' ' THIS SOFTWARE IS PROVIDED BY PROCONX AND CONTRIBUTORS ``AS IS'' AND ANY ' EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE ' IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR ' PURPOSE ARE DISCLAIMED. The user ' is responsible for applying the code correctly. ' ' The following source file constitutes example program code and is ' intended merely to illustrate useful programming techniques. ' ' NOTICE ' ' Copyright (c) proconX Pty Ltd. ' ' tinyslave.vb ' ' A simple Modbus RTU slave program. } while (!(result != BusProtocolErrors.FTALK_SUCCESS)) If (result != BusProtocolErrors.FTALK_SUCCESS)Ĭonsole.WriteLine(BusProtocolErrors.getBusProtocolErrorText(result)) Ĭonsole.WriteLine( 'Modbus server started on serial interface ' + mbusServer.portName) MbusSerialSlaveProtocol.SER_PARITY_EVEN) Result = mbusServer.startupServer( 'COM1', Result = mbusServer.addDataTable( 1, dataTable) // Unit ID is 1 if (result = BusProtocolErrors.FTALK_SUCCESS)

Private MyDatatable dataTable = new MyDatatable() Private MbusRtuSlaveProtocol mbusServer = new MbusRtuSlaveProtocol() Copy registers from Modbus to local data block for ( int i = 0 i < regArr.Length i++) Copy registers from local data array to Modbus for ( int i = 0 i localRegisters.Length) Validate range if (startRef + regArr.Length > localRegisters.Length) Adjust Modbus reference counting from 1-based to 0-based Protected override bool readHoldingRegistersTable(Int32 startRef, Int16 regArr)Ĭonsole.WriteLine( 'readHoldingRegisters from ' + startRef + ', ' + regArr.Length + ' references')

Private short localRegisters = new short // // using System Ĭlass MyDatatable: MbusDataTableInterface IN NO EVENT SHALL PROCONX OR CONTRIBUTORS BE // LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR // CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF // SUBSTITUTE GOODS OR SERVICES LOSS OF USE, DATA, OR PROFITS OR // BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, // WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR // OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF // ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. // THIS SOFTWARE IS PROVIDED BY PROCONX AND CONTRIBUTORS ``AS IS'' AND ANY // EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR // PURPOSE ARE DISCLAIMED. The user // is responsible for applying the code correctly. // The following source file constitutes example program code and is // intended merely to illustrate useful programming techniques. // NOTICE // // Copyright (c) proconX Pty Ltd. // tinyslave.cs // // A simple Modbus RTU slave program.

Modbus rtu protocol example