描述
最简单的电机控制回路需要2个点DI输入,1个点DO输出。每个回路运行状态(来自于接触器辅助触点)计算DI输入1个点,启动/停止控制信号(接接触器线圈)计算DO输出1个点,故障信号(来自热继电器或者电机保护器过载信号)计算DI输入1个点。
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