基于欧姆龙PLC的挤出机控制系统RS-485通讯的实现  

Realization of RS-485 communication based on omron extruder control system

作　　者：薛凯 王丹 Xue Kai;Wang Dan(Tianhua Institute of Chemical Machinery & Automation Co. LTD., Lanzhou 730060, Gansu, China)

机构地区：[1]天华化工机械及自动化研究设计院有限公司,甘肃兰州730060

出　　处：《橡塑技术与装备》2019年第5期42-46,共5页China Rubber/Plastics Technology and Equipment

摘　　要：详细介绍了双螺杆挤出机控制系统中一种全新的通讯控制方法,控制系统包括了37块欧姆龙E5EC温控表和5台西门子G120变频器,通过使用欧姆龙PLC的RS-485通讯模块结合MODBUS-RTU通讯协议以及欧姆龙协议宏,实现了与众多外围设备间的通讯。在外围设备较多的情况下,通讯刷新速度小于2 s。通过这种方法,实现了挤出机控制系统快速,便捷的通讯,大大节省了安装成本和维护成本。This paper introduces a new communication control method in the control system of twinscrew extruder. The control system includes 37 Omron E5EC temperature control meters and 5 Siemens G120 inverters. By using OMRON PLC's RS-485 communication module combined with MODBUS-RTU communication protocol and Omron protocol macro, communication with many peripheral devices is realized. In the case of a large number of peripheral devices, the communication refresh rate is less than 2 s. Through this method, the extruder control system achieves fast and convenient communication, which greatly saves installation cost and maintenance cost.

关 键 词：挤出机 RS-485 MODBUS 协议宏 

分 类 号：TQ330.493[化学工程—橡胶工业]