西门子S7通信库 Snap7 是一个基于以太网与S7系列的西门子PLC通讯的开源库。 支持包括S7系列的S7-200、S7-200 Smart、S7-300、S7-400、S7-1200以及S7-1500的以太网通信。

Snap7, through three specialized components: Client and the inedited Server and Partner, allows you to definitively integrate your PC based systems into a PLC automation chain. Designed to transfer large amounts of hi-speed data in industrial facilities, it scales easily, down to small Linux Arm boards such as Raspberry PI.