IC693PRG300RR 模拟输入的配线的要求
1、使用屏蔽双绞线，但不连接屏蔽层。
2、当一个输入不使用的时候，将V IN 和COM端子短接。
3、模拟信号线与电源线隔离 (AC 电源线，高压线等)。
4、当电源线上有干扰时，在输入部分和电源单元之间安装一个虑波器。
5、确认正确的接线后，首先给CPU单元上电，然后再给负载上电。
6、断电时先切断负载的电源，然后再切断CPU的电源。
PLC编程算法(3)——脉冲量的计算
脉冲量的控制多用于步进电机、伺服电机的角度控制、距离控制、位置控制等。以下是以步进电机为例来说明各控制方式。
1、 步进电机的角度控制。首先要明确步进电机的细分数，然后确定步进电机转一圈所需要的总脉冲数。
计算“角度百分比=设定角度/360°(即一圈)”
“角度动作脉冲数=一圈总脉冲数*角度百分比”
公式为：
角度动作脉冲数=一圈总脉冲数*(设定角度/360°)
IC693PRG300RR
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IC693PRG300RR
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