I am trying to ping a Socomec meter using the Modbus protocol, having researched, I found NModbus, a C# library. I have never used libraries or C# before (normally Java), but I have to dive right in.
I set myself up with Visual Studio Express for C# and installed .Net. I have copied then contents of the NModbus file into my project folder and added the references to the two main DLLs. Its didn't work with .Net 4, but I retargeted to 3.5 (and removed the Microsoft.Csharp reference) and things seemed to compile.
I am using this sample, below, to attempt to connect to the slave device. When I run this, and set the startAdress variable to the desired one (found in Socomec documentation) however all I get is a blank console window.
In short, am I using the correct method/parameters, is my setup/code incorrect? How do I connect to this meter?
My code:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO.Ports;
using Modbus.Data;
using Modbus.Device;
using Modbus.Utility;
namespace NModbus
{
class SerialMaster
{
static void Main(string[] args)
{
ModbusSerialAsciiMasterReadRegisters();
}
public static void ModbusSerialAsciiMasterReadRegisters()
{
using (SerialPort port = new SerialPort("COM1"))
{
// configure serial port
port.BaudRate = 9600;
port.DataBits = 8;
port.Parity = Parity.None;
port.StopBits = StopBits.One;
port.Open();
// create modbus master
IModbusSerialMaster master = ModbusSerialMaster.CreateAscii(port);
byte slaveId = 1;
ushort startAddress = 50536;
ushort numRegisters = 5;
// read five registers
ushort[] registers = master.ReadHoldingRegisters(slaveId, startAddress, numRegisters);
for (int i = 0; i < numRegisters; i++)
Console.WriteLine("Register {0}={1}", startAddress + i, registers[i]);
Console.ReadLine();
}
// output:
// Register 1=0
// Register 2=0
// Register 3=0
// Register 4=0
// Register 5=0
}
}
}
