1756-PA72
1756-PA72

PLC可接收计数脉冲，频率可高达几k到几十k赫兹。可用多种方式接收这脉冲，还可多路接收。有的PLC还有脉冲输出功能，脉冲频率也可达几十k。有了这两种功能，加上PLC有数据处理及运算能力，若再配备相应的传感器（如旋转编码器）或脉冲伺服装置（如环形分配器、功放、步进电机），则*可以依NC的原理实现种种控制。

高、中档的PLC，还开发有NC单元，或运动单元，可实现点位控制。运动单元还可实现曲线插补，可控制曲线运动。所以，若PLC配置了这种单元，则*可以用NC的办法，进行数字量的控制。

新开发的运动单元，甚至还发行了NC技术的编程语言，为更好地用PLC进行数字控制提供了方便。

3.4用于数据采集

随着PLC技术的发展，其数据存储区越来越大。如德维森公司的PLC，其数据存储区（DM区）可达到9999个字。这样庞大的数据存储区，可以存储大量数据。

◆ 企业名称：厦门泰尼电气有限公司

◆ 企业性质： 有限责任公司

◆ 主营业务：DCS,PLC

◆ 经营模式： 贸易

◆ 贸易地区： 全国

◆ ： 小廖女士）

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◆ 邮政编码： 361026

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