Networking communication method for upper computers and lower computers

Abstract

The invention discloses a networking communication method for upper computers and lower computers. The networking communication method comprises the following steps: the upper computers send broadcast query instructions or interrupt pulse signals and start a first timer to count down; the upper computers are set into instruction data receiving states in the period of countdown; the lower computers start broadcast query instruction judgment programs or interrupt pulse signal detection programs if instruction data are required to be uploaded; the lower computers return local address codes or specific coding instructions to the upper computers if judging that the broadcast query instructions or the interrupt pulse signals exist; the upper computers judge whether the returned address codes or the specific coding instructions belong to address values or code values which are registered in the upper computers and comply with instructions rules or not in the period that the first timer times; and if the instruction data comply with the instruction rules, the upper computers query the lower computers one by one according to the address codes or the specific coding instructions and exchange data with the corresponding lower computers. The networking communication method has the advantages of: high communication efficiency, and no code conflict among the low computers.

Description

technical field [0001] The invention relates to a network communication method for a single upper computer and a plurality of lower computers, in particular to a communication method for uploading data through two buses or a single-channel frequency carrier. Background technique [0002] Existing communication methods for exchanging data between a single upper computer and multiple lower computers generally use polling by the upper computer or single or multiple uploads by the lower computers for communication. If these communication modes have a large number of lower computers connected to the network, it is easy to cause a serious delay in communication efficiency. [0003] For the communication mode after the upper computer sends the query command, if there are many connected lower computers, especially when some lower computers are disconnected, the data communication efficiency will be greatly delayed, so that the lower computer The data cannot be transmitted upwards a...

AI Technical Summary

Problems solved by technology

If these communication modes have a large number of lower computers connected to the network, it is easy to cause a serious delay in communication efficiency.

[0003] For the communication mode after the upper computer sends the query command, if there are many connected lower computers, especially when some lower computers are disconnected, the data communication efficiency will be greatly delayed, so that the lower computer The data cannot be transmitted upwards at the fastest speed, and it may take several seconds or even longer to be transmitted to the upper computer, and the response capability of the lower computer to upload data is not enough

[0004] For the communication mode in which the lower computer actively sends out signals, the upper computer has a high response ability, but when two lower computers upload data at the same time, it is easy to overwrite the code, which will cause the overall system to be paralyzed

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