模块1746-IB32
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面议
程序的行为和用途类似于功能块,程序具有输入和输出参数,而且可以具有内部存储区。程序通常包含有对功能和功能块的调用。
IEC61131-3定义了若干标准的功能和功能块。
5.S7-300/400与IEC61131-3程序结构的区别
1)S7-300/400的功能可以有多个输出参数,返回值也属于输出参数。IEC61131-3的功能只有一个返回值。
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RELIANCE DCS 57411-2E/57C411
RELIANCE DCS 57435-J/57C435
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