JP2002185566A - Communication data indicator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a communication data indicator capable of monitoring and indicating cyclic data on line without using programs. SOLUTION: The communication data indicator having a communication controller 4, a communication data collector 33, a memory 2, an information processor 3 and a display 6 comprises an input unit 1 for converting indication format setting data inputted by an operator to a specified indication format, an indication format setting unit 31 for converting the indication format inputted from the input unit 1 to a specified data format, an indication format memory 21 for registering the inputted indication format, a cyclic data memory 22 for storing only cyclic data separately for transmitting stations among received data according to an operating instruction from the input unit when the information processor 3 operates in a monitor mode, a communication data analyzer 32 for preparing indication data, and an indication controller 5 for indicating and controlling the prepared indication data thereafter.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication data display device for analyzing and displaying communication data on a line connected to a communication line.

[0002]

2. Description of the Related Art Conventionally, in installation and maintenance of a network system, a communication data display device has been used as means for judging whether received data is normal or abnormal or for analyzing the content of communication data when an abnormality is detected. Such a communication data display device includes a step of storing communication data in a storage device in chronological order,
The display process of the accumulated data cannot be performed at the same time, and the data is displayed offline after the data collection is completed.

[0003]

Generally, a communication protocol used in a control system includes a cyclic transmission and an asynchronous event transmission, but a message used in the cyclic transmission has a fixed length. , The format is fixed. For example, SERCOS (IEC1491) performs cyclic transmission between one master station and N slave stations. A negotiation is performed between the stations, and after the initialization is completed, a fixed format message is transmitted and received. Also, this fixed format message is
It contains bit data such as switch ON / OFF instructions and contact input status. However, in order to observe such bit data, a conventional communication data analysis display device uses:
It was necessary to analyze while extracting only the corresponding bit data portion of the received data stored in time series. Also,
Since the data display is performed offline, a dedicated application program had to be developed to observe the state of the input signal online. SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to provide a communication data display device capable of displaying cyclic data online on a monitor without a program.

[0004]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a communication control apparatus for inputting communication data on a communication line, and a method for converting communication data received from the communication control apparatus into a predetermined data format. A communication data collection unit to be converted, a storage device holding communication data output from the communication data collection unit, and a communication data analysis performed on communication data held in the storage device in accordance with a predetermined predetermined item. And a display device for displaying an analysis result analyzed by the information processing device, a display format in which display format setting data input by an operator becomes a predetermined signal format. An input device, a display format setting unit that converts a display format input from the input device into a predetermined data format, A display format storage unit for registering a display format, and a cyclic unit for storing only cyclic data from received data for each transmitting station by an operation instruction from the input device when the information processing device operates in the monitor mode. A data storage unit, a trace data storage unit for storing data received when the information processing apparatus operates in the trace mode in a time-series manner, and communication data held in the storage device, the display format storage unit A communication data analysis unit that analyzes according to the display format registered in the communication data analysis unit to create display data, and a display control unit that controls the communication data analysis unit to display display data created from saved data for each station. The information processing device switches to a monitor mode in response to an operation instruction from the input device, thereby Only the click data transmitted is obtained so as to display on said display device.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram of a communication data display device 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. 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 is for registering the input display format, and includes a cyclic data storage unit 22.
When the information processing device 3 operates in the monitor mode, only the cyclic data from the received data is stored for each transmitting station in accordance with an operation instruction from the input device. This is for storing received data in chronological order when operating in the mode. The information processing device 3 includes a display format setting unit 3
1, a communication data analysis unit 32 and a communication data collection unit 33 are provided. The input device 1 converts display format setting data input by the operator into a predetermined signal format and transmits the signal format 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 the data format to the storage device 21. The storage device 21 holds a display format. Also, the input device 1
Receives the start / stop of the reception data collection from the operator and the selection input of the operation mode of the information processing apparatus, and also transmits the information to the information processing apparatus 3. The communication control device 4 performs input control for receiving transmission data on the communication line 7 and transmitting the data to the information processing device 3. The communication data collection unit 33 converts communication data received from the communication control device 4 into a predetermined data format and outputs the data to the storage device 2. 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, the communication data is input from the storage device 2 and the display format is input from the display format storage unit 21. Here, as the input source of the communication data, either the cyclic storage unit 22 or the trace data storage unit 23 is selected according to the operation mode of the information processing device 3. The communication data analysis unit 32 creates display data from the input communication data according to the input display format,
Output to the display control unit 5. At this time, when the operation mode of the information processing device 3 is the monitor mode, the communication data analysis unit 32
Indicates that the display control unit 5 overwrites the previous value of the received data with the current value of the received data. The display control unit 5 controls display of an input data signal. The display device 6
The input information is displayed according to the control of the display control unit 5.
FIG. 2 is an example of a storage format of the cyclic transmission reception data stored in the cyclic data storage unit 22 in FIG. In the present embodiment, 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 are provided. The reception buffer pointer table 221 stores the data in the monitor mode when cyclic data is received.
It is used to extract the corresponding reception buffer from the source address of the reception data. The reception buffer includes an area for storing reception data, a storage area for a transmission source address, a reception status, a time stamp, and a reception data length. The received data is always overwritten and updated with the latest received data during the monitoring operation.

