private byte[] CreateAnswer(ModbusProtocol receiveData, ModbusProtocol sendData)
{
byte[] answer;
switch (receiveData.FunctionCode)
{
// Read Coils
case 1:
answer = ReadCoils(receiveData, sendData);
break;
// Read Input Registers
case 2:
answer = ReadDiscreteInputs(receiveData, sendData);
break;
// Read Holding Registers
case 3:
answer = ReadHoldingRegisters(receiveData, sendData);
break;
// Read Input Registers
case 4:
answer = ReadInputRegisters(receiveData, sendData);
break;
// Write single coil
case 5:
answer = WriteSingleCoil(receiveData, sendData);
break;
// Write single register
case 6:
answer = WriteSingleRegister(receiveData, sendData);
break;
// Write Multiple coils
case 15:
answer = WriteMultipleCoils(receiveData, sendData);
break;
// Write Multiple registers
case 16:
answer = WriteMultipleRegisters(receiveData, sendData);
break;
// ReadWrite Multiple registers
case 23:
answer = ReadWriteMultipleRegisters(receiveData, sendData);
break;
// Error: Function Code not supported
default:
sendData.ErrorCode = (byte)(receiveData.FunctionCode + 0x80);
sendData.ExceptionCode = 1;
answer = ComposeException(sendData.ErrorCode, sendData.ExceptionCode, receiveData, sendData);
break;
}
sendData.TimeStamp = DateTime.Now;
return(answer);
}
private byte[] ComposeException(int errorCode, int exceptionCode, ModbusProtocol receiveData, ModbusProtocol sendData)
{
sendData.IsResponse = true;
sendData.TransactionIdentifier = receiveData.TransactionIdentifier;
sendData.ProtocolIdentifier = receiveData.ProtocolIdentifier;
sendData.UnitIdentifier = receiveData.UnitIdentifier;
sendData.ErrorCode = (byte)errorCode;
sendData.ExceptionCode = (byte)exceptionCode;
if (sendData.ExceptionCode > 0)
{
sendData.Length = 0x03;
}
else
{
sendData.Length = (ushort)(0x03 + sendData.ByteCount);
}
byte[] outputBuffer;
if (sendData.ExceptionCode > 0)
{
outputBuffer = new byte[9];
}
else
{
outputBuffer = new byte[9 + sendData.ByteCount];
}
byte[] b2;// ??? = new byte[2];
sendData.Length = (byte)(outputBuffer.Length - 6);
//Set Transaction identifier
b2 = BitConverter.GetBytes((int)sendData.TransactionIdentifier);
outputBuffer[0] = b2[1];
outputBuffer[1] = b2[0];
//Set Protocol identifier
b2 = BitConverter.GetBytes((int)sendData.ProtocolIdentifier);
outputBuffer[2] = b2[1];
outputBuffer[3] = b2[0];
//Set length
b2 = BitConverter.GetBytes((int)sendData.Length);
outputBuffer[4] = b2[1];
outputBuffer[5] = b2[0];
//Set init Identifier
outputBuffer[6] = sendData.UnitIdentifier;
outputBuffer[7] = sendData.ErrorCode;
outputBuffer[8] = sendData.ExceptionCode;
return(outputBuffer);
}
private byte[] WriteMultipleRegisters(ModbusProtocol receiveData, ModbusProtocol sendData)
{
sendData.IsResponse = true;
sendData.TransactionIdentifier = receiveData.TransactionIdentifier;
sendData.ProtocolIdentifier = receiveData.ProtocolIdentifier;
sendData.UnitIdentifier = this._unitIdentifier;
sendData.FunctionCode = receiveData.FunctionCode;
sendData.StartingAddress = receiveData.StartingAddress;
sendData.Quantity = receiveData.Quantity;
if ((receiveData.Quantity == 0x0000) || (receiveData.Quantity > 0x07B0))
{
//Invalid Quantity
sendData.ErrorCode = (byte)(receiveData.FunctionCode + 0x80);
sendData.ExceptionCode = 3;
}
