描述
用PLC进行模拟量控制的好处是，在进行模拟量控制的同时，开关量也可控制。这个优点是别的控制器所不具备的，或控制的实现不如PLC方便。当然，若纯为模拟量的系统，用PLC可能在性能价格比上不如用调节器。这也是应当看到的
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