CAJ | 학술논문

采用 Modbus 通信协议，以西门子 S7200 PLC 和上位机组态王为主站，设计开发了基于STM32F103C8T6单片机的从站。介绍了两者之间的 RS485／RS232方式的通信协议的建立和程序的设计，详细描述了单片机与 PC 之间、单片机与 PLC之间的通讯调试，从而实现了基于 RTU 模式 Mod-bus 协议的串行通信。该系统应用于中央空调控制系统中，其控制策略和主要控制算法由 STM32从站计算，能取得较好的控制效果。
채용 Modbus 통신협의，이서문자 S7200 PLC 화상위궤조태왕위주참，설계개발료기우STM32F103C8T6단편궤적종참。개소료량자지간적 RS485／RS232방식적통신협의적건립화정서적설계，상세묘술료단편궤여 PC 지간、단편궤여 PLC지간적통신조시，종이실현료기우 RTU 모식 Mod-bus 협의적천행통신。해계통응용우중앙공조공제계통중，기공제책략화주요공제산법유 STM32종참계산，능취득교호적공제효과。
With the Siemens S7 200 PLC and upper computer KingView being the master, a slave station of STM32F103C8T6 microcontroller is developed based on Modbus protocol.The es-tablishment and program designing of communica-tion protocol using RS485/RS232 between master and slave is introduced firstly.Then the process of debugging between the microcontroller and PC, the microcontroller and the PLC is elaborated. Thus serial communication is implemented based on Modbus protocol in RTU mode.The system will be applied in central air conditioning control system.A good control effect will be obtained as the controlling strategy and main algorithm can be computed in the STM32 slave station.