/// <summary>
/// Reads words holding registers
/// </summary>
/// <param name="offset">The register offset</param>
/// <param name="count">Number of words to read</param>
/// <returns>The words read</returns>
public short[] ReadRegisters(int offset, int count, byte unit = 0x01)
{
if (tcpClient == null)
{
throw new Exception("Object not intialized");
}
var request = new ModbusRequest03(offset, count, unit);
var buffer = request.ToNetworkBuffer();
using (var cancellationTokenSource = new CancellationTokenSource(socketTimeout))
{
using (cancellationTokenSource.Token.Register(() => transportStream.Close()))
{
transportStream.Write(buffer, 0, buffer.Length);
}
}
var response = ReadResponse <ModbusReply03>();
return(ReadAsShort(response.Data));
}
/// <summary>
/// Reads words holding registers
/// </summary>
/// <param name="offset">The register offset</param>
/// <param name="count">Number of words to read</param>
/// <returns>The words read</returns>
public async Task <IModbusReadResponseBase> ReadHoldingRegistersAsync(int offset, int count, byte unit = 0x01)
{
if (tcpClient == null)
{
throw new Exception("Object not intialized");
}
var request = new ModbusRequest03(offset, count, unit);
var buffer = request.ToNetworkBuffer();
using (var cancellationTokenSource = new CancellationTokenSource(socketTimeout))
{
using (cancellationTokenSource.Token.Register(() => transportStream.Close()))
{
await transportStream.WriteAsync(buffer, 0, buffer.Length, cancellationTokenSource.Token);
}
}
var response = await ReadResponseAsync <ModbusReply03>();
return(response);
}
/// <summary>
/// Reads floats from holding registers
/// </summary>
/// <param name="offset">The register offset</param>
/// <param name="count">Number of floats to read</param>
/// <returns>The floats read</returns>
public async Task <float[]> ReadRegistersFloatsAsync(int offset, int count)
{
if (tcpClient == null)
{
throw new Exception("Object not intialized");
}
var request = new ModbusRequest03(offset, count * 2 /* Float is 2 word */);
var buffer = request.ToNetworkBuffer();
using (var cancellationTokenSource = new CancellationTokenSource(socketTimeout))
{
using (cancellationTokenSource.Token.Register(() => transportStream.Close()))
{
await transportStream.WriteAsync(buffer, 0, buffer.Length, cancellationTokenSource.Token);
}
}
var response = await ReadResponseAsync <ModbusReply03>();
return(ReadAsFloat(response.Data));
}
