本文以VB在西门子PLCS7-300与上位机通信中的应用为例，提出了VB在串行通信中一种新的应用方法。
This paper takes the communication between SIMATIC S7-300 and the computer as an example, puts forward the new idea of the usage of Visual Basic in serial communication.
在冲击大电流自动化系统中，串行通信的可靠性变得尤为重要。
In high impulse current automatic system, the reliability of serial communication become very important.
采用对等模式和标准通信模式，在原有的串行程序基础上进行了并行程序的设计。
Parallel programming was designed on the basis of serial programming by using peer-to-peer mode and standard communication mode.
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