最后设计应用于主从式控制系统的通讯程序，这个程序是基于MODBUS协议的。
At last, the communication program applied in Master-Slave control system base on MODBUS protocol is designed.
本文设计了一种用于饲料生产设备的主从式控制系统，系统由工控机和PLC组成。
This paper presents a principal and subordinate control system for feed equipments. The control system is combined with a industrial control computer and a PLC.
建立了主从式同步卷绕控制系统的数学模型，并详细介绍了控制系统硬件和控制方法的具体设计。
The mathematical model of master-slave synchronous winding control system is established here, and the design methods of the system hardware and control method are introduced in detail.
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