JPH0720158B2 - Data transmission method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to data transmission between a small computer installed at a manufacturing site such as a steel plant, an electric power production system, an FA system or a CRT monitoring device and a controller. Regarding the method.

[Conventional technology]

For register data transmission between a small computer or CRT monitor and the controller, specify directly the controller station number, CPU number, head register number, register number, register data buffer address, etc. in each transmission command in the transmission program. It was a method to do by doing.

[Problems to be Solved by the Invention] However, such a conventional technique has the following problems.

When the station number or register number of the controller is changed, look for the program that describes the transmission command and set the transmission parameter of each command to 1
It had to be changed one by one, which was a problem in program maintenance.

Even if the same register data is duplicated and transmitted by the same program, it cannot be found automatically,
As a result, the transmission process may be very inefficient.

If the transmission commands are described separately, the transmission processing in the system cannot be managed collectively.

Therefore, an object of the present invention is to make it possible to collectively manage the definition of each transmission parameter to improve maintainability and transmission efficiency.

[Means for Solving the Problems]

To achieve this object, the data transmission method of the present invention is
In the transmission method of register data between a small computer or CRT monitoring device and the controller, the two-dimensional transmission data table that stores the transmission and reception data and the parameters required for transmission corresponding to each booth of the transmission data table A register definition table for defining a transmission group table, a transmission group table generated by means for obtaining a transmission group for batch group transmission with high transmission efficiency according to the register definition table, and a transmission buffer for temporarily holding the received data. By executing a transmission command corresponding to one transmission data table, the transmission side register data is collectively transmitted to the reception side transmission buffer for each group classified in the transmission group table, and this transmission is performed. Continue to the number of groups in the transmission group table and define in the transmission data table from the register data received in the transmission buffer. And updates the transmission data table using data only.

[Action]

In the present invention, transmission parameters such as a controller station number and a register number are defined in a two-dimensional table called a "register definition table" for collective management.

The definition table of the transmission register is a table different from this table. The "register definition table" in which the transmission parameters corresponding to each booth of the two-dimensional "transmission data table" that stores the transmission and reception data are defined. And a "transmission group table" that is automatically generated for efficient batch group transmission according to the register definition table, and a "transmission buffer" that temporarily buffers register data transmitted according to the transmission group table Composed of and.

On the other hand, in the transmission program, a transmission command having a function of executing transmission by referring to these tables is described. In this transmission command, the table name of the transmission data table is specified. The table name of the register definition table is set in the transmission data table.

That is, first, when the transmission parameters are set in the register definition booth of the register definition table, the transmission group table is automatically generated. In the case of register data reception, when a transmission command in the transmission program is executed after that, the reception process for each group is actually executed multiple times according to the transmission group table in the transmission register definition table, and the data is transmitted via the transmission buffer. The reception register data is stored in the data table.

By the above means, the contents of the transmission processing in the system can be understood only by looking at the register definition table, and the automatic transmission grouping processing by the system program can realize the efficient transmission processing independent of the method of creating the user transmission program. Further, even if the register number of the controller is changed, it can be dealt with only by rewriting the definition values in the transmission definition table, and since the change of the transmission program is unnecessary, maintainability is improved. Further, since a plurality of register definition tables can be created in the system, clear division of transmission processing is possible.

〔Example〕

Specific examples of the present invention will be described below with reference to FIGS. 1 to 6.

FIG. 1 is an example of a register definition table, and FIG. 2 is an example of a transmission data table. In this case, since the register definition table 1 and the transmission data table 5 are tables of 3 rows and 3 columns, the register definition booth 4 is 9
There are a total of nine transmission registers in this example. Row number 2 and column number 3 are headings for rows and columns, respectively. It is the register data booth 6 that the reception is actually executed and the register data from the controller is stored, and each of these booths corresponds to the register definition booth of the transmission register table. For example, 1 row 1 column data (1000) of the transmission data table is 1 row 1 column of the register definition table.
Corresponds to the column register definition (01-01-1-00100-AG).

FIG. 3 shows the structure of the register definition booth. The register definition booth 7 is composed of transmission parameters such as a transmission group number 8, a station number 9, a CPU number 10, a register number 11, a transmission / reception designation 12 and a group transmission designation 13. The transmission group number 8 is a number indicating a unit of transmission, and registers having the same group number are collectively transmitted. Station number 9 and CPU number 10 are numbers that specify the station and CPU of the controller to be transmitted. The register number 11 is a number that specifies the address of the register area in the controller to be transmitted. In the transmission / reception designation 12, the booth is designated to be capable of transmitting only, receiving only, or capable of both transmitting and receiving. The group transmission designation 13 designates whether or not the booth group can be transmitted.

