基恩士PLC KV7000,8000还是比较好用的，那如何和上位机通讯，我把源码写出来了。采用上位链路通讯，基恩士官方给我们留了8501端口,这个端口有意思刚好是我生日。基恩士的资料我觉得做的特别好，能快速写源代码得益于官方资料特别详细，对了，他的通讯采用是ASCII码直接通讯。比如你读到的ASCII码是666，那他的实际值也就是666。好了上代码，如果热度比较高，大家有不清楚的地方，我出视频讲解。

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;using System.Net.Sockets;using System.Threading;using System.Net;namespace WDBaseCommuntionHelper{    public class KV7_8000Service    {        Socket KVTCPClicent;        readonly object LockKVTCP = new object();        public enum DataType        {            ///             /// 16位无符号            ///             U,            ///             /// 16位有符号            ///             S,            ///             /// 32位无符号            ///             D,            ///             /// 32位有符号            ///             L,            ///             /// 16位16进制数            ///             H,            ///             /// 默认            ///             N        }        #region 命令        ///         /// 更改模式        ///         const string Command1 = "M";        ///         /// 清除错误        ///         const string Command2 = "ER";        ///         /// 检查错误编号        ///         const string Command3 = "?E";        ///         /// 查询机型        ///         const string Command4 = "?K";        ///         /// 检查运行模式        ///         const string Command5 = "?M";        ///         /// 时间设定        ///         const string Command6 = "WRT";        ///         /// 强制置位        ///         const string Command7 = "ST";        ///         /// 强制复位        ///         const string Command8 = "RS";        ///         /// 连续强制置位        ///         const string Command9 = "STS";        ///         /// 连续强制复位        ///         const string Command10 = "RSS";        ///         /// 读取数据        ///         const string Command11 = "RD";        ///         /// 读取连续数据        ///         const string Command12 = "RDS";        ///         /// 读取连续数据        ///         const string Command13 = "RDE";        ///         /// 写入数据        ///         const string Command14 = "WR";        ///         /// 写入连续数据        ///         const string Command15 = "WRS";        ///         /// 写入连续数据        ///         const string Command16 = "WRE";        ///         /// 写入设定值        ///         const string Command17 = "WS";        ///         /// 写入连续设定值        ///         const string Command18 = "WSS";        ///         /// 监控器登录        ///         const string Command19 = "MBS";        ///         /// 监控器登录        ///         const string Command20 = "MWS";        ///         /// 读取监控器        ///         const string Command21 = "MBR";        ///         /// 读取监控器        ///         const string Command22 = "MWR";        ///         /// 注释读取        ///         const string Command23 = "RDC";        ///         /// 存储体切换        ///         const string Command24 = "BE";        ///         /// 读取扩展单元缓冲存储器        ///         const string Command25 = "URD";        ///         /// 写入扩展单元缓冲存储器        ///         const string Command26 = "UWR";        ///         /// 回车        ///         const string CR = "";        ///         /// 空格        ///         const string SP = " ";        #endregion        Encoding encoding = Encoding.ASCII;        ///         /// PLC连接状态        ///         public bool IsConnected { get; private set; }        ///         /// 发送超时时间        ///         public int SendTimeout { get; set; } = 2000;        ///         /// 接收超时时间        ///         public int ReceiveTimeout { get; set; } = 2000;        ///         /// 等待PLC响应周期,这里一个周期10ms        ///         public int MaxDelayCycle { get; set; } = 5;        string ip;        int port;        private Dictionary plcValue = new Dictionary();        ///         /// PLC值键值对        ///         public Dictionary PlcValue { get { return plcValue; } }        ///         /// 重连        ///         ///         public bool ReConnext()        {            if (ip == string.Empty || port == 0)            {                throw new Exception("没有IP和端口请调用Connect函数连接"); return false;            }           return  Connect(ip,port);        }        ///         /// 连接PLC        ///         ///         ///         ///         public bool Connect(string ip, int port=8501)        {            if (this.ip != ip) this.ip = ip;            if (this.port != port) this.port = port;            KVTCPClicent = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);            KVTCPClicent.SendTimeout = SendTimeout;            KVTCPClicent.ReceiveTimeout = ReceiveTimeout;            IAsyncResult asyncResult=  KVTCPClicent.BeginConnect(new IPEndPoint(IPAddress.Parse(ip) ,port),null,null);            asyncResult.AsyncWaitHandle.WaitOne(3000,true);            if (!asyncResult.IsCompleted)            {                KVTCPClicent.Close();                return false;            }            return true;        }        ///         /// 改变PLC运行状态        ///         /// true让PLC运行false让PLC停止        ///         public string ChangeCPU(bool run = true)        {            string str = Command1 + (run ? "1" : "0") + CR;            return SendRecive(str);        }        ///         /// 查看PLC运行状态        ///         ///         public string SeeCPUState()        {            string str = Command5 + CR;            return SendRecive(str);        }        ///         /// 强制置位复位        ///         ///         ///         ///         public string Put(string address, bool value)        {            string str;            if (value)            {                str = Command7 + SP + address + CR;            }            