JPH039697A - Remote supervisory and controlling equipment - Google Patents

Abstract

PURPOSE:To connect a host CPU to any required plant equipment and to realize the supervisory system of high reliability by providing the same data equipments in geographically distant plants and connecting the data equipments by communication lines and LAN. CONSTITUTION:LAN/line controllers 1a-1c are connected to the adjacent plant equipments by communication lines 2a-2c and connected to data processors 4a-4c in the same plant by LAN 3a-3c. In such a distributed processing type remote supervisory and controlling equipment, all messages are exchanged by the LAN/line controllers 1a-1c. Namely, when the messages are transmitted to devices in the side of the data processors 4a-4c, the messages are transmitted to a line controller which is connected to the LAN 3a-3c. The line controller executes the exchange of the message according to the contents of the message. Thus, the message can be transmitted.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a remote monitoring and control device for various industrial plants.

[Conventional technology]

FIG. 4 shows a configuration diagram of a conventional remote monitoring and control device.

Conventionally, this type of remote monitoring and control equipment has installed a telemeter/telecontrol (hereinafter referred to as TM/TC) slave station device 7 for each plant facility, and connected it to a TM/TC master station device 6 at the management center via a communication line 2. It was combined with

The functions of the TM/TC slave station device 7 are mainly inputting monitoring data from the plant, transmitting it to the TM/TC master station device 6, and transmitting control command signals received from the TM/TC master station device 6 to the plant. It was limited to the function of interfacing the communication line 2 called output with the plant.

Therefore, all man-machine interface functions such as displaying data, inputting control operations, long-term storage of data, and printing out events are realized in the host CPU 5 located above the TM/TC master station device 6 of the management center.

[Problem to be solved by the invention]

In the conventional remote monitoring and control device described above, all the functions of the man-machine interface are concentrated in the host CPU, so an abnormality in the host CPU or TM/TC master station device can lead to a failure of the entire device, resulting in poor reliability. There was a problem that this resulted in a decrease in .

In addition, all communication lines are concentrated at the management center, so when installing the host CPU in other plant equipment, it is necessary to set up a new communication line, and information is transferred to the TM/TC parent of the management center. Since the data is routed through the station device, there is a problem in that the host CPU becomes unusable due to an abnormality in the master station device.

[Means to solve the problem]

The remote monitoring and control device of the present invention is a remote monitoring and control device that centrally monitors and controls geographically separated plant equipment at a management center, in which each plant is provided with a data processing device with the same function, and communication Connected and configured by lines and local area networks.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 shows the configuration of an embodiment of the present invention.

1a to IC are LAN/line control devices that are connected to adjacent plant equipment through communication lines 2a to 2C, and are connected to data processing equipment 4a to 4C in the same plant equipment by local area networks 3a to 3C. Connected.

In this distributed processing type remote monitoring and control device, all messages are exchanged between the LAN/line control devices 1a to IC. That is, when the data processing devices 4a to 4C send a message to another device, the LAN/line control device 1 connected to the same local network 3a to 3C must be used.
a~ Send to IC. LAN/line control device 1a~IC
exchanges messages based on the information in the messages. Thereby, the data processing devices 4a to 4C can transmit messages without being aware of which station the destination is physically connected to.

The format of messages sent and received between devices is
As shown in the figure.

As addresses for recognizing devices, there are station addresses and addresses assigned to plant equipment for each LAN/line control device, and device addresses assigned to each device within the station.Messages include addresses that indicate the destination and source, and message functions. A message number indicating the message is stored. LAN・
The line control devices 1a to 1c have information about the station configuration, that is, whether the station is on the right or left side of the local station, and which devices are connected to a certain station. Messages are exchanged by comparing the destination address.

Additionally, special destination addresses can be treated as broadcast transmissions, and the same message can be sent to all devices.

The procedure for exchanging messages in the LAN/line control device 1b will be explained with reference to FIG.

The LAN/line control device 1b receives a message from the communication lines 2a, 2b or the local area network 3b (step 11). The destination station address is extracted from the received message, and it is first checked whether it is a broadcast message (step 12).

If it is a broadcast message (step 13), the source station address is extracted and checked (step 20). If this is your own station (step 21), it will send the message to the lines on both sides (step 24), and if it is a station on the right side of your own station (step 21), it will send the message to the left line (step 24). 22), and conversely, if the transmission source is the station on the left, it is transmitted to the station on the right (step 23). Thereafter, the data is also transmitted to the data processing apparatuses connected to the local area network 3b of the own station (not shown) that are not the transmission sources (step 25).

If the message is not a broadcast message (step 13) and the destination station address is your own station (step 14), refer to the destination device address and send the message to the corresponding device connected to the local area network 3 of your own station. Send (step 19). If the destination is another station, determine whether it is on the right or left side of the local station (step 15), and transmit to the line in that direction (steps 16, 17, 18>).
- The message exchange operation in the line control device 16 ends.

On the other hand, regarding monitoring data, for example, the data processing device 4
b periodically collects monitoring data from the plant, sets the data in a broadcast message, and notifies the other data processing devices 4a and 4c. In addition, other data processing devices 4a,
The monitoring data is received from 4c and held in the storage section within the own device. In other words, the data processing devices 4a to 4C retain all monitoring data within themselves, and based on this, long-term storage of data in external storage and CR of monitoring data are performed.
Display on the T screen. These functions make it possible to realize a remote monitoring function.

Further, remote control can be performed by setting control command information input by an operator using a keyboard into a message and transmitting the message to a data processing device that outputs a control signal.

〔Effect of the invention〕

As explained above, the present invention allows a host CPU to be connected to any necessary plant equipment, and also enables remote monitoring and control in any data processing device when an abnormality occurs in the host CPU. Because it is stored for a long time, it has the effect of achieving higher reliability compared to conventional remote monitoring and control equipment.

Furthermore, even when a communication line is disconnected or an abnormality occurs in a certain station's LAN/line control device, it is possible to operate in a divided form.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of an embodiment of the present invention, Fig. 2 is a message format, Fig. 3 is a message exchange procedure of a LAN/line control device, and Fig. 4 is a block diagram of a conventional remote monitoring and control device. be. 1a-1c...LAN/line control device, 2a-2C/
...Communication line, 3a-3c...Local area network, 4a-4c...Data processing device, 5...Host CPU, 6...TM/TC master station device, 7...T
M/TC slave station device.

Claims (1)

[Claims] In a remote monitoring and control device that centrally monitors and controls geographically separated plant equipment at a management center, each plant is equipped with a data processing device with the same function and connected by a communication line and a local area network. A remote monitoring and control device characterized by: