Sharp7.Rx Sharp7.Rx System.Reactive.Linq System.Reactive.Threading.Tasks System.Threading.Tasks var ip = "10.30.3.221"; // Set IP address of S7 var db = 3; // Set to an existing DB // For rack number and cpu mpi address see // https://github.com/fbarresi/Sharp7/wiki/Connection#rack-and-slot var rackNumber = 0; var cpuMpiAddress = 0; using var plc = new Sharp7Plc(ip, rackNumber, cpuMpiAddress); plc.ConnectionState.Dump(); await plc.InitializeConnection(); // create an IObservable plc.CreateNotification($"DB{db}.Int6", Sharp7.Rx.Enums.TransmissionMode.OnChange).Dump("Int 6"); plc.CreateNotification($"DB{db}.Real10", Sharp7.Rx.Enums.TransmissionMode.OnChange).Dump("Real 10"); for (int i = 0; i < 15; i++) { switch (i%3) { case 0: await plc.SetValue($"DB{db}.Int6", (short)i); break; case 1: await plc.SetValue($"DB{db}.Real10", i * 0.123f); break; } await Task.Delay(300); }