摘要
针对多电动机变频调速同步控制系统,提出了基于PLC Modbus通讯协议的控制方案。PLC通过Modbus总线实时地向变频器读取或写入数据,电机速度由总线读入PLC,再经过PID处理后调节各变频器的速度给定,实现速度闭环控制,保证多电动机同步运行。经实验证明,该控制系统结构简单、易于实现,PID速度闭环控制无需添加测速元件,且数字信号不易受到干扰。
Aiming at the multi-motor synchronous control system of variable frequency speed regulation ,the control scheme based on PLC Modbus communication protocol was put forward .The data were read or written into the converter in real time through the Modbus ,the speed closed loop control was realized ,to ensure the multi-motor synchronous operation .The experiment shows the control system has the advantages of simple structure ,easy realization and stable performance .
出处
《机械工程与自动化》
2015年第6期140-142,共3页
Mechanical Engineering & Automation
基金
徐州工业职业技术学院院级课题(XGY201416)
