研究了以欧姆龙PLC为控制核心的温（网）室灌溉系统。采用VB6．0程序设计语言，在Windows环境下实现了上位计算机与PLC的串行通信，以实现上位机对下位机的监控和数据交换，该控制器能实现灌溉的定时和适时控制。实践证明，该控制器能满足温（网）室育苗的要求-to study the OMRON PLC for the control of the core temperature (network) room irrigation system. Using Visual Basic 6.0 programming language, in the Windows environment under the Host Computer and PLC serial communication, PC to achieve the next crew of the supervisory control and data exchange, the controller can achieve irrigation regular and timely control. Practice shows that the controller can meet temperature (network) nursery room requirements