Emphasis is laid on the design of the slave control box.
文中主要介绍新方案中分控制盒的设计。
At last, the communication program applied in Master-Slave control system base on MODBUS protocol is designed.
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。
It is controlled by the master slave control system based on PLC, with high reliability and convenient operation.
该生产线采用基于PLC的主从控制系统来控制，可靠性高、操作方便。
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