JPS63193632A - Method for transmitting maintenance information in data transmission system - Google Patents

Abstract

PURPOSE:To confirm and update maintenance information in an optional office and to make maintenance work efficient by providing respective slave offices with maintenance control means. CONSTITUTION:Respective slave offices 1a, 1b connected to a signal line 2 are respectively provided with transmission processing parts 3a, 3b, maintenance data storing memories 4a, 4b and control parts 5a, 5b and connected to a terminal equipment 6. When a maintenance data request command for displaying error log data for the office 1b is inputted by operating a keyboard 6b in a device 6, the command is supplied to the control part 5a in the office 1a and a data format is converted by the processing part 3a. The data are converted into a format appropriate for the control part 5b by the processing part 3b in the office 1b and the control part 5b discriminates the request command, reads out maintenance data from the memory 4b and returns the read data to the office 1a. The maintenance data are displayed on a CRT 6a in the equipment 6.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a maintenance information transmission method in a data transmission system, and more specifically, the present invention relates to a maintenance information transmission method in a data transmission system. The present invention relates to a maintenance information transmission method suitable for a data transmission system in which a plurality of slave stations are connected to each other and a master station sequentially polls the plurality of slave stations.

<Prior art> Conventionally, as a type of data transmission system, multiple slave stations are connected to one master station via signal lines and loopback lines, and the master station controls the multiple slave stations. A version that is polled sequentially is provided. In such a system, as shown in FIG. 5, a memory (21) for storing maintenance information etc. for each lap, and a maintenance section (22) having an access function to the memory (21) are provided. It also includes a transmission processing section (24). The maintenance section (22) also includes a CRT display (23a).
), and a terminal device (23b) having a keyboard (23b)
23) to exchange data with
By receiving a maintenance request command from the terminal device (23), maintenance information etc. are read from the memory (21) and transmitted to the terminal device (23), and the CRT
It can be displayed on the display (23a). Further, the transmission processing section (24) exchanges processing data, address data, etc. with the transmission line (25). Note that the terminal device (23) is removably connected to each station.

If any abnormality occurs in the data transmission system, by connecting the terminal device (23) to any station and inputting a maintenance request command from the keyboard (23b) in this state, the CRT display (23a) ) can visually display maintenance information. Therefore, necessary maintenance information can be obtained by causing the necessary stations to perform the above-mentioned maintenance display operation, and based on this maintenance information, the abnormal state can be confirmed, the cause of the abnormal state can be investigated, etc. Can be done.

Also, when it becomes necessary to update the contents of the memory (21), the terminal device (23) is connected to the station to be updated, and in this state, the maintenance request command and the new information to be updated can be sent from the keyboard (23b). By inputting specific data, the contents of the memory (21) can be updated.

<Problems to be Solved by the Invention> In the conventional data transmission system described above, the maintenance section ( 22) limits the range that can be processed to only the range of the relevant stations, so in order to know the maintenance information of multiple stations, connect the terminal device (23) to the relevant multiple stations, Alternatively, connect the terminal device (23) to the corresponding multiple stations one after another, and connect the terminal device (23)
By inputting a maintenance request command using the keyboard (23b) of the CRT display (23a),
) to display maintenance information.
Alternatively, it is necessary to update the contents of the memory (21) by inputting a maintenance request command and new data to be updated, resulting in a problem that the maintenance work becomes complicated as a whole.

To explain in more detail, the terminal device (2
3), the necessary terminal device (23)
The number of terminal devices (
23) to different stations one after another, the terminal device (
23) and to connect it to the corresponding station, which poses a problem of poor workability. That is,
In either case, it is necessary for the operator to go to the location where the station for which maintenance information is actually required or the contents of the memory (21) should be updated is installed, and to carry out the maintenance work. There are problems in that it takes time and effort to do so, and the time required is also significantly longer.

