JPH0749704A - Input/output processing system for communication equipment - Google Patents

Abstract

PURPOSE:To process communication processing at real time, to improve a response and to restore a logical line generating communication abnormality by adding a communication line state monitoring function to structure consisting of a communication I/O processing part and a control processing part, and at the time of detecting abnormality, integrating an analytical restoring circuit for executing restoring processing or the like. CONSTITUTION:In communication software for a communication line equipment, an instrumenting specific communication task 4 receives information transmitted from a controlling and processing device, a controlling and processing task 3 edits the received information as a master informing text and transfers the edited text to a transmission task 1 to execute transmitting processing. When a receiving task 7 receives a response text from an opposite client/server system, a reception monitoring processing part 9 is executed. If abnormality is generated in any of transmitting and receiving processing, a monitoring and analytical processing part 6 is started to execute analytical processing and restart communication. Consequently communication function specification can be simplified and a reliable function can be attained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a process control system and communication processing connected to a client / server system on a network for controlling and monitoring the process control system, and is suitable for plant automation and labor saving mainly for integration. The present invention relates to a communication input / output processing device for a distributed digital instrumentation system communication device.

[0002]

2. Description of the Related Art In a conventional apparatus, a communication processing function prepared in a plant operation and monitoring console has a communication input / output processing section and a control processing section, each of which is a single unit, and when a text is received, information is transmitted to the control processing section. Is a simple method of executing one-to-one response processing by a method of performing data analysis processing after editing the response text, editing the response text, and then moving to the communication input / output processing section to perform transmission processing. It is a function that does not consider the operating status and line status of the higher-level computer. Abnormal processing is a simple function that resends using time monitoring that is aware of the response, and communication will not be possible after the partner high-level computer returns to normal. However, it has a drawback that it lacks reliability in communication. Further, it has a structure similar to that of network communication for OA, and is generally a process in which the communication response of the process instrumentation system and the importance of communication are not so conscious.

In this method, in particular, when the communication server executes the communication process by monitoring the operating state of the partner server system and the line condition, the line is established before the communication timing and the communication with the partner server system is performed only by the transmission / reception process. In order to improve the response and take communication error due to server system or line error, disconnection of the line, line initialization, instead of repeating the simple retransmission process.
The line is reconnected and restored, and communication processing is possible again. This content is being improved with a focus on reliability and labor saving.

If the communication method, the equipment are simple, and the communication processing is not so important, the conventional technique is sufficient. However, there were many problems that it became difficult to deal with the situation as the importance of communication information gained due to the large scale, complexity and integration of the system.

In particular, recovery from an abnormal state such as a case where communication is disabled has been forced to perform an involuntary operation for a user who has to perform it manually.

[0006]

The above-mentioned conventional technique supports communication with a configuration in which a communication input / output unit and a control processing unit are integrated, and is a technique that has flowed from the era of conventional specific line communication. However, for users who see the integration, communication with the instrumentation system is applicable, and a method that can be easily handled is desired, and there has been a transition to a time when there is no system without simple communication support. . In the above-mentioned conventional technology, it is not an easy function for the user to use, and it has been impossible to quickly and appropriately perform appropriate measures for the user. In that sense, the above-mentioned conventional technique uses a lot of information that can only be done by the engineer in charge and is not opened to the user, and there is a problem that it is inconvenient to deal with the occurrence of an abnormality.

An object of the present invention is to enable real time communication processing for transmitting information of the digital instrumentation system to the client / server system of the other party, or for receiving information from the host computer of the other party, and also to improve the response, and communication abnormality. The purpose is to automatically analyze the time and restore the logical line that caused the communication error, and build and provide a function that does not require human labor.

[0008]

In order to achieve the above object, a communication input / output processing unit and a control processing unit are provided as an internal mechanism in a gateway unit (GWU) which is a window for higher-level communication processing of a distributed digital instrumentation system. The communication line status monitoring function is added to the structure consisting of the following to establish a communication line, monitor the line status for each communication, and monitor the status of the partner client / server system. It incorporates an analysis recovery circuit that executes recovery processing from an abnormality. This enhances the communication processing functionality that is regarded as important.

