public static Message CreateReadCoilStatusCommand(SlaveAddress slaveAddress, CoilAddress firstCoil, ushort numberOfCoils)
{
var data = new List <byte>();
WriteSlaveAddress(data, slaveAddress);
WriteFunctionCode(data, FunctionCode.ReadCoilStatus);
WriteCoilAddress(data, firstCoil);
WriteBigEndianUInt16(data, numberOfCoils);
return(CreateFromRaw(data));
}
public CoilVariable(ModbusControllerConnection connection, CoilAddress address)
{
_connection = connection;
_address = address;
}
public static Message CreateForceSingleCoilCommand(SlaveAddress slaveAddress, CoilAddress coil, bool desiredState)
{
var data = new List <byte>();
WriteSlaveAddress(data, slaveAddress);
WriteFunctionCode(data, FunctionCode.ForceSingleCoil);
WriteCoilAddress(data, coil);
const byte On = 0xff;
const byte Off = 0x00;
data.Add(desiredState ? On : Off);
data.Add(0x00);
return(CreateFromRaw(data));
}
private static void WriteCoilAddress(List <byte> buffer, CoilAddress address)
{
WriteBigEndianUInt16(buffer, address.WireValue);
}
public static Message CreateForceMultipleCoilsCommand(SlaveAddress slaveAddress, CoilAddress firstCoil, bool[] desiredStates)
{
if (desiredStates == null)
{
throw new ArgumentNullException();
}
if (desiredStates.Length == 0)
{
throw new ArgumentException("Must write at least one coil.");
}
if (desiredStates.Length > MaxBooleanArrayLength)
{
throw new ArgumentException("Too many coils.");
}
var data = new List <byte>();
WriteSlaveAddress(data, slaveAddress);
WriteFunctionCode(data, FunctionCode.ForceSingleCoil);
WriteCoilAddress(data, firstCoil);
WriteBigEndianUInt16(data, (ushort)desiredStates.Length);
WriteLengthPrefixedPackedBooleanArray(data, desiredStates);
return(CreateFromRaw(data));
}
internal void WriteCoil(CoilAddress coil, bool value)
{
_master.WriteSingleCoil(_slaveRaw, coil.WireValue, value);
}
internal bool[] ReadCoils(CoilAddress firstCoil, ushort numberOfCoils)
{
return(_master.ReadCoils(_slaveRaw, firstCoil.WireValue, numberOfCoils));
}