ABB SLMG99具备多轨高速输出装置
所有从FBD左边输入右边输出的信号,叫做变量。每个变量必须有一个名字。
■存在两种类型的变量,每-种类型使用--种标准功能:
一读变量-输入信号;所有变量都定义在变量列表中
一写变量-输出信号;所有变量都定义在变量列表中(只有一个变量列表存放读和写变量)
■依标识名长度不同,可以选择<short>和<long>两种类型。也就是说标识分为短注释和长文本两种。
新变量必须选择数据类型。
注意:变量的数据类型与函数的数据类型必须一致!
■<过程映像>:
■变量在过程映像中被程序执行(所有映象变量前要有@标记)
变量直接在I/O模件中执行
■<输出>:
01变量被其他资源读时释放
变量仅在自己资源读时释放
注意:不要配置所有变量导出,这样会使总线负载加重!
■<注释>:有利于变量列表的使用
信号线组态:
一按下<Ctrl>键,并按住不动.
一使鼠标光标指向变量或者功能块的一一个管脚
一按下鼠标左键,并按住不动

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