JPH01201763A - Data transfer system - Google Patents

Abstract

PURPOSE:To receive a large capacity of data at intervals of a prescribed time by providing a buffer memory in a slave station and collectively transferring data from a main station to the slave station. CONSTITUTION:A main station information processing part 2 writes communication data stored in a memory 1 into a large capacity buffer 10 through a data bus at the intervals of the prescribed time, and informs the slave station of the transfer completion of data. A slave station information processing part 3 receives the signal and sequentially reads data from the large capacity buffer memory 10 one by one. Said part 3 processes data and stores processed data in a memory 9. Since the main station information processing part 2 is occupied only at the time of writing into the large capacity buffer 10, queuing does not occur in the processing of the main station.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a data transfer method, and in particular to a data transfer method that is performed at fixed time intervals between two stations [Prior Art] [Conventionally, data transfer from a master station to a slave station When rearranging the data after processing the data and creating other data, the master station information processing section 2 uses the status line 7 between the slave stations to transmit the data to the slave stations, as shown in Figure 2. We will notify you of availability. When a response indicating that reception is possible is obtained from the slave station, memory 1 is
1 to the slave station via the information processing section 2.
Send byte by byte. In this case, the information processing sections 2 and 3 of the master station and the slave station mutually check the status of the other information processing sections using the status line 7 before transmitting data.

The slave station temporarily stores the data received from the master station in the reception memory 4 via the information processing section 3. When all data transmission from the master station is completed, the slave station information processing section 3
reads the data stored in the memory 4 one by one, processes the data, and stores it again in the storage memory 8 in the order of data number.

[Problem to be solved by the invention]

In the conventional data transfer method, as described above, the information processing units of both the master and slave stations use the status line to mutually check the status of the other information processing units while transmitting and receiving one byte at a time. , since the data is processed and the data is sorted in order of data number and written to the result storage memory again, a large amount of processing time is required from data transfer to data processing and storage. In the data transfer, the time occupied by the information processing section of the slave station is large, resulting in a situation where it becomes impossible to receive a plurality of large-capacity data sent from the master station at secondary fixed time intervals.

The present invention provides a data transfer method that solves these problems of the conventional method.

[Means to solve the problem]

According to the present invention, in a data transfer method performed at constant time intervals between a master station and a slave station.

The master station includes a storage unit that stores data to be sent to the slave station;
The slave station has an information processing unit that performs control for transmitting the data accumulated in the storage unit to the slave station at regular time intervals, and a communication means using a status line indicating the start of communication. A buffer memory for receiving all data sent from the master station after the slave station confirms the reception status through a communication means using a status line indicating the start of communication, and a buffer memory for receiving all data sent from the master station, A data transfer system is obtained that includes a slave information processing section that sequentially reads and processes data in the order in which they are written, and a slave storage section that stores data processed by the slave information processing section.

〔Example〕

Next, nine aspects of the present invention will be described with reference to the drawings.

FIG. 1 shows a configuration diagram of an embodiment of a data transfer system according to the present invention. In this figure, 1 is the memory of the master station, 2 is the information processing section of the master station, 3 is the information processing WW of the slave station, and 9 is the memo of the slave station! j, 10 is a large capacity buffer memory, 5 is a data bus, and 6 is an address bus.

7 is a communication status line, and 11 is a read/write line for the buffer memory 10.

The master station information processing section 2 notifies the slave station information processing section 3 of the presence of transfer data via the communication status line 7 at regular intervals. When the information processing unit 2 confirms via the communication status line 7 that the slave station has detected this and is ready to receive data, the master station processes all of the transmitted data stored in the memory 1 via the data bus 5. The data is written to the large-capacity buffer memory 10 of the slave station via the section 2.

When the master station completes the data transfer, it notifies the slave station that the data transfer is complete. When the slave station information processing section 3 detects the end of data transfer from the master station, it sequentially reads data one by one from the large capacity buffer memory 10 and processes it.
The processed data is stored in the memory 9 in order of data number.

In this way, after writing the transmission data to the large-capacity buffer memory 10, the data is read,
By writing processed data into the memory 9 in the order of data numbers, the processing time from data transfer to data processing and storage can be shortened.

〔Effect of the invention〕

As is clear from the above description, the present invention uses a buffer memory in a slave station in a data transfer system in which data is transferred between two stations at fixed time intervals.

By transferring data all at once from the master station to the slave station,
This has the effect of shortening the processing time from data transfer to data processing and storage, and avoiding a situation where the slave station is unable to receive large amounts of data transmitted from the master station at regular intervals.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of a data transfer method according to the present invention, and FIG. 2 is a block diagram showing an example of a conventional data transfer method. 1.9...Memo! J * 2 e 3...-information processing unit, 4... memory for reception, 5... data bus, 6...
...address bus. 7...Status line, 8...Storage memory, 10.
...Large capacity pack memory, 11...Read/write line.

Claims (1)

[Claims] 1. In a data transfer method that is performed at fixed time intervals between a master station and a slave station, the master station has a storage section that stores data to be sent to the slave station, and the data accumulated in the storage section is summarized at fixed time intervals. and a communication means using a status line indicating the start of communication. a buffer memory that receives all data sent from the master station after the slave station confirms a receivable state; and slave station information processing that sequentially reads and processes the data written in the buffer memory in the order in which it was written. 1. A data transfer system comprising: a slave station storage section; and a slave storage section that stores data processed by the slave station information processing section.