JP4582490B2 - Communication data display device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a communication data display device that analyzes and displays communication data on a line connected to a communication line.
[0002]
[Prior art]
Conventionally, in the installation and maintenance of a network system, a communication data display device is used as means for analyzing the content of communication data at the time of normality / abnormality determination of received data and when an abnormality is detected. In such a communication data display device, the process of accumulating communication data in the storage device in time series and the display process of the accumulated data cannot be executed simultaneously, and the data display is performed offline after the data collection is completed. Was.
[0003]
[Problems to be solved by the invention]
In general, a communication protocol used in a control system is composed of cyclic transmission and asynchronous event transmission, but a message used in cyclic transmission has a fixed length and a fixed format. For example, SERCOS (IEC1491) performs cyclic transmission between one master station and N slave stations, but in the process of communication initialization, the message structure used for cyclic transmission is the master station and slave station. Negotiate between stations, and after initialization is complete, send and receive fixed format messages. This fixed format message includes bit data such as switch ON / OFF instructions and contact input status.
However, in order to observe such bit data, the conventional communication data analysis and display device needs to analyze while extracting only the corresponding bit data portion of the received data stored in time series.
In addition, since the data display is performed offline, a dedicated application program had to be developed in order to observe the input signal status online.
The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a communication data display device that can monitor and display cyclic data online without a program.
[0004]
[Means for Solving the Problems]
In order to solve the above problems, the present invention provides a communication control device that inputs communication data on a communication line, a communication data collection unit that converts communication data received from the communication control device into a predetermined data format, A storage device that holds communication data output from the communication data collection unit, an information processing device that performs communication data analysis on communication data held in the storage device in accordance with predetermined items, and the information processing A communication data display device comprising: a display device for displaying an analysis result analyzed by the device; an input device for converting display format setting data input by an operator into a display format having a predetermined signal format; and the input Display format setting part that converts the display format input from the device into a predetermined data format, and the display format that registers the input display format A memory unit, a cyclic data storage unit for storing only cyclic data from the received data for each transmitting station according to an operation instruction from the input device when the information processing device operates in a monitor mode, and the information A trace data storage unit for storing data received in a time series when the processing device operates in the trace mode, and communication data held in the storage device in a display format registered in the display format storage unit Therefore, the information processing apparatus includes: a communication data analysis unit that analyzes and generates display data; and a display control unit that controls the communication data analysis unit to display display data generated from stored data for each station. By switching to the monitor mode according to an operation instruction from the input device, only cyclic transmission data is displayed in the table. It is obtained so as to display on the device.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a block diagram of a communication data display apparatus showing an embodiment of the present invention.
In the figure, 1 is an input device, 2 is a storage device, 3 is an information processing device, 4 is a communication control device, 5 is a display control unit, and 6 is a display device.
Among these, the storage device 2 includes a cyclic data storage unit 22 and a trace data storage unit 23 in addition to the display format storage unit 21. The display format storage unit 21 registers the input display format, and the cyclic data storage unit 22 uses the received data according to an operation instruction from the input device when the information processing device 3 operates in the monitor mode. Only cyclic data is stored for each transmitting station, and the trace data storage unit 23 is for storing data received in time series when the information processing apparatus 3 operates in the trace mode.
The information processing apparatus 3 includes a display format setting unit 31, a communication data analysis unit 32, and a communication data collection unit 33.
The input device 1 converts the display format setting data input by the operator into a predetermined signal format and transmits it to the display format setting unit 31 of the information processing device 3. The display format setting unit 31 converts the display format input from the input device 1 into a predetermined data format and outputs it to the storage device 21. The storage device 21 holds a display format.
Further, the input device 1 receives start / stop of collection of received data from the operator and selection input of the operation mode of the information processing device, and also transmits it to the information processing device 3.
The communication control device 4 performs input control for receiving transmission data on the communication line 7 and transmitting it to the information processing device 3. The communication data collection unit 33 converts the communication data received from the communication control device 4 into a predetermined data format and outputs it to the storage device 2.
As the output destination at this time, either the cyclic storage unit 22 or the trace data storage unit 23 is selected according to the operation mode input from the input device 1.
Both the cyclic storage unit 22 and the trace data storage unit 23 hold communication data.
When the information processing device 3 is operating in the monitor mode, communication data is input from the storage device 2 and a display format is input from the display format storage unit 21.
Here, either the cyclic storage unit 22 or the trace data storage unit 23 is selected as the communication data input source depending on the operation mode of the information processing apparatus 3. The communication data analysis unit 32 creates display data from the input communication data according to the input display format and outputs the display data to the display control unit 5.
At this time, when the operation mode of the information processing apparatus 3 is the monitor mode, the communication data analysis unit 32 instructs the display control unit 5 to overwrite and display the previous value of the received data with the current value of the received data.
The display control unit 5 performs display control of the input data signal. The display device 6 displays input information according to the control of the display control unit 5.
FIG. 2 is an example of a storage format of cyclic transmission reception data stored in the cyclic data storage unit 22 in FIG.
In the present embodiment, it comprises a reception buffer 222 for storing cyclic data divided for each transmission station, and a reception buffer pointer table 221 including pointers to the respective reception buffers.
The reception buffer pointer table 221 is used to extract a corresponding reception buffer from the transmission source address of reception data when cyclic data is received in the monitor mode.
The reception buffer includes a storage area for a transmission source address, reception status, time stamp, and reception data length in addition to an area for storing reception data.
The received data is always overwritten and updated with the latest received data during the monitoring operation.
[0006]
