JP2000181528A - Plant monitoring system - Google Patents

Abstract

(57) [Problem] To provide a plant monitoring system capable of monitoring a plant by TCP / IP communication without preparing an apparatus having a process control standard interface. SOLUTION: This apparatus has a process control standard interface, and obtains process data from a plant by a process server means.
A data source server means for acquiring process data via a process control standard interface and exposing the process data via a TCP / IP socket interface.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling a TC without using an apparatus having a process control standard interface.
The present invention relates to a plant monitoring system capable of monitoring a plant by P / IP communication.

[0002]

2. Description of the Related Art In a conventional plant monitoring apparatus, a dedicated terminal monitors a plant through a closed network and controls the plant. Such an apparatus is shown and described in FIG.

In the figure, a field control
The station FCS monitors the plant 1 and
Control. The operator station OPS obtains process data from the field control station FCS via the control bus B constructed by a unique network protocol, and controls the plant 1 for the field control station FCS. Outputs control signal. The operator station OPS has graphic screen means GR. The graphic screen means GR acquires process data from the field control station FCS and draws a plant monitoring screen.

[0004] The operation of such a device will be described below.
The observer operates the dedicated operator station O
The PS is operated to activate the graphic screen means GR.
The graphic screen means GR acquires process data from the field control station FCS,
Draw the plant monitoring screen.

[0005]

However, in recent years, OPC
(OLE (Object Linking and Embedding) for Process Co
A process control standard object access interface called the ntrol) interface has been defined. This OPC interface is beginning to be adopted in field control stations created by different companies. As a result, it is now possible to acquire process data of other field control stations and draw a plant monitoring screen without preparing a dedicated terminal unique to each company.

However, the OPC interface has become a standard in the field of process control. However, when an instrumentation engineer or a manager wants to perform field monitoring from office work or the like,
There is a problem that a device having an OPC interface must be prepared.

[0007] Therefore, an object of the present invention is to provide a T control system without preparing an apparatus having a process control standard interface.
An object of the present invention is to realize a plant monitoring system capable of monitoring a plant by CP / IP communication.

[0008]

According to the present invention, there is provided a process server having a process control standard interface, for acquiring process data from a plant, and transmitting process data from the process server via a process control standard interface. Data source server means for obtaining and acquiring process data through a TCP / IP socket interface.

According to the present invention, the process server collects process data from the plant. The data source server means acquires the process data from the process server means via the process control standard interface, and publishes the process data via the socket interface.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram showing one embodiment of the present invention. In the figure, the field control station F
The CS1 to FCS3 are connected to the Ethernet L1 to monitor and control a plant (not shown). Field control stations FCS1 to FCS3
Have OPC (process) server means 2 to 4, respectively. The OPC server means 2 to 4 have OPC (process control standard) interfaces 21, 31, and 41, respectively, and acquire process data from the plant.

The server 5 comprises a data source server means 50
And connected to Ethernet L1 and L2. The data source server means 50, from the OPC server means 2-4,
The process data is acquired via the OPC interface 51 and the TCP / IP (Transmission Control Protocol) is acquired.
The process data is disclosed by the socket interface 52 of col / Internet Protocol).

The PC machine 6 is connected to the Ethernet L2 and has Java program means 61 and a socket interface 62. The Java program means 61 accesses the socket interface 52 via the socket interface 62, and the data source server means 50
Get the process data from and display the plant monitoring screen. (Note that Java is a trademark or registered trademark of Sun Microsystems, Inc. in the United States and other countries.)

The UNIX machine 7 is connected to the Ethernet L2 and has a socket base program means 71 and a socket interface 72. The socket base program unit 71 accesses the socket interface 52 via the socket interface 72, acquires process data from the data source server unit 50, and displays a plant monitoring screen. (Note that UNIX
Is a registered trademark in the United States and other countries licensed by X / Open Company Limited. )

The operation of such a device is described below.
The OPC server means 2 to 4 respectively collect process data from the plant. And the data source server 5
Accesses the OPC interfaces 21, 31, and 41 via the OPC interface 51, and acquires process data from the OPC server means 2 to 4.