if ((((int)receiveData.StartingAddress + 1 + (int)receiveData.Quantity) > 65535) || (receiveData.StartingAddress < 0))
{
//Invalid Starting adress or Starting address + quantity
sendData.ErrorCode = (byte)(receiveData.FunctionCode + 0x80);
sendData.ExceptionCode = 2;
}
if (sendData.ExceptionCode == 0)
{
lock (_lockHoldingRegisters)
{
for (int i = 0; i < receiveData.Quantity; i++)
{
HoldingRegisters[(UInt16)(receiveData.StartingAddress + i + 1)] = unchecked ((Int16)receiveData.ReceiveRegisterValues[i]);
}
}
}
if (sendData.ExceptionCode > 0)
{
sendData.Length = 0x03;
}
else
{
sendData.Length = 0x06;
}
byte[] outputBuffer;
if (sendData.ExceptionCode > 0)
{
outputBuffer = new byte[9];
}
else
{
outputBuffer = new byte[12];
}
byte[] b2;// = new byte[2];
sendData.Length = (byte)(outputBuffer.Length - 6);
//Set Transaction identifier
b2 = BitConverter.GetBytes((int)sendData.TransactionIdentifier);
outputBuffer[0] = b2[1];
outputBuffer[1] = b2[0];
//Set Protocol identifier
b2 = BitConverter.GetBytes((int)sendData.ProtocolIdentifier);
outputBuffer[2] = b2[1];
outputBuffer[3] = b2[0];
//Set Length
b2 = BitConverter.GetBytes((int)sendData.Length);
outputBuffer[4] = b2[1];
outputBuffer[5] = b2[0];
//Set Unit Identifier
outputBuffer[6] = sendData.UnitIdentifier;
//Set Function Code
outputBuffer[7] = sendData.FunctionCode;
if (sendData.ExceptionCode > 0)
{
outputBuffer[7] = sendData.ErrorCode;
outputBuffer[8] = sendData.ExceptionCode;
sendData.SendRegisterValues = null;
}
else
{
b2 = BitConverter.GetBytes((int)receiveData.StartingAddress);
outputBuffer[8] = b2[1];
outputBuffer[9] = b2[0];
b2 = BitConverter.GetBytes((int)receiveData.Quantity);
outputBuffer[10] = b2[1];
outputBuffer[11] = b2[0];
// fire event
HoldingRegistersChanged((UInt16)(receiveData.StartingAddress + 1), receiveData.Quantity);
}
return(outputBuffer);
}
private byte[] WriteSingleCoil(ModbusProtocol receiveData, ModbusProtocol sendData)
{
sendData.IsResponse = true;
sendData.TransactionIdentifier = receiveData.TransactionIdentifier;
sendData.ProtocolIdentifier = receiveData.ProtocolIdentifier;
sendData.UnitIdentifier = this._unitIdentifier;
sendData.FunctionCode = receiveData.FunctionCode;
sendData.StartingAddress = receiveData.StartingAddress;
sendData.ReceiveCoilValues = receiveData.ReceiveCoilValues;
if ((receiveData.ReceiveCoilValues[0] != 0x0000) && (receiveData.ReceiveCoilValues[0] != 0xFF00))
{
//Invalid Value
sendData.ErrorCode = (byte)(receiveData.FunctionCode + 0x80);
sendData.ExceptionCode = 3;
}
if (((receiveData.StartingAddress + 1) > 65535) || (receiveData.StartingAddress < 0))
{
//Invalid Starting adress or Starting address + quantity
sendData.ErrorCode = (byte)(receiveData.FunctionCode + 0x80);
sendData.ExceptionCode = 2;
}
if (sendData.ExceptionCode == 0)
{
if (receiveData.ReceiveCoilValues[0] == 0xFF00)
{
lock (_lockCoils)
Coils[(UInt16)(receiveData.StartingAddress + 1)] = true;
}
if (receiveData.ReceiveCoilValues[0] == 0x0000)
{
lock (_lockCoils)
Coils[(UInt16)(receiveData.StartingAddress + 1)] = false;
}
}
if (sendData.ExceptionCode > 0)
{
sendData.Length = 0x03;
}
else
{
sendData.Length = 0x06;
}
byte[] outputBuffer;
if (sendData.ExceptionCode > 0)
{
outputBuffer = new byte[9];
}
else
{
