摘要
PWM是一种周期固定、脉冲宽度可以调节的脉冲输出,是数字量输出。在S7-1200 PLC中,它提供两个输出通道用于高速脉冲输出,分别可以组态为PTO或PWM,本案例则充分利用了PWM功能来实现了食品生产线的喷嘴控制,取得了良好的效果。
PWM is a pulse output with fixed period and adjustable pulse. And it is a digital output. S7-1200 PLC provides two output channels for high-speed pulse output. Respectively, they can be configured as a PTO or PWM. In this case, we make full use of the PWM function to control the nozzle control of the food production line which finally achieved good results.
出处
《自动化博览》
2011年第9期42-44,共3页
Automation Panorama1
