JPS6189750A - Data communication system - Google Patents

Abstract

PURPOSE:To shorten the communication time by communicating data between a master station and slave stations with general IDs which designate plural object slave stations. CONSTITUTION:An ID setting and storage means consists of memory elements or dip switches, and general IDs with which the master station designates object slave stations and individual IDs are stored there. Since both of general IDs a1-an using a parameter X and individual IDs b1-bn using individual parameters are stored in slave stations A1-An, data can be transmitted to all slave stations A1-An at a time by the parameter X of general IDs a1-an if the same data is transmitted from a master station 7 to slave stations A1-An. In comparison with a conventional system, the time of one communica tion in this system is t-number of seconds and is 1/n of nxt-number of seconds in the conventional system. Thus, general IDs are provided besides individual IDs in plural slave stations to transmit data from the master station to all slave stations to transmit data from the master station to all slave stations in one data transmission in case of the same data.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a data communication system between a master station and a plurality of slave stations.

[Conventional technology]

Conventionally, data communication between a master station and a plurality of slave stations is performed by the master station transmitting data to each slave station using individual III).

FIG. 3 shows a configuration diagram for explaining a conventional data communication system. In Fig. 3, slave stations B1 to Bn have individual IDb
1 to bnl are not stored, so when the master station 7 sends the same data, it changes the individual ID for each slave station B1 to Bn.
data must be sent once. Therefore, assuming that communication takes t seconds for each station, a time of nXt seconds is required.

[Problem that the invention seeks to solve]

In this method, the same data is
When transmitting to a station, it is necessary to change the TI'' of the transmitted data for each unique slave station, and there is a difference in the time from when the first slave station receives the data to when the last slave station receives the data. In other words, the disadvantage is that as the number of slave stations increases, the difference becomes larger and a large amount of time is consumed for communication.

The present invention has been made in view of these points, and an object of the present invention is to provide a data communication system that reduces communication time.

[Means for solving problems]

In order to achieve such an object, the present invention is configured to perform data communication between a master station and a slave station using a simultaneous ID for specifying a plurality of target slave stations.

[Effect]

In the present invention, the master station efficiently communicates data with the slave stations using a simultaneous ID.

〔Example〕

The present invention will be explained using examples. FIG. 1 is a block system diagram showing one embodiment of the data communication system according to the present invention, in which 1 is composed of a memory element or a deep inch, and stores a collective ID and an individual ID for the master station to specify target slave stations. ID setting storage means, 2 is a communication data input means for externally inputting data to be transmitted from the master station to the slave station, 3 is a communication data input means for inputting data inputted by the communication data input means 2 to determine whether parameters are to be set as simultaneous IDs or individually. 4 is a transmission data creation means for creating data to be transmitted to the slave station based on the judgment of the input data determination means 3; 5 is a transmission data creation means for transmitting the data created by the transmission data creation means 4; Communication means, 6 is simultaneous ID
Alternatively, if it matches the individual ID, it is a slave station data receiving means that accepts the data and stores the accepted data.

The operation of this system will be explained using FIG. In Fig. 2, slave stations A1 to An all use parameter X, IDa
l~an and individual IDbl~bn using individual parameters are stored, so from the master station 7 to each slave station A1~An
If the data sent to the same data is the same, all IDa
All slave stations A1 to An at one time due to parameter X of l to an
data can be sent to. In comparison with the conventional method, the communication time in this method is t seconds for one time,
This is l/n of nXt seconds in the conventional method.

〔Effect of the invention〕

As explained above, according to the present invention i, by providing simultaneous IDs in addition to individual rDs in a plurality of slave stations, in the case of the same data, data can be transmitted once from the master station side.7. )
To the subordinate. Send. It's possible, huh? 7. It has the effect of shortening arc communication time.

[Brief explanation of drawings]

Fig. 1 is a block system diagram showing an embodiment of the data communication system according to the present invention, Fig. 2 is a block diagram for explaining it, and Fig. 3 is a block diagram for explaining the conventional data communication scheme. It is. 1...ID setting storage means, 2...data input means, 3...input data judgment means, 4...transmission data creation means, 5...communication hand/slave station data reception Means, 7... Main station, A'l~An, Bl-Bn...l~an...
・・All ID, “bl~bn・・Person individual ID 0

Claims (1)

[Claims] Collective ID and individual ID for the master station to specify target slave stations
ID setting storage means for storing D; data input means for externally inputting data to be transmitted from the master station to the slave station; input data determining means for determining whether to use the individual ID; transmission data creation means for creating data to be transmitted to the slave station based on the determination of the input data determining means; and data created by the transmission data creation means. If the communication means to be sent matches the collective ID or the individual ID, the data is accepted;
A data communication system comprising slave station data receiving means for storing the received data.