outputBuffer = new byte[12];
}
byte[] b2;// = new byte[2];
sendData.Length = (byte)(outputBuffer.Length - 6);
//Set Transaction identifier
b2 = BitConverter.GetBytes((int)sendData.TransactionIdentifier);
outputBuffer[0] = b2[1];
outputBuffer[1] = b2[0];
//Set Protocol identifier
b2 = BitConverter.GetBytes((int)sendData.ProtocolIdentifier);
outputBuffer[2] = b2[1];
outputBuffer[3] = b2[0];
//Set Length
b2 = BitConverter.GetBytes((int)sendData.Length);
outputBuffer[4] = b2[1];
outputBuffer[5] = b2[0];
//Set unit Identifier
outputBuffer[6] = sendData.UnitIdentifier;
//Set Function Code
outputBuffer[7] = sendData.FunctionCode;
if (sendData.ExceptionCode > 0)
{
outputBuffer[7] = sendData.ErrorCode;
outputBuffer[8] = sendData.ExceptionCode;
sendData.SendRegisterValues = null;
}
else
{
b2 = BitConverter.GetBytes((int)receiveData.StartingAddress);
outputBuffer[8] = b2[1];
outputBuffer[9] = b2[0];
b2 = BitConverter.GetBytes((int)receiveData.ReceiveCoilValues[0]);
outputBuffer[10] = b2[1];
outputBuffer[11] = b2[0];
// fire event
CoilsChanged((UInt16)(receiveData.StartingAddress + 1), 1);
}
return(outputBuffer);
}
private byte[] ReadInputRegisters(ModbusProtocol receiveData, ModbusProtocol sendData)
{
sendData.IsResponse = true;
sendData.TransactionIdentifier = receiveData.TransactionIdentifier;
sendData.ProtocolIdentifier = receiveData.ProtocolIdentifier;
sendData.UnitIdentifier = this._unitIdentifier;
sendData.FunctionCode = receiveData.FunctionCode;
if ((receiveData.Quantity < 1) || (receiveData.Quantity > 0x007D))
{
//Invalid quantity
sendData.ErrorCode = (byte)(receiveData.FunctionCode + 0x80);
sendData.ExceptionCode = 3;
}
if (((receiveData.StartingAddress + 1 + receiveData.Quantity) > 65535) || (receiveData.StartingAddress < 0))
{
//Invalid Starting adress or Starting address + quantity
sendData.ErrorCode = (byte)(receiveData.FunctionCode + 0x80);
sendData.ExceptionCode = 2;
}
if (sendData.ExceptionCode == 0)
{
sendData.ByteCount = (byte)(2 * receiveData.Quantity);
sendData.SendRegisterValues = new Int16[receiveData.Quantity];
Buffer.BlockCopy(InputRegisters.LocalArray, receiveData.StartingAddress * 2 + 2, sendData.SendRegisterValues, 0, receiveData.Quantity * 2);
}
if (sendData.ExceptionCode > 0)
{
sendData.Length = 0x03;
}
else
{
sendData.Length = (UInt16)(0x03 + sendData.ByteCount);
}
byte[] outputBuffer;
if (sendData.ExceptionCode > 0)
{
outputBuffer = new byte[9];
}
else
{
outputBuffer = new byte[9 + sendData.ByteCount];
}
byte[] b2;// = new byte[2];
sendData.Length = (byte)(outputBuffer.Length - 6);
//Set Transaction identifier
b2 = BitConverter.GetBytes((int)sendData.TransactionIdentifier);
outputBuffer[0] = b2[1];
outputBuffer[1] = b2[0];
//Set Protocol identifier
b2 = BitConverter.GetBytes((int)sendData.ProtocolIdentifier);
outputBuffer[2] = b2[1];
outputBuffer[3] = b2[0];
//Set Length
b2 = BitConverter.GetBytes((int)sendData.Length);
outputBuffer[4] = b2[1];
outputBuffer[5] = b2[0];
//Set Unit Identifier
outputBuffer[6] = sendData.UnitIdentifier;
//Set Function Code
outputBuffer[7] = sendData.FunctionCode;
//Set ByteCount
outputBuffer[8] = sendData.ByteCount;
if (sendData.ExceptionCode > 0)
{
outputBuffer[7] = sendData.ErrorCode;
outputBuffer[8] = sendData.ExceptionCode;