Next, the operation of this embodiment will be described with reference to FIG.
FIG. 3 is a flowchart for explaining the operation of the information processing apparatus 3 in FIG.
(Step S <b> 1) The information processing apparatus 3 inputs a display format and registers it in the display format storage unit 21 in advance.
(Step S2) Upon receiving a communication data analysis request, analysis of communication data is started.
(Step S3) If the request at this time is a monitor request, the information processing device 3 enters the monitor operation mode, and the switch 32a and the switch 33a are connected to the cyclic data storage unit 22 of the switching storage device 2.
(Step S13) When the request is a trace request, the trace data storage unit 23 of the storage device 2 is connected.
(Step S4) Next, the information processing apparatus 3 stands by until communication data is input.
(Step S5) When the information processing device 3 receives the transmission data of the communication line 7 via the communication control device 4, the information processing device 3 checks the type of the communication data.
(Step S12) If the received data type is not cyclic data, the received data is discarded and the process returns to waiting for input of communication data in step S4.
(Step S6) If the received data type is cyclic data, the source address of the received data is extracted.
(Step S7) The reception buffer of the corresponding station in the cyclic data storage unit 22 is taken out. At this time, the received data is stored in the extracted reception buffer with information such as a time stamp and reception status added.
(Step S <b> 9) The data analysis unit 32 reads communication data stored from the storage device 2.
(Step S10) Display data is created according to a predesignated format.
(Step S11) When the creation of the display data is completed, the display device 6 requests the display controller 5 to overwrite the display data with the created data.
In the figure, steps S13 to S19 are examples in the trace mode (corresponding to a conventional communication data display device) in which data is stored in time series and the stored data is displayed after the data collection is completed.
[0007]
FIG. 4 is an example of a display screen displayed on the display device 6 when the information processing apparatus 3 in FIG. 1 is operating in the monitor mode.
In this example, received data for three stations with transmission source addresses 01H, 02H and 03H are displayed.
There are different display areas depending on the transmission source address, and the display contents are overwritten and updated by the latest received data in each display area.
In this example, since the received data is overwritten and updated in the same format, the data reception status (normal reception, abnormal reception, data not received) is displayed as the reception status.
[0008]
Therefore, the embodiment of the present invention includes a communication control device 4 that inputs communication data on the communication line 7, a communication data collection unit 33 that converts communication data received from the communication control device 4 into a predetermined data format, A storage device 2 that holds communication data output from the data collection unit 33; an information processing device 3 that performs communication data analysis on communication data held in the storage device 2 in accordance with predetermined items; An input device 1 for converting display format setting data input by an operator into a display format having a predetermined signal format in a communication data display device including a display device 6 for displaying an analysis result analyzed by the processing device 3 A display format setting unit 31 for converting the display format input from the input device 1 into a predetermined data format, and a table for registering the input display format A format storage unit 21, and a cyclic data storage unit 22 for storing only cyclic data from the received data for each transmission station according to an operation instruction from the input device 1 when the information processing device 3 operates in the monitor mode; In addition, when the information processing device 3 operates in the trace mode, the trace data storage unit 23 for saving the received data in time series and the communication data held in the storage device 2 are displayed as the display format storage unit 21. The communication data analysis unit 32 analyzes the display format registered in the table and generates display data, and the display control unit controls the display data generated from the stored data for each station by the communication data analysis unit 32 5, and the information processing device 3 switches to the monitor mode in response to an operation instruction from the input device 1. Since only the transmission data is displayed on the display device 5, the cyclic data of the communication data can be analyzed and displayed on-line according to a pre-specified display format without creating a dedicated program. it can.
[0009]
【The invention's effect】
As described above, according to the present invention, cyclic data of communication data can be analyzed and displayed online according to a display format designated in advance without creating a dedicated program.
[Brief description of the drawings]
FIG. 1 is a block diagram of a communication data display device showing an embodiment of the present invention.
2 is an example of a storage format of cyclic transmission reception data stored in the cyclic data storage unit in FIG. 1. FIG.
FIG. 3 is a flowchart for explaining the operation of the information processing apparatus in FIG. 1;
4 is an example of a display screen displayed on the display device when the information processing apparatus in FIG. 1 is operating in the monitor mode.
[Explanation of symbols]
1 Input device 2 Storage device 3 Information processing device 4 Communication control device 5 Display control unit 6 Display device 7 Communication line 21 Display format storage unit 22 Cyclic data storage unit 23 Trace data storage unit 31 Display format setting unit 32 Communication data analysis unit 33 Communication Data Collection Unit 32a Switch (for storage device switching)
33a switch (for storage device switching)
221 Reception buffer pointer table 222 Reception buffer 222a Transmission source address 222b Reception status 222c Time stamp 222d Reception data length 222e Reception data

Claims (1)

A communication control device for inputting communication data on a communication line;
A communication data collection unit that converts communication data received from the communication control device into a predetermined data format;
A storage device for holding communication data output from the communication data collection unit;
An information processing device that performs communication data analysis in accordance with predetermined items for communication data held in the storage device;
A display device for displaying an analysis result analyzed by the information processing device;
In a communication data display device comprising:
An input device that converts display format setting data input by an operator into a display format that is a predetermined signal format;
A display format setting unit for converting the display format input from the input device into a predetermined data format;
A display format storage unit for registering the input display format;
A cyclic data storage unit for storing only cyclic data from received data for each transmitting station according to an operation instruction from the input device when the information processing apparatus operates in a monitor mode;
A trace data storage unit for storing data received in time series when the information processing apparatus operates in the trace mode;
A communication data analysis unit that analyzes the communication data held in the storage device according to a display format registered in the display format storage unit, and creates display data;
A display control unit for controlling the communication data analysis unit to display the display data created from the stored data for each station, and
A communication data display device, wherein only the cyclic transmission data is displayed on the display device when the information processing device is switched to a monitor mode in response to an operation instruction from the input device.

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