mirror of
https://github.com/ClassicDIY/ModbusTool.git
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Graham
125 lines
3.8 KiB
C#
125 lines
3.8 KiB
C#
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/*
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* Copyright 2012 Mario Vernari (http://cetdevelop.codeplex.com/)
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/**
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* 20/Apr/2012
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* Added function code for "force multiple coils" command
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**/
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namespace ModbusLib.Protocols
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{
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/// <summary>
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/// Provide the base for any Modbus command
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/// </summary>
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public class ModbusCommand
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{
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/**
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* Class 0 functions
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**/
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public const byte FuncReadMultipleRegisters = 3;
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public const byte FuncWriteMultipleRegisters = 16;
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/**
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* Class 1 functions
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**/
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public const byte FuncReadCoils = 1;
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public const byte FuncReadInputDiscretes = 2;
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public const byte FuncReadInputRegisters = 4;
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public const byte FuncWriteCoil = 5;
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public const byte FuncWriteSingleRegister = 6;
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public const byte FuncReadExceptionStatus = 7;
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/// <summary>Constant for exception connection lost.</summary>
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public const byte ExceptionConnectionLost = 254;
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/// <summary>Constant for exception send fail.</summary>
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public const byte SendFail = 100;
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public const byte ExceptionOffset = 128;
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/**
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* Class 2 functions
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**/
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public const byte FuncForceMultipleCoils = 15;
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public const byte FuncReadCustom = 104;
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/**
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* Exceptions
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**/
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public const byte ErrorIllegalFunction = 1;
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public const byte ErrorIllegalDataAddress = 2;
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public const byte ErrorIllegalDataValue = 3;
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public const byte ErrorIllegalResponseLength = 4;
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public const byte ErrorAcknowledge = 5;
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public const byte ErrorSlaveDeviceBusy = 6;
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public const byte ErrorNegativeAcknowledge = 7;
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public const byte ErrorMemoryParity = 8;
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public delegate void OutgoingData(byte[] data);
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public delegate void IncommingData(byte[] data, int len);
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public ModbusCommand(byte fc)
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{
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FunctionCode = fc;
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}
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/// <summary>
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/// The function code of the command
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/// </summary>
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public readonly byte FunctionCode;
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/// <summary>
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/// The transaction-id of the request (often is zero)
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/// </summary>
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public int TransId;
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/// <summary>
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/// The starting offset for the involved resources
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/// </summary>
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public int Offset { get; set; }
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/// <summary>
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/// The number of involved resources
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/// </summary>
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public int Count { get; set; }
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/// <summary>
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/// The data submitted/received
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/// </summary>
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/// <remarks>
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/// As a simplification, the data type is only the <see cref="System.UInt16"/>,
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/// which should cover most of the commands.
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/// For discrete (i.e. bool) data, consider one data per cell,
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/// using zero/non-zero as boolean criteria
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/// </remarks>
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public ushort[] Data { get; set; }
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/// <summary>
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/// If non-zero, indicates the exception raised by the server
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/// </summary>
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public byte ExceptionCode { get; set; }
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/// <summary>
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/// Estimated total length (bytes) of the received command
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/// </summary>
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internal int QueryTotalLength;
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}
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}
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