Innovenergy_trunk/csharp/Lib/Protocols/Modbus/Protocol/Frames/Commands/ReadCoilsCommandFrame.cs

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using InnovEnergy.Lib.Protocols.Modbus.Protocol.Frames.Accessors;
using InnovEnergy.Lib.Protocols.Modbus.Protocol.Frames.Replies;
using InnovEnergy.Lib.Utils;
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using static InnovEnergy.Lib.Protocols.Modbus.Protocol.FunctionCode;
namespace InnovEnergy.Lib.Protocols.Modbus.Protocol.Frames.Commands;
internal class ReadCoilsCommandFrame : ModbusFrame
{
private const Int32 Size = 6;
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public MbWord ReadAddress => Data.WordAt(2);
public MbWord NumberOfCoils => Data.WordAt(4);
public ReadCoilsCommandFrame(Byte slave, UInt16 readAddress, UInt16 nBits) : base(Size)
{
if (nBits > Constants.MaxCoils)
throw new ArgumentOutOfRangeException($"Maximum number of registers ({Constants.MaxCoils}) exceeeded!", nameof(nBits));
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SlaveAddress .Set(slave);
FunctionCode .Set(ReadCoils);
ReadAddress .Set(readAddress);
NumberOfCoils.Set(nBits);
}
private ReadCoilsCommandFrame(ArraySegment<Byte> data) : base(data)
{
if (data.Count != Size)
throw new ArgumentException($"Expecting an array of size {Size}", nameof(data));
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AssertFunctionCode(ReadCoils);
}
public ReadCoilsResponseFrame VerifyResponse(ReadCoilsResponseFrame response)
{
if (response.SlaveAddress != SlaveAddress)
throw new UnexpectedResponseFieldException(nameof(response.SlaveAddress), SlaveAddress.ToString(), response.SlaveAddress);
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if (response.Coils.Count != Math.Ceiling(NumberOfCoils / 8.0).ConvertTo<Int32>() * 8)
throw new UnexpectedResponseFieldException(nameof(response.Coils), NumberOfCoils.ToString(), response.Coils.Count);
return response;
}
public static ReadCoilsCommandFrame Parse(ArraySegment<Byte> data)
{
return new ReadCoilsCommandFrame(data);
}
}