Java program means 61 of PC machine 6
Accesses the socket interface 52 via the socket interface 62, acquires process data from the data source server 50, and displays a plant monitoring screen.

Further, the socket base program means 71 of the UNIX machine 7 accesses the socket interface 52 via the socket base interface 72, acquires process data from the data source server 50, and displays a plant monitoring screen.

As described above, the data source server means 50
However, since the OPC interface 51 collects process data from the OPC server means 2 to 4 and publishes the process data through the socket interface 52, plant monitoring can be performed by TCP / IP communication. That is, plant monitoring can be performed by an apparatus that does not include the OPC interface.

Another embodiment will be described with reference to FIG.
Here, the same components as those in FIG. 1 are denoted by the same reference numerals, and description thereof is omitted.

In FIG. 1, a hard disk HD is connected to a server 5 and is provided with an HTML (HyperText Markup Language).
e) File 53 and Java Appl as program file
et54 are stored.

The Java Applet 54 is a WW of the PC machine 6
It is created by a general-purpose program (Java language) used in the W (World Wide Web) browser means 63, and describes a drawing display instruction and an instruction for calling process data from the data source server means 50 through a socket interface. Also, the HTML file 53 is a Java Applet
54 call instructions are described.

The WWW server means 55 is provided in the server 5, communicates by HTTP (HyperText Transfer Protocol), and publishes the HTML file 53 and the Java Applet 54.

The operation of such an apparatus will be described below.
The OPC server means 2 to 4 respectively collect process data from the plant. And the data source server 5
Accesses the OPC interfaces 21, 31, and 41 via the OPC interface 51, and acquires process data from the OPC server means 2 to 4.

The WWW browser means 63 requests the WWW server means 55 to read the HTML file 53. The WWW server means 55 includes a hard disk H
The HTML file 53 is read from D and sent to the WWW browser means 63. The WWW browser means 63 is HT
The ML file 53 is read, and the HTML file 53 is read.
, The reading of the Java Applet 54 is requested to the WWW server means 55. The WWW server means 55 reads the Java Applet 54 from the hard disk HD,
Send it to WWW browser means 63.

The WWW browser means 63 is a Java Applet
According to the instruction of 54, the socket interface 52 is accessed via the socket interface 62, and process data is acquired from the data source server means 50. According to the process data, the WWW browser means 6
3 draws a plant monitoring screen according to a drawing command of the Java Applet 54.

As described above, the data source server means 50
However, since the process data is disclosed from the socket interface 52, the plant monitoring screen can be displayed by the WWW browser means 63 using the Java Applet 54. In other words, it is possible to display the program without depending on the OPC without preparing a program for plant monitoring in the client in advance.

[0026]

According to the present invention, the following effects can be obtained. According to claim 1, the data source server means collects the process data from the process server means by the process control standard interface and publishes the process data by the socket interface.
Plant monitoring can be performed by CP / IP communication. That is, plant monitoring can be performed even with an apparatus that does not include the process control standard interface.

According to the second aspect, since the data source server means publishes the process data through the socket interface, the plant monitoring screen can be displayed by the WWW browser means using a general-purpose program.
In other words, it is possible to display the program without preparing a program for plant monitoring in the client in advance and without depending on the process control standard interface.

[Brief description of the drawings]

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

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

FIG. 3 is a diagram showing a configuration of a conventional plant monitoring system.

[Explanation of symbols]

 2-3 OPC server means 21, 31, 41, 51 OPC interface 50 Data source server means 52, 62 Socket interface 53 HTML file 54 Java Applet 55 WWW server means 63 WWW browser means

Claims (2)

[Claims] 1. A process server means having a process control standard interface and obtaining process data from a plant, and obtaining process data from the process server means via a process control standard interface,
And a data source server for publishing process data through a socket interface of / IP. 2. A program file created by a general-purpose program used in a WWW browser means, in which a drawing display instruction and an instruction for calling process data from a data source server means by a socket interface are described, and a call instruction for the program file Where H is described
2. The plant monitoring system according to claim 1, further comprising: a WWW server for communicating with the TML file by HTTP and exposing the HTML file and the program file.