sendData.SendRegisterValues = null;
}
if (sendData.SendRegisterValues != null)
{
for (int i = 0; i < (sendData.ByteCount / 2); i++)
{
b2 = BitConverter.GetBytes((Int16)sendData.SendRegisterValues[i]);
outputBuffer[9 + i * 2] = b2[1];
outputBuffer[10 + i * 2] = b2[0];
}
}
return(outputBuffer);
}
public byte[] ProcessReceivedData(byte[] inputBuffer)
{
ModbusProtocol receiveData = new ModbusProtocol();
ModbusProtocol sendData = new ModbusProtocol();
try
{
UInt16[] word = new UInt16[1];
byte[] b2 = new byte[2];//byteData
receiveData.TimeStamp = DateTime.Now;
receiveData.IsRequest = true;
// Lese Transaction identifier
b2[1] = inputBuffer[0];
b2[0] = inputBuffer[1];
Buffer.BlockCopy(b2, 0, word, 0, 2);
receiveData.TransactionIdentifier = word[0];
// Lese Protocol identifier
b2[1] = inputBuffer[2];
b2[0] = inputBuffer[3];
Buffer.BlockCopy(b2, 0, word, 0, 2);
receiveData.ProtocolIdentifier = word[0];
// Lese length
b2[1] = inputBuffer[4];
b2[0] = inputBuffer[5];
Buffer.BlockCopy(b2, 0, word, 0, 2);
receiveData.Length = word[0];
// Lese unit identifier
receiveData.UnitIdentifier = inputBuffer[6];
// Check UnitIdentifier
if ((receiveData.UnitIdentifier != this._unitIdentifier) & (receiveData.UnitIdentifier != 0))
{
return(new byte[0]);//!!!
}
// Lese function code
receiveData.FunctionCode = inputBuffer[7];
// Lese starting address
b2[1] = inputBuffer[8];
b2[0] = inputBuffer[9];
Buffer.BlockCopy(b2, 0, word, 0, 2);
receiveData.StartingAddress = word[0];
if (receiveData.FunctionCode <= 4)
{
// Lese quantity
b2[1] = inputBuffer[10];
b2[0] = inputBuffer[11];
Buffer.BlockCopy(b2, 0, word, 0, 2);
receiveData.Quantity = word[0];
}
else if (receiveData.FunctionCode == 5)
{
receiveData.ReceiveCoilValues = new UInt16[1];
// Lese Value
b2[1] = inputBuffer[10];
b2[0] = inputBuffer[11];
Buffer.BlockCopy(b2, 0, receiveData.ReceiveCoilValues, 0, 2);
}
else if (receiveData.FunctionCode == 6)
{
receiveData.ReceiveRegisterValues = new UInt16[1];
// Lese Value
b2[1] = inputBuffer[10];
b2[0] = inputBuffer[11];
Buffer.BlockCopy(b2, 0, receiveData.ReceiveRegisterValues, 0, 2);
}
else if (receiveData.FunctionCode == 15)
{
// Lese quantity
b2[1] = inputBuffer[10];
b2[0] = inputBuffer[11];
Buffer.BlockCopy(b2, 0, word, 0, 2);
receiveData.Quantity = word[0];
receiveData.ByteCount = inputBuffer[12];
if ((receiveData.ByteCount % 2) != 0)
{
receiveData.ReceiveCoilValues = new UInt16[receiveData.ByteCount / 2 + 1];
}
else
{
receiveData.ReceiveCoilValues = new UInt16[receiveData.ByteCount / 2];
}
// Lese Value
Buffer.BlockCopy(inputBuffer, 13, receiveData.ReceiveCoilValues, 0, receiveData.ByteCount);
}
else if (receiveData.FunctionCode == 16)
{
// Lese quantity
b2[1] = inputBuffer[10];
b2[0] = inputBuffer[11];
Buffer.BlockCopy(b2, 0, word, 0, 2);
receiveData.Quantity = word[0];
receiveData.ByteCount = inputBuffer[12];
receiveData.ReceiveRegisterValues = new UInt16[receiveData.Quantity];
for (int i = 0; i < receiveData.Quantity; i++)
{
// Lese Value
b2[1] = inputBuffer[13 + i * 2];
b2[0] = inputBuffer[14 + i * 2];
Buffer.BlockCopy(b2, 0, receiveData.ReceiveRegisterValues, i * 2, 2);
}
}
else if (receiveData.FunctionCode == 23)
{
// Lese starting Address Read
b2[1] = inputBuffer[8];
b2[0] = inputBuffer[9];
