system device 6 composed of a host computer.

[0007] As shown in FIG. 3, the local control device 1 includes a main CPU 9 for performing arithmetic control of the entire control device,
Data can be read from and written to a memory section 11 connected to the main CPU 9 via a memory bus 10A, two dual-port RAMs 12 and 13 connected via an I / O bus 10B, and one RAM 13. A multiplex transmission unit 14, a communication control unit 15 of RS485 capable of reading and writing data from and to the other RAM 13,
A dip switch unit 17 for channel setting of the local controller 1 connected to the I / O bus 10B via the I / O unit 16.

The multiplex transmission unit 14 includes a sub CPU 18
And a transmission signal transmitting / receiving unit 19, 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, a state of the load L, and the like. The sub CPU 18 reads and writes data from and to the RAM 10, transmits the transmission signal Vs via the transmission signal transmission / reception unit 15, receives the return signal, and processes the data. ing.

On the other hand, the communication control unit 15
And a transmission / reception unit 22 of RS485,
Is configured to read and write data from and to the RAM 13 and to perform control processing of data transmission and reception by the RS485 via the transmission / reception unit 22. The memory unit 11 includes a PROM storing a program necessary for the operation of the main CPU 9 of the local control device 1, an SRAM for temporarily storing data, and an EEROM for storing other data.

The main CPU 9 has an RS 232 for exchanging data with an external maintenance tool.
A communication control unit 23 such as C is connected. Reference numeral 24 denotes a reset IC that resets the main CPU 9 when the power is turned on. FIG. 4 is an external view of the local control device 1. The electronic components constituting the circuit are mounted on a wiring board 25 made of a single printed circuit board to form a card. An edge connector 26 for connecting a power supply, a signal line 2 and a dedicated communication line 5 is formed at the center of one end, and the connection connector 27 of the communication control unit 23 is mounted at the center of the other end. are doing.

The operation of the multiplex transmission unit 14 of the local control device 1 is as follows. First, as shown in FIG. 5A, the multiplex transmission signal Vs transmitted from the multiplex transmission unit 14 to the signal line 2 includes a start pulse ST indicating the start of signal transmission, mode data MD indicating a signal mode, and operation operation for accessing. , Address data AD indicating the address (8 bits) of the control terminals 4 and 3, control data CD indicating the contents of control for controlling the load L, checksum data CS, and operation and control signals from the control terminals 4 and 3. The signal is transmitted as a pulse width modulated multi-pole (± 24 V) time-division multiplexed signal shown in FIG. 5B, which comprises a reply waiting signal WT for setting a reply waiting period.

The multiplex transmission unit 14 is provided with a dummy signal transmitting means and an interrupt processing means. The dummy signal transmitting means always transmits a 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. 5C 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 device 4 sends an interrupt signal Vi in response to the operation. In the multiplex transmission unit 14, this interrupt signal Vi
The transmission signal Vs for address search is transmitted for each group address in order to search for the operation terminal device 4 that has interrupted. 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 14 can determine the interrupted operation terminal 4, and then transmit the transmission signal Vs having the address data AD of the operation terminal 4 to switch the operation terminal 4. Access is made, and the state of the operation switch S is returned from the operation terminal 4 as return data.

Based on the return data returned from the operation terminal 4 in this way, the multiplex transmission unit 14 creates control data CD to be transmitted to the control terminal 3 for controlling the corresponding load L, and The load L is controlled by time division multiplex transmission of the control data CD to the control terminal 3 via the signal line 2 using the transmission signal Vs. As described above, in the supervisory control system, the supervisory control of each of the terminals 4 and 3 is performed by the multiplex transmission unit 14 based on the multiplex transmission signal Vs. The main CPU exchanges data with the outside.
Is transmitted and received between the sub CPUs 18 and 21 via the RAMs 12 and 13 by handshaking.