Next, the operation of this embodiment will be described with reference to FIG. FIG. 3 shows the information processing apparatus 3 shown in FIG.
6 is a flowchart for explaining the operation of FIG. (Step S1) The information processing device 3 inputs a display format in advance and registers it in the display format storage unit 21. (Step S2) When the communication data analysis request is received, the analysis of the 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 is connected to the cyclic data storage unit 22 of the switching storage device 2. (Step S13) If the request is a trace request, connection is made with the trace data storage unit 23 of the storage device 2. (Step S4) Next, the information processing device 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, it 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 step S4 to wait for input of communication data. (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
Information such as a time stamp and a reception status is added and stored in the extracted reception buffer. (Step S9) The data analysis unit 32 reads the stored communication data from the storage device 2. (Step S10) Display data is created according to a format specified in advance. (Step S11) When the creation of the display data is completed, the display device 6 requests the display control unit 5 to overwrite the display data with the created data. In the figure, steps S13 to S19 are performed in a trace mode in which data is stored in chronological order and the stored data is displayed after data collection is completed (corresponding to a conventional communication data display device).
This is an example.

FIG. 4 is an example of a display screen displayed on the display device 6 while the information processing device 3 in FIG. 1 is operating in the monitor mode. In this example, the source address is 01H,
The received data for the three stations 02H and 03H are displayed. Each display area has a different display area depending on the transmission source address, and the display contents are overwritten and updated with 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 a reception status.

Therefore, the embodiment of the present invention comprises a communication control unit 4 for inputting communication data on the communication line 7 and a communication data collection unit 33 for converting communication data received from the communication control unit 4 into a predetermined data format. And the communication data collection unit 3
A storage device 2 for holding the communication data output from 3;
An information processing device 3 that performs communication data analysis on communication data held in the storage device 2 in accordance with a predetermined item, and a display device 6 that displays an analysis result analyzed by the information processing device 3 An input device 1 for converting display format setting data input by an operator into a display format of a predetermined signal format, and a display format input from the input device 1 to a predetermined data format. A display format setting unit 31 for registering the input display format, a display format storage unit 21 for registering the input display format, and an operation instruction from the input device 1 when the information processing device 3 operates in the monitor mode. A cyclic data storage unit 22 for storing only click data for each transmitting station, and a case where the information processing device 3 operates in the trace mode. Trace data storage unit 23 for storing the trace data the data received in the time series
The communication data stored in the storage device 2 is analyzed in accordance with the display format registered in the display format storage unit 21 to generate display data. A display control unit 5 for controlling display data created from the stored data to be displayed, and the information processing device 3 switching to the monitor mode in response to an operation instruction from the input device 1 to display only the cyclic transmission data. Since the communication data is displayed on the device 5, the cyclic data among the communication data can be analyzed and displayed on-line according to a display format specified in advance without creating a dedicated program.

[0009]

As described above, according to the present invention, among communication data, cyclic data can be analyzed and displayed on-line in accordance with a display format specified in advance without creating a dedicated program. .

[Brief description of the drawings]

FIG. 1 is a block diagram of a communication data display device according to an embodiment of the present invention.

FIG. 2 is an example of a storage format of cyclic transmission reception data stored in a cyclic data storage unit in FIG. 1;

FIG. 3 is a flowchart illustrating an operation of the information processing apparatus in FIG. 1;

FIG. 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]

 REFERENCE SIGNS LIST 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 Receive buffer pointer table 222 Receive buffer 222a Source address 222b Receive status 222c Time stamp 222d Receive data length 222e Receive data

Claims (1)

[Claims] A communication control unit 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; and a communication data output from the communication data collection unit. A storage device that holds the communication data, an information processing device that performs communication data analysis on the communication data stored in the storage device in accordance with a predetermined item, and an analysis result analyzed by the information processing device. And a display device for displaying a communication format. An input device for converting display format setting data input by an operator into a display format of a predetermined signal format, and a display format input from the input device. A display format setting unit for converting the information into a predetermined data format, a display format storage unit for registering the input display format, and the information When the processing device operates in the monitor mode, according to an operation instruction from the input device, a cyclic data storage unit for storing only cyclic data from the received data for each transmission station, and the information processing device operates in the trace mode. A trace data storage unit for storing received data in a time series when operating, and analyzing communication data held in the storage device according to a display format registered in the display format storage unit, and displaying the display data. And a display control unit that controls the communication data analysis unit to display the display data created from the saved data for each station, wherein the information processing device receives the input data from the input device. By switching to the monitor mode according to the operation instruction, only the cyclic transmission data is displayed on the display device. Communication data display device characterized by was Unishi.