Buffer.BlockCopy(b2, 0, word, 0, 2);
receiveData.StartingAddressRead = word[0];
// Lese quantity Read
b2[1] = inputBuffer[10];
b2[0] = inputBuffer[11];
Buffer.BlockCopy(b2, 0, word, 0, 2);
receiveData.QuantityRead = word[0];
// Lese starting Address Write
b2[1] = inputBuffer[12];
b2[0] = inputBuffer[13];
Buffer.BlockCopy(b2, 0, word, 0, 2);
receiveData.StartingAddressWrite = word[0];
// Lese quantity Write
b2[1] = inputBuffer[14];
b2[0] = inputBuffer[15];
Buffer.BlockCopy(b2, 0, word, 0, 2);
receiveData.QuantityWrite = word[0];
receiveData.ByteCount = inputBuffer[16];
receiveData.ReceiveRegisterValues = new UInt16[receiveData.QuantityWrite];
for (int i = 0; i < receiveData.QuantityWrite; i++)
{
// Lese Value
b2[1] = inputBuffer[17 + i * 2];
b2[0] = inputBuffer[18 + i * 2];
Buffer.BlockCopy(b2, 0, receiveData.ReceiveRegisterValues, i * 2, 2);
}
}
}
catch { }
return(CreateAnswer(receiveData, sendData));
}
private byte[] ReadDiscreteInputs(ModbusProtocol receiveData, ModbusProtocol sendData)
{
sendData.IsResponse = true;
sendData.TransactionIdentifier = receiveData.TransactionIdentifier;
sendData.ProtocolIdentifier = receiveData.ProtocolIdentifier;
sendData.UnitIdentifier = this._unitIdentifier;
sendData.FunctionCode = receiveData.FunctionCode;
if ((receiveData.Quantity < 1) || (receiveData.Quantity > 0x07D0))
{
//Invalid quantity
sendData.ErrorCode = (byte)(receiveData.FunctionCode + 0x80);
sendData.ExceptionCode = 3;
}
if (((receiveData.StartingAddress + 1 + receiveData.Quantity) > 65535) || (receiveData.StartingAddress < 0))
{
//Invalid Starting adress or Starting address + quantity
sendData.ErrorCode = (byte)(receiveData.FunctionCode + 0x80);
sendData.ExceptionCode = 2;
}
if (sendData.ExceptionCode == 0)
{
if ((receiveData.Quantity % 8) == 0)
{
sendData.ByteCount = (byte)(receiveData.Quantity / 8);
}
else
{
sendData.ByteCount = (byte)(receiveData.Quantity / 8 + 1);
}
sendData.SendCoilValues = new bool[receiveData.Quantity];
Array.Copy(DiscreteInputs.LocalArray, receiveData.StartingAddress + 1, sendData.SendCoilValues, 0, receiveData.Quantity);
}
byte[] outputBuffer;
if (sendData.ExceptionCode > 0)
{
outputBuffer = new byte[9];
}
else
{
outputBuffer = new byte[9 + sendData.ByteCount];
}
byte[] b2;// = new byte[2];
sendData.Length = (byte)(outputBuffer.Length - 6);
//Set Transaction identifier
b2 = BitConverter.GetBytes((int)sendData.TransactionIdentifier);
outputBuffer[0] = b2[1];
outputBuffer[1] = b2[0];
//Set Protocol identifier
b2 = BitConverter.GetBytes((int)sendData.ProtocolIdentifier);
outputBuffer[2] = b2[1];
outputBuffer[3] = b2[0];
//Set Length
b2 = BitConverter.GetBytes((int)sendData.Length);
outputBuffer[4] = b2[1];
outputBuffer[5] = b2[0];
//Set Unit Identifier
outputBuffer[6] = sendData.UnitIdentifier;
//Set Function Code
outputBuffer[7] = sendData.FunctionCode;
//Set ByteCount
outputBuffer[8] = sendData.ByteCount;
if (sendData.ExceptionCode > 0)
{
outputBuffer[7] = sendData.ErrorCode;
outputBuffer[8] = sendData.ExceptionCode;
sendData.SendCoilValues = null;
}
if (sendData.SendCoilValues != null)
{
for (int i = 0; i < sendData.ByteCount; i++)
{
b2 = new byte[2];
for (int j = 0; j < 8; j++)
{
byte boolValue;
if (sendData.SendCoilValues[i * 8 + j] == true)
{