The network control device 7 has a circuit configuration as shown in FIG. 6, and transmits and receives data to and from the sub CPU 28 in order to communicate with the host system device 6 instead of the multiplex transmission unit 14 of the local control device 1. The configuration is basically the same as that of the local control device 1 except that the communication control unit 30 of the RS232C including the unit 29 is provided.
The same components are denoted by the same reference numerals. Also, since the mounting structure is basically the same, the drawing is omitted.

The devices 1 and 7 are stored in the same storage box 31 shown in FIG. A motherboard 32 on which the edge connectors 26 of the devices 1 and 7 are detachably mounted is provided in the storage box 31.
If the edge connectors 26 of these devices 1 and 7 are inserted into the device 2, electrical connection and mechanical fixing can be performed simultaneously.

In the storage box 31, a power supply unit 33,
Other necessary equipment is stored. 34 is the storage box 31
The door is pivotally supported at the opening of the door so that it can be opened and closed. Next, FIG.
Will be described. In FIG.
When command data for a request for control or monitoring of the load L is sent from the upper system device 6 to the network control device 7, the network control device 7 takes in the data at the transmission / reception unit 22 of the communication control unit 15, and sends the data to the sub-system. CPU
Under the control of 21, the written data is read by the main CPU 9, the command in the data is analyzed, and at the same time, the local control device 1 ₁ ... Send a signal by specifying the channel of 1 ₁ . The designated local control device 1 transmits control data CD corresponding to the corresponding control terminal 3 if it is load control data in accordance with a signal transmitted when its own channel is accessed from the network control device 7. On the other hand, if the request is a monitoring request, data indicating the state of the corresponding load L is sent to the network control device 7.

The network control unit 7 converts the transmitted data into a higher-level protocol by the communication control unit 30 and transfers it to the higher-level system device 6. In this way, the control and monitoring of the load L of any monitoring control system can be performed from the host system device 6. Similarly, setting and confirmation of pattern control and group control can be performed from the upper system device 6.

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 5 and the network control device 7. In other words, set the linked settings in advance,
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 7 via the communication control unit 8, and the network control device 7 performs the internal communication. Control unit 30
The data is analyzed by the main CPU 9 and further transferred to the local control device 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, and loads the load connected to the control terminal 3. Control L. In this way, control and monitoring over a plurality of monitoring control systems can be performed.

In the above embodiment, both devices 1, 3 are arranged in a card form.
Although only the terminal device 3 is formed, the terminal device 3 to be stored in the storage box 31 may of course be formed in a card shape.

[0020]

According to the present invention, at least the equipment to be housed in the same storage box is constituted by a card composed of a wiring board, and the card-shaped equipment is detachably mounted and stored in a mounting portion provided in the storage box. Therefore, there is an effect that mounting can be easily performed, and furthermore, the device and apparatus can be made thinner and the storage space can be made smaller.

[Brief description of the drawings]

FIG. 1 is a perspective view of a storage box according to one embodiment of the present invention.

FIG. 2 is a configuration diagram showing an overall configuration of an embodiment of the present invention.

FIG. 3 is a circuit configuration diagram of a local control device according to an embodiment of the present invention.

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

FIG. 5 is an explanatory diagram of a multiplex transmission signal according to one embodiment of the present invention.

FIG. 6 is a circuit configuration diagram of a network control device according to one embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Local control device 7 Network control device 25 Wiring board 31 Storage box 32 Motherboard

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,
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 for the operation terminal device, and each local control device is provided with an external control system. a communication port for data exchange with, communication lines to the communication port of each local control unit and a communication control means for the local control device to the monitoring control system communication interface means for the upper system equipment also provided a network controller for establishing a network between a host system equipment in connected to the local control device of each monitor control system
It is characterized in that at least the equipment to be housed in the same storage box has a card configuration comprising a wiring board, and the card-shaped equipment is detachably mounted and stored in a mounting portion provided in the storage box. Remote monitoring control device.