3BSE032402R1（ABB）3BSE032402R1

3BSE032402R1
3BSE032402R1
3BSE032402R1



局部变量
   S7中的局部变量又称为“临时变量（Temporary）”，它用于存储逻辑块内部中间状态暂存的寄存器（堆栈L），堆栈的状态仅在所在的逻辑块内部生效，不可以用于其他逻辑块。
   (3)静态变量
   静态变量( Static)只能用于功能块FB，它存储在与功能块配套的即时数据块DI中，仅对所调用的FB块有效，结果可以记忆，但只能与FB配套使用，不能用于其他逻辑块。

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