boolValue = 1;
}
else
{
boolValue = 0;
}
b2[1] = (byte)((b2[1]) | (boolValue << j));
if ((i * 8 + j + 1) >= sendData.SendCoilValues.Length)
{
break;
}
}
outputBuffer[9 + i] = b2[1];
}
}
return(outputBuffer);
}
private byte[] ReadWriteMultipleRegisters(ModbusProtocol receiveData, ModbusProtocol sendData)
{
sendData.IsResponse = true;
sendData.TransactionIdentifier = receiveData.TransactionIdentifier;
sendData.ProtocolIdentifier = receiveData.ProtocolIdentifier;
sendData.UnitIdentifier = this._unitIdentifier;
sendData.FunctionCode = receiveData.FunctionCode;
if ((receiveData.QuantityRead < 0x0001) ||
(receiveData.QuantityRead > 0x007D) ||
(receiveData.QuantityWrite < 0x0001) ||
(receiveData.QuantityWrite > 0x0079) ||
(receiveData.ByteCount != (receiveData.QuantityWrite * 2)))
{
//Invalid Quantity
sendData.ErrorCode = (byte)(receiveData.FunctionCode + 0x80);
sendData.ExceptionCode = 3;
}
if (((receiveData.StartingAddressRead + 1 + receiveData.QuantityRead) > 65535) ||
((receiveData.StartingAddressWrite + 1 + receiveData.QuantityWrite) > 65535) ||
(receiveData.QuantityWrite < 0) ||
(receiveData.QuantityRead < 0))
{
//Invalid Starting adress or Starting address + quantity
sendData.ErrorCode = (byte)(receiveData.FunctionCode + 0x80);
sendData.ExceptionCode = 2;
}
if (sendData.ExceptionCode == 0)
{
sendData.SendRegisterValues = new Int16[receiveData.QuantityRead];
lock (_lockHoldingRegisters)
{
Buffer.BlockCopy(
HoldingRegisters.LocalArray,
receiveData.StartingAddressRead * 2 + 2,
sendData.SendRegisterValues,
0,
receiveData.QuantityRead * 2);
for (int i = 0; i < receiveData.QuantityWrite; i++)
{
HoldingRegisters[(UInt16)(receiveData.StartingAddressWrite + i + 1)] = unchecked ((Int16)receiveData.ReceiveRegisterValues[i]);
}
}
sendData.ByteCount = (byte)(2 * receiveData.QuantityRead);
}
if (sendData.ExceptionCode > 0)
{
sendData.Length = 0x03;
}
else
{
sendData.Length = Convert.ToUInt16(3 + 2 * receiveData.QuantityRead);
}
byte[] outputBuffer;
if (sendData.ExceptionCode > 0)
{
outputBuffer = new byte[9];
}
else
{
outputBuffer = new byte[9 + sendData.ByteCount];
}
byte[] b2;// = new byte[2];
//Set Transaction identifier
b2 = BitConverter.GetBytes((int)sendData.TransactionIdentifier);
outputBuffer[0] = b2[1];
outputBuffer[1] = b2[0];
//Set Protocol identifier
b2 = BitConverter.GetBytes((int)sendData.ProtocolIdentifier);
outputBuffer[2] = b2[1];
outputBuffer[3] = b2[0];
//Set Length
b2 = BitConverter.GetBytes((int)sendData.Length);
outputBuffer[4] = b2[1];
outputBuffer[5] = b2[0];
//Set Unit Identifier
outputBuffer[6] = sendData.UnitIdentifier;
//Set Function Code
outputBuffer[7] = sendData.FunctionCode;
//Set ByteCount
outputBuffer[8] = sendData.ByteCount;
if (sendData.ExceptionCode > 0)
{
outputBuffer[7] = sendData.ErrorCode;
outputBuffer[8] = sendData.ExceptionCode;
sendData.SendRegisterValues = null;
}
else
{
if (sendData.SendRegisterValues != null)
{
for (int i = 0; i < (sendData.ByteCount / 2); i++)
{
b2 = BitConverter.GetBytes((Int16)sendData.SendRegisterValues[i]);
outputBuffer[9 + i * 2] = b2[1];
outputBuffer[10 + i * 2] = b2[0];
}
}
// fire event
HoldingRegistersChanged((UInt16)(receiveData.StartingAddressWrite + 1), receiveData.QuantityWrite);
}
return(outputBuffer);
}