<Object of the invention> This invention was made in view of the above problems,
It is an object of the present invention to provide a maintenance information transmission method in a data transmission system that can significantly reduce the effort and time required for maintenance work.

Means for Solving the Problems> In order to achieve the above object, the maintenance information transmission method of the present invention is such that each slave station has a maintenance management means, and at least sends commands to the maintenance management means through a transmission control unit. By supplying this information, maintenance information can be confirmed and updated at any station by any station that constitutes the data transmission system.

However, the maintenance management means may be any device having a memory for storing maintenance data and a control means for controlling writing and reading of maintenance data.

Further, it is preferable that a terminal device having at least a CRT display and a keyboard is connected to one of the stations.

With the above maintenance information transmission method, multiple slave stations are connected to one master station via signal lines and loopback lines, and the master station sequentially transmits the multiple slave stations. In a data transmission system configured to be polled,
Since each slave station has a maintenance management means, it is possible to manage various data including transmission data at the time when an abnormality occurs and transmission data that is the cause of the abnormality.

If any abnormality occurs in the data transmission system, command data for maintenance display is supplied from the station near the operator to the transmission control unit and any station through the signal line. Since the command data is supplied to the maintenance management means through the transmission control section, the maintenance management means sends maintenance information through the transmission control section based on the command data.This maintenance information is transmitted to the command through the signal line. Supplied to the data sending station.

In addition, when it becomes necessary to update data in the maintenance management means, command data for maintenance display, and All you have to do is supply new data to be updated, and the command data and new data are supplied to the maintenance management means through the transmission control unit, so the data in the maintenance management means can be updated based on the command data and new data. can do.

Therefore, any station can check and update the maintenance information of any other station, check the maintenance information of each station without moving the operator, check abnormal conditions, and update the maintenance information of any other station. It is possible to investigate the cause of the occurrence of the condition, or update the maintenance information of each station.

When the maintenance management means includes a memory for storing maintenance data and a control means for controlling writing and reading of maintenance data, the memory for storing maintenance data is controlled by the control means based on the command data. The maintenance data can be read from and supplied to the command data sending station.

Furthermore, if a terminal device having at least a CRT display and a keyboard is connected to any station, any station can be easily specified by keyboard operation, and the CRT display can be used to easily specify any station. Maintenance information can be visually displayed.

<Example> =9- Hereinafter, embodiments will be described in detail with reference to the accompanying drawings showing examples.

FIG. 1 is a diagram schematically explaining the maintenance information transmission method of the present invention, and shows the stations (
la) <lb) are respectively transmitted by the transmission processing unit (3a) (
3b), maintenance data storage memory (4a) (4
b), and control sections (5a) (5b).

A terminal device (2) having a CRT display (6a) and a keyboard (6b) is connected to the station (1a).

Each of the transmission processing units (3a) and (3b) sends and receives data to and from the control units (5a and 5b), respectively, and also sends and receives data to and from the signal line ■. be. In addition, the control section (5a
) (5b) controls writing and reading to and from the maintenance data storage memory (4a) and (4b), respectively, and also controls data exchange between the terminal device (6) and the terminal device (6) when the terminal device (6) is connected. It also gives and receives money.

In addition, the format of the maintenance data request command transmitted through the signal line is as shown in Figure 2: destination station address (7a), destination command code (7b), source station address (7c). ), and a header section (7d) consisting of a sender command code (7d).
) and a data area (2) of a predetermined byte length.

Therefore, if a maintenance data request command for displaying error log data for station (1b) is entered by operating the keyboard (6b) of terminal device ■, first, as shown by the solid line in the figure, station (la) will be Control unit (5a
), the transmission processing unit (3a) converts the data into data in the same format as in normal data transmission, and sends it out over the signal line. This converted data is then converted by the transmission processing unit (3b) of the station (1b) into a format that is compatible with the control unit (5b). The maintenance data request command is identified as the maintenance data request command, and the maintenance data is read from the maintenance data storage memory (4b).

