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40. 在西门子 S7-200 指令中，下列指令哪项是字节取反指令 （ ）
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40. 在西门子 S7-200 指令中，下列指令哪项是字节取反指令 （ ）
A、ANDB
B、ORB
C、XORB
D、INVB
时间：2021-09-01 19:12
关键词：
青书学堂
河北建筑工程学院
现代控制技术及PLC（高起专）
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D
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在西门子S7-200PLC中 不可以连接扩展模块。
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