WSMBS is a powerful and simple to use .Net Control that makes it easy to access data from a Modbus slave device connected to the PC's serial port. Simply drop the Control on your form and talk to your device with your VB.NET, C# or Managed C++. Supported protocol variants: Modbus RTU Modbus ASCII SUPPORTED MODBUS FUNCTIONS: 01: Read coil status 02: Read input status 03: Read holding registers 04: Read input registers 05: Force single coil 06: Preset single register 15: Force multiple coils 16: Preset multiple registers 17: Report Slave ID. 22: Mask write register 23: Read/Write registers User defined functions: Read User Defined Coils Read User Defined Registers Write User Defined Coils Write User Defined Registers