Siemens 6AV6355-1AA47-7DA0 WinCC OA V3.19, driver S7. License for driver for connection of S7-3xx and S7-4xx controls via max. 512 connections and for connection of S7-12xx and S7-15xx controls, open controllers, PLC-Sim via max. 8 connections. Permits symbolic addressing, all protection levels and the browsing of TIA Portal projects and online configuration data. is already included in WinCC OA – server basic