[0009]

[Operation] The input / output processing monitoring mechanism for network communication with the host computer of the digital instrumentation system monitors the status of the partner host computer when the system starts up, performs connection processing of the line when connection is possible, and detects abnormalities. Keep connected unless detected. This eliminates the connection process and disconnection process for each communication, and maintains a highly responsive communication form. Further, when a line or partner error is detected, the present line is disconnected, the line connection information is initialized, the line is connected again, the line is established, and then the communication process is retransmitted. This makes it possible to improve the real-time communication response during online communication execution. In addition, general network communication requires the system to be restarted if a line error occurs while the other server is connected, but it has the advantage that it can be deleted. Due to the above, recent system integration (CI
M) As a central part, it is functioned as a reliable mechanism from the functions of OA level required for human operation for client / server communication on the network.
It becomes a form with higher utility value.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 shows an internal mechanism of communication software of a dedicated communication device embodying the present invention, FIG. 2 is a flowchart of a main part of the present invention, and FIG. 3 is a dedicated communication device to which the present invention is applied, a distributed digital instrumentation system, Fig. 4 shows an example of the configuration of the partner client / server system. Fig. 4 shows an example of the connection between the dedicated communication device incorporating this function and the partner client / server system, the line processing in the communication processing, and the text transmission / reception processing after the occurrence of an error in the upper central processing unit Is shown as an example.

The distributed digital instrumentation system includes a process monitor 40 and a process controller 42 as shown in FIG.
However, a large number are connected via the instrumentation system communication line 41. Generally, the number of installed process monitoring devices 40 and process control devices 42 is from the minimum configuration of 1 + 1 to 16 + 32 or more. There are various configurations, up to the scale configuration. The dedicated communication device 39 is connected to the instrumentation system communication line 41, and is configured to be able to refer to control data, monitoring data, file data and the like.

The main body has a transmission task 1, a control processing task 3, an instrumentation specific communication task 4, and a reception task 7 shown in FIG. 1, which are the same as the normal communication processing. The processing unit 8 and the receiving task have a configuration in which a reception monitoring unit 9 and a monitoring analysis processing task 6 are added.

The instrumentation specific communication task 4 receives the information transmitted from the control processing device, and this information is received by the control processing task 3.
Edits the text for higher level report, passes the sending task 1, and executes the sending process. At this time, the transmission monitoring processing unit 8 is executed. Further, it is the receiving task 7 that receives the response text from the partner client / server system, and the receiving monitoring processing section 9 is also executed at this time. If an abnormality occurs in any of the transmission / reception processing, the monitoring / analysis processing 6 is activated to perform an accurate analysis and corrective action to restart the communication.

An abnormality handling process of this process is shown in a flow chart of the monitoring analysis process task 6.

Next, the features of the present invention will be described with reference to an embodiment in which the communication between the partner client / server system of FIG. The communication-dedicated device 45 uses the other client / server system 4 as in the system startup.
The line connection 48 with 3 is executed to establish the line. However, after that, the upper central processing unit 43 started up in a state where the power failure 53 occurred and the communication line information was initialized. In this state, the control device 47 transmits the information to be reported to the partner client / server system 43 to the dedicated communication device 45, and the upper report text 51 transmits 52. However, the line condition is abnormal and the transmission process is abnormal. In this process, in order to solve such a situation, if a transmission error occurs, the line is disconnected 54, initialization is performed, and
A process of visually observing the return of communication was devised by the method of executing the line connection 55 and retransmitting 57 the currently edited upper report text 51. This eliminates loss of important text information and long-term communication failure.

[0016]

Since the present invention is constructed as described above, it has the following effects. When monitoring the operation of processes in the client / server system, monitoring of lines in network communication processing,
By monitoring the operating state of the partner computer and judging and processing the corresponding processing when an abnormality is detected, the use of the communication function is simplified and the function becomes reliable. The use of the present invention can be applied to simple communication to large-scale general-purpose communication, and becomes more effective as the communication device and the line become more complicated. Therefore, there is an effect of improving operability, operability, reliability, and maintainability of communication in process operation / monitoring.

[Brief description of drawings]

FIG. 1 is a software mechanism diagram in a communication processing device according to an embodiment of the present invention.

FIG. 2 is a flowchart of a main part of FIG.

FIG. 3 is a communication dedicated device to which the present invention is actually applied;
It is a figure which shows the structural example of a distributed digital instrumentation system and a partner client / server system.

FIG. 4 is a diagram showing a connection between a higher-level central processing unit and a distributed digital instrumentation system connected to a line and communication processing.

[Explanation of symbols]

1 ... Transmission task, 2 ... Transmission text area, 3 ... Control processing task, 4 ... Instrumentation specific communication task, 5 ... Reception text area, 6 ... Monitoring analysis processing task, 7 ... Reception task,
8 ... Transmission monitoring unit, 9 ... Reception monitoring unit, 10 ... Analysis information passing processing route, 11 ... Transmission / reception processing monitoring route.

Claims (1)

[Claims] 1. A digital instrumentation system upper communication support gateway unit (GWU) comprising a communication input / output processing device and a control processing device, having means for performing communication processing with a client / server system on a network, Communication I / O processing unit adds communication monitoring unit that executes monitoring process of communication line status and server operating state and recovery process by monitoring information analysis and establishes line, disconnects line in case of abnormality, and reconnects An input / output processing method for a communication device, which is characterized by a mechanism having means for automatically performing processing and restoring a communication line to execute communication processing.