/// <summary>
/// Method to send a Modbus write request to a Modbus slave providing common
/// communication setup and associated exception handling (logging).
/// A TCP client is created and used to send the request to the Modbus TCP client.
/// The following requests are supported:
///
/// Multiple Coils
/// Multiple Holding Register
///
/// Additional datatypes with read / write access (coils and holding registers) are supported:
///
/// Bool (multiple coils)
/// Bytes (multiple holding registers)
/// Short (multiple holding registers)
/// UShort (multiple holding registers)
/// Int32 (multiple holding registers)
/// UInt32 (multiple holding registers)
/// Float (multiple holding registers)
/// Double (multiple holding registers)
/// Long (multiple holding registers)
/// ULong (multiple holding registers)
///
/// </summary>
/// <param name="request">The <see cref="ModbusRequestData"/> data.</param>
/// <param name="data">The data value.</param>
/// <param name="function">The function name.</param>
/// <returns>A task returning an action method result.</returns>
protected async Task <IActionResult> ModbusWriteArrayRequest <T>(ModbusRequestData request, T[] data, string function)
{
try
{
request.Master = _client.RtuMaster;
if (_client.Connect())
{
switch (function)
{
case "WriteCoilsAsync":
{
bool[] values = (bool[])Convert.ChangeType(data, typeof(bool[]));
await _client.WriteMultipleCoilsAsync(request.Slave.ID, request.Offset, values);
_logger.LogTrace($"{function}() OK.");
return(Ok(request));
}
case "WriteHoldingRegistersAsync":
{
ushort[] values = (ushort[])Convert.ChangeType(data, typeof(ushort[]));
await _client.WriteMultipleRegistersAsync(request.Slave.ID, request.Offset, values);
_logger.LogTrace($"{function}() OK.");
return(Ok(request));
}
case "WriteBoolArrayAsync":
{
bool[] values = (bool[])Convert.ChangeType(data, typeof(bool[]));
await _client.WriteBoolArrayAsync(request.Slave.ID, request.Offset, values);
_logger.LogTrace($"{function}() OK.");
return(Ok(request));
}
case "WriteBytesAsync":
{
byte[] values = (byte[])Convert.ChangeType(data, typeof(byte[]));
await _client.WriteBytesAsync(request.Slave.ID, request.Offset, values);
_logger.LogTrace($"{function}() OK.");
return(Ok(request));
}
case "WriteShortArrayAsync":
{
short[] values = (short[])Convert.ChangeType(data, typeof(short[]));
await _client.WriteShortArrayAsync(request.Slave.ID, request.Offset, values);
_logger.LogTrace($"{function}() OK.");
return(Ok(request));
}
case "WriteUShortArrayAsync":
{
ushort[] values = (ushort[])Convert.ChangeType(data, typeof(ushort[]));
await _client.WriteUShortArrayAsync(request.Slave.ID, request.Offset, values);
_logger.LogTrace($"{function}() OK.");
return(Ok(request));
}
case "WriteInt32ArrayAsync":
{
int[] values = (int[])Convert.ChangeType(data, typeof(int[]));
await _client.WriteInt32ArrayAsync(request.Slave.ID, request.Offset, values);
_logger.LogTrace($"{function}() OK.");
return(Ok(request));
}
case "WriteUInt32ArrayAsync":
{
uint[] values = (uint[])Convert.ChangeType(data, typeof(uint[]));
await _client.WriteUInt32ArrayAsync(request.Slave.ID, request.Offset, values);
_logger.LogTrace($"{function}() OK.");
return(Ok(request));
}
case "WriteFloatArrayAsync":
{
float[] values = (float[])Convert.ChangeType(data, typeof(float[]));
await _client.WriteFloatArrayAsync(request.Slave.ID, request.Offset, values);
_logger.LogTrace($"{function}() OK.");
return(Ok(request));
}
case "WriteDoubleArrayAsync":
{
double[] values = (double[])Convert.ChangeType(data, typeof(double[]));
await _client.WriteDoubleArrayAsync(request.Slave.ID, request.Offset, values);
_logger.LogTrace($"{function}() OK.");
return(Ok(request));
}
case "WriteLongArrayAsync":
{
long[] values = (long[])Convert.ChangeType(data, typeof(long[]));
await _client.WriteLongArrayAsync(request.Slave.ID, request.Offset, values);
_logger.LogTrace($"{function}() OK.");
return(Ok(request));
}
case "WriteULongArrayAsync":
{
ulong[] values = (ulong[])Convert.ChangeType(data, typeof(ulong[]));
await _client.WriteULongArrayAsync(request.Slave.ID, request.Offset, values);
_logger.LogTrace($"{function}() OK.");
return(Ok(request));
}
default:
_client.Disconnect();
_logger.LogError($"RTU master write request {function}() not supported.");
return(NotFound($"RTU master write request {function}() not supported."));
}
}
else
{
_logger.LogError($"RTU master ({request.Master.SerialPort}) not open.");
return(NotFound("RTU master COM port not open."));
}
}
catch (UnauthorizedAccessException uae)
{
_logger.LogError(uae, $"{function}() Unauthorized Access Exception.");
return(NotFound($"Unauthorized Access Exception: {uae.Message}"));
}
catch (ArgumentOutOfRangeException are)
{
_logger.LogError(are, $"{function}() Argument out of Range Exception.");
return(BadRequest($"Argument out of Range Exception: {are.Message}"));
}
catch (ArgumentException aex)
{
_logger.LogError(aex, $"{function}() Argument Exception.");
return(BadRequest($"Argument Exception: {aex.Message}"));
}
catch (NModbus.SlaveException mse)
{
_logger.LogError(mse, $"{function}() Modbus SlaveException.");
return(StatusCode(502, $"Modbus SlaveException: {mse.Message}"));
}
catch (System.IO.IOException ioe)
{
_logger.LogError(ioe, $"{function}() IO Exception.");
return(StatusCode(500, $"IO Exception: {ioe.Message}"));
}
catch (TimeoutException tex)
{
_logger.LogError(tex, $"{function}() Timeout Exception.");
return(StatusCode(500, $"Timeout Exception: {tex.Message}"));
}
catch (Exception ex)
{
_logger.LogError(ex, $"{function}() Exception.");
return(StatusCode(500, $"Exception: {ex.Message}"));
}
finally
{
if (_client.Connected)
{
_client.Disconnect();
}
}
}