关于GetTagByte(Tag Tag_Name)和GetTagByteWait(Tag Tag_Name)函数的区别
看了帮助是这样描述的
GetTagByte
Function
Determines the value of a tag of data type "unsigned 8 bit".

GetTagByteWait
Function
Determines the value of a tag of data type "unsigned 8 bit". The value is read explicitly from the AS.
不明白The value is read explicitly from the AS中的AS是什么意思，请大侠帮助