public void FC04Test()
{
// Arrange
var endpoint = EndpointSource.GetNext();
var server = new ModbusTcpServer();
server.Start(endpoint);
lock (server.Lock)
{
var buffer = server.GetInputRegisterBuffer <float>();
buffer[6] = 65.455F;
buffer[7] = 24;
buffer[8] = 25;
}
var client = new ModbusTcpClient();
client.Connect(endpoint);
// Act
var actual = client.ReadInputRegisters <float>(0, 2, 10);
// Assert
var expected = _array;
Assert.True(expected.SequenceEqual(actual.ToArray()));
}
public void CanReadMaximumNumberOfRegisters()
{
// Arrange
var endpoint = EndpointSource.GetNext();
using var server = new ModbusTcpServer();
server.Start(endpoint);
var client = new ModbusTcpClient();
client.Connect(endpoint);
// Act
client.ReadHoldingRegisters <ushort>(0, 0, 125);
client.ReadInputRegisters <ushort>(0, 0, 125);
}
static void DoClientWork(ModbusTcpClient client, ILogger logger)
{
Span <byte> data;
var sleepTime = TimeSpan.FromMilliseconds(100);
var unitIdentifier = (byte)0xFF;
var startingAddress = (ushort)0;
var registerAddress = (ushort)0;
// ReadHoldingRegisters = 0x03, // FC03
data = client.ReadHoldingRegisters(unitIdentifier, startingAddress, 10);
logger.LogInformation("FC03 - ReadHoldingRegisters: Done");
Thread.Sleep(sleepTime);
// WriteMultipleRegisters = 0x10, // FC16
client.WriteMultipleRegisters(unitIdentifier, startingAddress, new byte[] { 10, 00, 20, 00, 30, 00, 255, 00, 255, 01 });
logger.LogInformation("FC16 - WriteMultipleRegisters: Done");
Thread.Sleep(sleepTime);
// ReadCoils = 0x01, // FC01
data = client.ReadCoils(unitIdentifier, startingAddress, 10);
logger.LogInformation("FC01 - ReadCoils: Done");
Thread.Sleep(sleepTime);
// ReadDiscreteInputs = 0x02, // FC02
data = client.ReadDiscreteInputs(unitIdentifier, startingAddress, 10);
logger.LogInformation("FC02 - ReadDiscreteInputs: Done");
Thread.Sleep(sleepTime);
// ReadInputRegisters = 0x04, // FC04
data = client.ReadInputRegisters(unitIdentifier, startingAddress, 10);
logger.LogInformation("FC04 - ReadInputRegisters: Done");
Thread.Sleep(sleepTime);
// WriteSingleCoil = 0x05, // FC05
client.WriteSingleCoil(unitIdentifier, registerAddress, true);
logger.LogInformation("FC05 - WriteSingleCoil: Done");
Thread.Sleep(sleepTime);
// WriteSingleRegister = 0x06, // FC06
client.WriteSingleRegister(unitIdentifier, registerAddress, new byte[] { 65, 67 });
logger.LogInformation("FC06 - WriteSingleRegister: Done");
}
public void ThrowsWhenReadingTooManyRegisters()
{
// Arrange
var endpoint = EndpointSource.GetNext();
using var server = new ModbusTcpServer();
server.Start(endpoint);
var client = new ModbusTcpClient();
client.Connect(endpoint);
// Act
Action action1 = () => client.ReadHoldingRegisters <ushort>(0, 0, 126);
Action action2 = () => client.ReadInputRegisters <ushort>(0, 0, 126);
// Assert
Assert.Throws <ModbusException>(action1);
Assert.Throws <ModbusException>(action2);
}
