50 lines
1.7 KiB
C#
50 lines
1.7 KiB
C#
using System.Configuration;
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using System.Text;
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namespace Modbus.Net.Modbus
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{
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/// <summary>
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/// Modbus/Ascii码协议连接器Tcp透传
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/// </summary>
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public class ModbusAsciiInTcpProtocolLinker : TcpProtocolLinker
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{
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/// <summary>
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/// 构造函数
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/// </summary>
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/// <param name="ip">IP地址</param>
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public ModbusAsciiInTcpProtocolLinker(string ip)
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: base(ip, int.Parse(ConfigurationManager.AppSettings["ModbusPort"] ?? "502"))
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{
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}
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/// <summary>
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/// 构造函数
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/// </summary>
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/// <param name="ip">ip地址</param>
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/// <param name="port">端口号</param>
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public ModbusAsciiInTcpProtocolLinker(string ip, int port)
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: base(ip, port)
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{
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((BaseConnector)BaseConnector).AddController(new FifoController(0));
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}
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/// <summary>
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/// 校验返回数据是否正确
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/// </summary>
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/// <param name="content">返回的数据</param>
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/// <returns>校验是否正确</returns>
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public override bool? CheckRight(byte[] content)
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{
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//ProtocolLinker不会返回null
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if (base.CheckRight(content) != true) return false;
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//CRC校验失败
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var contentString = Encoding.ASCII.GetString(content);
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if (!Crc16.GetInstance().LrcEfficacy(contentString))
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throw new ModbusProtocolErrorException(501);
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//Modbus协议错误
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if (byte.Parse(contentString.Substring(3, 2)) > 127)
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throw new ModbusProtocolErrorException(byte.Parse(contentString.Substring(5, 2)));
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return true;
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}
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}
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} |