public void RTU_ADU_DocSampleReq()
{
var DocRequest = new byte[]
{
0x01,
0x10, 0x00, 0x01, 0x00, 0x01, 0x02, 0xFF, 0xFF,
0xA6, 0x31,
};
var DocResponse = new byte[]
{
0x01,
0x10, 0x00, 0x01, 0x00, 0x01,
0x50, 0x09,
};
var ClientPDU = new WriteMultipleRegistersPDU(1, new int[] { 0xFFFF });
var Device = new RTU_Device(1);
var ClientADU = new RTU_ADU(Device, ClientPDU);
CollectionAssert.AreEqual(DocRequest, ClientADU.BuildRequest());
Assert.AreEqual(Status.OK, ClientADU.CheckResponse(DocResponse));
}
[TestMethod] // Oficial Example
public void WriteMultipleRegistersPDU_DocSampleReq()
{
var ClientPDU = new WriteMultipleRegistersPDU(1, new int[] { 10, 258 });
var DacRequest = new byte[]
{
0x10, // Code Function
0x00, 0x01, // Starting Address
0x00, 0x02, // Quantity
0x04, // Byte Count
0x00, 0x0A, // Value[0]
0x01, 0x02, // Value[1]
};
var OKResponse = new byte[]
{
0x10, // Code Function
0x00, 0x01, // Starting Address
0x00, 0x02, // Quantity
};
var ExResponse = new byte[]
{
0x90,
0x01,
};
CollectionAssert.AreEqual(DacRequest, ClientPDU.BuildRequest(), "Wrong Request");
Assert.AreEqual(Status.OK, ClientPDU.CheckResponse(OKResponse), "OK Status not recognited");
Assert.AreEqual(Status.Exception, ClientPDU.CheckResponse(ExResponse), "Exception Status not recognited");
Assert.AreEqual(0x01, ClientPDU.ExceptionCode, "Exception not recognited");
}
public void WriteMultipleRegistersPDU_ArgumentRange()
{
IProtocolDataUnit TestingPDU;
try
{
TestingPDU = new WriteMultipleRegistersPDU(MinAddress - 1, new int[NormQuantity]);
Assert.Fail("Min Address Error");
}
catch (ArgumentOutOfRangeException) { }
try
{
TestingPDU = new WriteMultipleRegistersPDU(MaxAddress + 1, new int[NormQuantity]);
Assert.Fail("Max Address Error");
}
catch (ArgumentOutOfRangeException) { }
try
{
TestingPDU = new WriteMultipleRegistersPDU(NormAddress, new int[MinQuantity - 1]);
Assert.Fail("Min Quantity Error");
}
catch (ArgumentOutOfRangeException) { }
try
{
TestingPDU = new WriteMultipleRegistersPDU(NormAddress, new int[MaxQuantity + 1]);
Assert.Fail("Max Quantity Error");
}
catch (ArgumentOutOfRangeException) { }
}
public Status CheckRequest(byte[] Request)
{
if (Request.Length < 13)
return Status.Error;
Header = new MBAP(Request);
if (Header.ProtocolID != 0)
return Status.Error;
switch (Request[1])
{
case 0x01: PDU = new ReadCoilsPDU(); break;
case 0x02: PDU = new ReadDiscreteInputsPDU(); break;
case 0x03: PDU = new ReadHoldingRegistersPDU(); break;
case 0x04: PDU = new ReadInputRegistersPDU(); break;
case 0x05: PDU = new WriteSingleCoilPDU(); break;
case 0x06: PDU = new WriteSingleRegisterPDU(); break;
case 0x0F: PDU = new WriteMultipleCoilsPDU(); break;
case 0x10: PDU = new WriteMultipleRegistersPDU(); break;
default: return Status.Error;
}
var PDURequest = new byte[Request.Length - 3];
for (int i=0; i<PDURequest.Length; i++)
PDURequest[i] = Request[i + 1];
return PDU.CheckRequest(PDURequest);
}
[TestMethod] // Handling Request on Server
public void WriteMultipleRegistersPDU_LifeCycle()
{
var RandomGen = new Random();
int Address = RandomGen.Next(MinAddress, MaxAddress);
int Quantity = RandomGen.Next(MinQuantity, MaxQuantity);
#region Build Server and Values
var Server = new BaseModbusServer();
var Value = new int[Quantity];
for (int i = 0; i < Quantity; i++)
{
Value[i] = RandomGen.Next(0xFFFF);
Server.AddHoldingRegister(Address + i);
}
#endregion
var ClientPDU = new WriteMultipleRegistersPDU(Address, Value);
var Request = ClientPDU.BuildRequest();
var ServerPDU = new WriteMultipleRegistersPDU();
var ReqStatus = ServerPDU.CheckRequest(Request);
Assert.AreEqual(Status.OK, ReqStatus, "Recognition Error");
Assert.AreEqual(Address, ServerPDU.StartingAddress, "Whong Address recognition in CheckRequest");
ServerPDU.Handle(Server);
CollectionAssert.AreEqual(Value, ServerPDU.Value, "Whong Address recognition in CheckRequest");
ClientPDU.CheckResponse(ServerPDU.BuildResponse());
CollectionAssert.AreEqual(Value, ClientPDU.Value, "Whong Address recognition in CheckRequest");
}
public void WriteMultipleRegisters(IModbusDevice Device, int StartAddr, int[] Value)
{
if (!(Device is RTU_Device))
throw new ArgumentException("Wrong Type", "Device");
var PDU = new WriteMultipleRegistersPDU(StartAddr, Value);
var ADU = new RTU_ADU((Device as RTU_Device), PDU);
Query(ADU) ;
}
public Status CheckRequest(byte[] Request)
{
if ( (Request.Length < 4) || (Request[0] != Device.Address) ) // 3 = Address + FuncCode + CRC_Lo + CRC_Hi
return Status.Error;
if (CRC.Get(Request) != 0)
return Status.Error;
switch (Request[1])
{
case 0x01: PDU = new ReadCoilsPDU(); break;
case 0x02: PDU = new ReadDiscreteInputsPDU(); break;
case 0x03: PDU = new ReadHoldingRegistersPDU(); break;
case 0x04: PDU = new ReadInputRegistersPDU(); break;
case 0x05: PDU = new WriteSingleCoilPDU(); break;
case 0x06: PDU = new WriteSingleRegisterPDU(); break;
case 0x0F: PDU = new WriteMultipleCoilsPDU(); break;
case 0x10: PDU = new WriteMultipleRegistersPDU(); break;
default: return Status.Error;
}
var PDURequest = new byte[Request.Length - 3];
for (int i=0; i<PDURequest.Length; i++)
PDURequest[i] = Request[i + 1];
return PDU.CheckRequest(PDURequest);
}