else            {                str = Command8 + SP + address + CR;            }            return SendRecive(str);        }        ///         /// 连续强制置位复位        ///         ///         ///         ///         ///         public string Put(string address, bool Value, int count)        {            string str;            if (Value)            {                str = Command9 + SP + address + count + CR;            }            else            {                str = Command10 + SP + address + count + CR;            }            return SendRecive(str);        }        ///         /// 写入字数据        ///         ///         ///         ///         ///         public string Put(string address, string value, DataType tpye = DataType.N)        {            string str = Command14 + SP + address + GetDataType(tpye) + SP + value + CR;            return SendRecive(str);        }        ///         /// 写入单精度浮点数        ///         ///         ///         ///         public string Put(string address, float value)        {            List result = CalFloatToInt16(value);            return Put(address, result);        }        ///         /// 写入连续字数据        ///         ///         ///         ///         ///         public string Put(string address, List value, DataType tpye = DataType.N)        {            StringBuilder sb = new StringBuilder(Command15 + SP + address + GetDataType(tpye) + SP + value.Count);            for (int i = 0; i < value.Count; i++)            {                sb.Append(SP + value[i]);            }            sb.Append(CR);            return SendRecive(sb.ToString());        }        ///         /// 读取字数据        ///         ///         ///         ///         public string Get(string address, DataType tpye = DataType.N)        {            string str = Command11 + SP + address + GetDataType(tpye) + CR;            return SendRecive(str);        }        ///         /// 读取连续字数据        ///         ///         ///         ///         ///         public string Get(string address, int count, DataType tpye = DataType.N)        {            string str = Command13 + SP + address + GetDataType(tpye) + SP + count + CR;            return SendRecive(str);        }        public string CalRD(string str, string type, int address, int count)        {            string[] s1 = str.Split(' ');            if (count > s1.Length)            {                throw new Exception("映射长度过长");            }            for (int i = 0; i < count; i++)            {                plcValue[type + (address + i)] = s1[i].ToString();            }            return "OK";        }        ///         /// 32位浮点转16位字        ///         ///         ///         public List CalFloatToInt16(float value)        {            byte[] r1 = BitConverter.GetBytes(value);            byte[] r2 = new byte[2] { r1[0], r1[1] };            byte[] r3 = new byte[2] { r1[2], r1[3] };            int r4 = BitConverter.ToUInt16(r2, 0);            int r5 = BitConverter.ToUInt16(r3, 0);            return new List() { r4.ToString(), r5.ToString() };        }        ///         /// 2个16位字转32位浮点        ///         ///         ///         ///         public float CalInt16ToFlaot(string[] value, int startIndex)        {            byte[] r1 = BitConverter.GetBytes(Convert.ToInt16(value[startIndex]));            byte[] r2 = BitConverter.GetBytes(Convert.ToInt16(value[startIndex + 1]));            byte[] r3 = new byte[4] { r1[0], r1[1], r2[0], r2[1] };            return BitConverter.ToSingle(r3, 0);        }        ///         /// ASCII编码解码        ///         ///         ///         public string SendRecive(string str)        {            return encoding.GetString(SendRecive(encoding.GetBytes(str)));        }        ///         /// 发送接收字节数组报文        ///         ///         ///         public byte[] SendRecive(byte[] arry)        {            try            {                Monitor.Enter(LockKVTCP);                int delay = 0;                int reslut = KVTCPClicent.Send(arry);                while (KVTCPClicent.Available == 0)                {                    Thread.Sleep(10);                    delay++;                    if (delay > MaxDelayCycle)                    {                        break;                    }                }                byte[] ResByte = new byte[KVTCPClicent.Available];                reslut = KVTCPClicent.Receive(ResByte);                return ResByte;            }            catch (Exception)            {                IsConnected = false;                return null;            }            finally            {                Monitor.Exit(LockKVTCP);            }        }        ///         /// 根据数据类型生成报文        ///         ///         ///         public string GetDataType(DataType dataType)        {            string str = string.Empty;            switch (dataType)            {                case DataType.U:                    str = ".U";                    break;                case DataType.S:                    str = ".S";                    break;                case DataType.D:                    str = ".D";                    break;                case DataType.L:                    str = ".L";                    break;                case DataType.H:                    str = ".H";                    break;                case DataType.N:                    str = "";                    break;                default:                    str = "";                    break;            }            return str;        }    }}

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