描述
PLC发展到今天，已经形成了各种规模的系列化产品，可以用于各种规模的工业控制场合。除了逻辑处理功能以外，PLC大多具有完善的数据运算能力，可用于各种数字控制领域。多种多样的功能单元大量涌现，使PLC渗透到了位置控制、温度控制、CNC等各种工业控制中。加上PLC通信能力的增强及人机界面技术的发展，使用PLC组成各种控制系统变得非常容易。
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