macro_command main()
int a
GetData(a ,"本機(jī) 觸摸屏", LW_Binplc ,1000,1)
a=a*40
SetData(a ,"本機(jī) 觸摸屏", LW_Binplc ,9000,1)    
end macro_command

這段宏指令a=a*40是什么意思？
RWI_0應(yīng)該是一個(gè)數(shù)值，怎么能存儲(chǔ)多組數(shù)值？
小弟新手，有些問題可能有些幼稚

macro_command main() 的                                   程序開始
int a                                                                       變量a
GetData(a ,"本機(jī) 觸摸屏", LW_Binplc ,1000,1)    LW 1000的數(shù)據(jù)讀到，變量a
a=a*40                                                                  a*40   相當(dāng)于存儲(chǔ)器LW1000的數(shù)據(jù)乘以40
SetData(a ,"本機(jī) 觸摸屏", LW_Binplc ,9000,1)    LW 1000數(shù)據(jù)乘以40的結(jié)果，傳送到LW 9000
end macro_command                                          程序結(jié)束
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