FIG. 4 shows the internal structure of the transmission register definition table. The transmission register definition table 14 is a register definition table 15,
It is composed of a transmission group table 16 and a transmission buffer 17.

FIG. 5 shows a representation of the transmission command for reception.
The transmission command for reception 18 has three input terminals and one output terminal. Here, the input terminal is an input parameter given to the instruction, and the output terminal is an execution result output by the instruction. The three input terminals are a transmission port number terminal 20, a transmission data table name terminal 21 and an overtime time terminal 22. One output terminal is the transmission error signal terminal 23. The string of instruction symbols 19 at the top of the expression (TRCV)
Is a command symbol of this transmission command.

The above FIGS. 1 to 5 will be collectively described.

First, as shown in FIG. 1, when transmission parameters are set in each register definition booth 4 of the register definition table 1 in accordance with the configuration of FIG. 3, the register definition table 15 shown in FIG. 4 is generated. Next, by carrying out a storage operation of the transmission register definition table, the information for each booth is automatically grouped together, and the transmission group table 16 shown in FIG. 4 is generated. This completes the preparation of the transmission register definition table. After that, when a transmission command 18 as shown in FIG. 5 in the user program is activated, transmission processing with the controller is executed according to the transmission group table 16 in the transmission register definition table shown in FIG. Data transfer is performed between each register data booth 6 of the transmission data table 5 shown in FIG. 5, the transmission buffer 17 shown in FIG. In FIG. 5, the table name of the transmission data table 5 shown in FIG. 2 is input to the transmission data table name terminal 21.

FIG. 6 is a flow chart showing the procedure for automatically generating the transmission group table 16 of FIG. In the figure, process 100
Is the initial setting of the work data used for automatic generation, and sets the row number, maximum column number and in-process row number of the register definition table to be automatically generated, and the initial value (0) of the column number.

The processes 110 to 140 are repeated while stepping the row number and the column number until the processes for all the booths are completed.

The processes 150 to 170 read the definition data of one booth, and determine the presence or absence of the data of the group in the transmission group table based on the group number and the register number. If there is no data for the group, steps 172 to 174 are executed as a new creation process. If there is data in the group, steps 180 to 220 are executed as additional processing. By executing these processes 172 to 176 or processes 180 to 220, the MAX register number and the MIN register number for each group can be obtained.

Processes 300 and 310 are initial settings of work data used in the process to generate the first register number in the transmission group table and the number of registers transmission buffer pointer, and the maximum number of in-process group number (0) and group number. To set.

Steps 320 to 350 are repeated until the processing for all groups is completed while stepping through the group numbers, and based on the MAX register number and MIN register number for each group obtained by the preprocessing, the top register number and register Create a number, transmission buffer pointer.

〔The invention's effect〕

As described above, according to the present invention, most of the work necessary for the transmission process is completed by simply setting the transmission parameters of the registers that need to be transmitted according to the register map of the controller in the register definition table. After that, it suffices to describe in the program the transmission command designating the table name of the transmission register table. For this reason,
This has the effects of significantly improving program maintenance, improving the efficiency of transmission processing, and enabling collective management of transmission processing.

[Brief description of drawings]

FIG. 1 is a diagram showing an example of a register definition table, FIG. 2 is a diagram showing a transmission data table showing a relation with the register definition table of FIG. 1, and FIG. 3 is a configuration of register definition booths of the transmission register definition table. FIG. 4, FIG. 4 is a diagram showing the structure of a transmission register definition table, FIG. 5 is a diagram expressing a reception transmission command, and FIG. 6 is a flowchart showing a procedure for automatically generating a transmission group table. 1: Register definition table, 2: Row number 3: Column number, 4: Register definition booth 5: Transmission data table, 6: Register data booth 7: Register definition booth, 8: Transmission group number 9: Station number, 10: CPU Number 11: Register number, 12: Transmission / reception specification 13: Group transmission specification, 14: Transmission register definition table 15: Register definition table, 16: Transmission group table 17: Transmission buffer

Claims (1)

[Claims] 1. A transmission method of register data between a small computer or a CRT monitoring device and a controller, wherein a two-dimensional transmission data table storing transmission and reception data and each booth of the transmission data table are provided. A register definition table defining parameters necessary for transmission, a transmission group table generated by means for obtaining a transmission group for batch group transmission with good transmission efficiency according to the register definition table, and the reception data temporarily held By transmitting a transmission command corresponding to one transmission data table, the transmission register data is collectively transmitted to the reception side transmission buffer for each group classified in the transmission group table in the transmission side register data. However, this transmission is continuously performed for the number of groups in the transmission group table, and the transmission data is transferred from the register data received in the transmission buffer. Data transmission method and updates the transmission data table using only the data defined in the data table.