After that, as shown by the broken line in the figure, the maintenance data is supplied to the terminal device (6) through the completely opposite route, and the CR
visibly displayed on the T display (6a).

However, it is also possible to generate data in the format shown in FIG. 2 in the terminal device 6) and send this data through the transmission processing section.

To explain in more detail, the content of the header section ■ of the maintenance data request command for displaying error log data sent from the station (1a) is the destination station address (7a).
) is the address of the station (lb), the destination command code (7b) is the maintenance data request command data for displaying error log data, and the source station address (7c) is the address of the station (la). , is command data indicating that the sender command code (7d) should be displayed on the CRT display (6a).

Therefore, in the transmission processing unit (3b) of the station (lb), the above data is supplied to the control unit (5b), and the control unit (5b) is connected to the maintenance data storage memory (
The maintenance data read from 4b) is stored in the data area ■, and the destination address (7a) and source address (7c) are exchanged, and the destination command code (7b) and source command code (7d) are exchanged. ) to generate return data (see FIG. 3) and send it to the signal line (2) through the transmission processing section (3b). In addition, regarding the generation of return data, the transmission processing unit (3
It may be carried out in step b), or it may be carried out in the control section (5b).

The return data shown in Figure 3 is received by the station (la) because the destination address is that of the station (la), and the destination command code should be displayed on the CRT display (Ba). Since the command data indicates , the error log data stored in the data area (2) can be visually displayed on the CRT display (6a).

That is, by operating the keyboard (6b) of the terminal device 0 connected to the station closest to the operator, the maintenance data of any station can be displayed on the CRT display (6a), and the maintenance data of each station can be displayed. By tabulating and analyzing the data, it is possible to confirm abnormal conditions and investigate the cause of abnormal conditions without requiring frequent movement of workers.

FIG. 4 shows the format of a maintenance request command when updating the contents of the maintenance data storage memory (4b).
The only difference is that at the time of sending from a), new data to be updated is stored in the data area ■, and data instructing data writing is stored as the destination command code (7b). .

Therefore, in the case of this embodiment, in the station (lb), the contents of the maintenance data storage memory (4b) can be updated based on the data stored in the data area (2).

If necessary, the address data in the header section (7) is replaced, and the response data indicating whether the update was performed normally is stored in the data area ■ and sent to the station as return data. (1a).

<Effects of the Invention> As described above, the present invention allows commands to be sent from any station constituting the data transmission system to the maintenance management means of any other station.
The error log data of all stations can be checked and updated in one place, and the maintenance work can be simplified as a whole, and the required time can be significantly shortened.

[Brief explanation of the drawing]

Fig. 1 is a diagram schematically explaining the maintenance information transmission method of the present invention, Fig. 2 is a diagram showing the format of a maintenance data request command for reading error log information, and Fig. 3 is a diagram showing the maintenance data of Fig. 2. FIG. 4 is a diagram showing the format of return data corresponding to a request command; FIG. 4 is a diagram showing the format of a maintenance data request command for updating data; FIG. 5 is a diagram explaining a conventional example.

Claims (1)

[Claims] 1. Signal lines and loops for one master station. Multiple slave stations are connected via the loopback line. The master station sequentially connects multiple slave stations. Data transmission enabled to be polled In the system, each slave station performs maintenance control measures and at least maintainers. control the transmission of commands to the management means. data by supplying it through the management department. to any station that makes up the data transmission system. Maintenance information at any station It is characterized by checking and updating the Maintenance in data transmission systems information transmission method. 2. Maintenance management means are maintenance memory for storing data and maintenance Controls that control data writing and reading The above patent claim has the means The data transmission system described in item 1 of the scope of maintenance information transmission method. 3. For any station, at least CRT display and keyboard The above is connected to a terminal device with Data transmission according to claim 1 Maintenance information transmission in the system Method.