外文翻译
题目ProgrammableLogicCo
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54PLCSTATUS65MEMORYTYPES76SOFTWAREBASEDPLCS87SUMMARY88PRACTICEPROBLEMS89PRACTICEPROBLEMSOLUTIONS9中文翻译111PLC介绍112．指令123．运行顺序1331输入输出扫描143．2逻辑扫描144．PLC状态显示155．存储器类型166．基于软件的PLC系统167．概要178．实际问题179．实际问题解答17
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