The system, which consists of one body module and a number of extension modules, achieves one point-to-multipoint data transmission based on master-slavemode.
系统由一个PL C本体模块和多个PLC扩展模块组成,实现了主从模式的一点对多点的数据传输。
3
After researching the defects of RS485 in master-slavemode, control network of equivalent mode in multiple computer's communication is put forward in this paper.