【摘要】 CCM通信协议是KOYO兼容SM系列PLC所支持的一种主从式通讯协议 ,为其开发专用的ActiveX通信控件 ,简化了上位机软件的设计 ,更可以以此为基础 ,设计PLC监控界面。对其它种类PLC及其它通讯协议也有借鉴作用。更多还原

【Abstract】 CCM communications protocol is one of the principal_subordinate protocols supported by KOEYO_compatible PLC. Designing the specific communications controls with Active X support can make the softward of principal control computer. Based on these controls, the interface for monitoring and controlling can be designed and they also have some benefit for other PLC and communications protocols.更多还原