.NET的PLC帮助类

 TCP和UDP协议：

        TCP（传输控制协议）和UDP（用户数据报协议）是TCP/IP协议簇中的两种核心协议。它们在传输层上提供数据传输服务，但具有不同的特性和功能。

        TCP协议是一种提供可靠、面向连接的字节流服务的传输协议。在数据传输前，发送方和接收方必须先建立TCP连接，然后才能进行数据传输。它通过超时重发、丢弃重复数据、数据检验等功能，确保数据能从一端传输到另一端。

        UDP协议则是一种简单的面向数据报的传输层协议，它提供的是非面向连接、不可靠的数据流传输服务。由于UDP在传输数据报前不需要在客户和服务器之间建立连接，也没有超时重发等机制，因此其传输速度相对较快。但这也意味着它不能提供数据传输的可靠性保障。

        总的来说，TCP和UDP各有其优点和使用场景。TCP主要应用于可靠性要求高的应用，如网页浏览、文件传输等；而UDP则更适合于可靠性要求低、对传输速度和经济性有一定需求的应用，如视频流、游戏等。

RS-232和RS-475通信接口标准及Modbus协议：

        RS-232是一种常见的串行通信接口标准，由美国电子工业协会（EIA）联合贝尔系统公司、调制解调器厂家及计算机终端生产厂家于1970年共同制定。其全名为“数据终端设备(DTE)和数据通信设备(DCE)之间串行二进制数据交换接口技术标准”。它通常被应用于计算机、调制解调器和各种电子设备之间的通信连接。

        RS-475是一种由美国电子工业协会（EIA）制定的半双工通信接口标准，它通常被应用于电子设备之间的数据传输。它采用平衡驱动和差分接收，因此具有较好的抗干扰能力，同时传输距离较远，可以达到数百米甚至千米级别。与RS-232不同的是，RS-475通常采用9针D型连接器，并且其引脚定义也与RS-232有所不同。RS-475主要用于工业、科学和医疗等领域的设备间通信，但由于其半双工的限制，应用场景不如RS-232和RS-485广泛。

        Modbus是一种串行通信协议，最初由Modicon公司（现在的施耐德电气 Schneider Electric）于1979年开发，用于可编程逻辑控制器（PLC）之间的通信。此协议已经成为工业领域通信协议的业界标准，并且现在是工业电子设备之间常用的连接方式。西门子的S1200和S1500用的就是Modbus协议

        Modbus协议定义了一个控制器能够识别的消息结构，不管它们是经过何种网络进行通信的。它描述了控制器请求访问其他设备的过程，如果回应来自其他设备的请求，以及怎样侦测错误并记录。它制定了消息域格局和内容的公共格式。当在Modbus网络上通信时，此协议决定了每个控制器需要知道它们的设备地址，识别按地址发来的消息，决定要产生何种行动。如果需要回应，控制器将生成反馈信息并用Modbus协议发出。总的来说，Modbus是一种应用于电子控制器之间的通用语言，通过它，不同厂商生产的控制设备可以连成工业网络，进行集中监控。

一、使用HslCommunication程序集，官网：胡工科技。

using Newtonsoft.Json.Linq;
using System;
using System.Collections.Generic;
using System.Net;
using System.Threading;
using HslCommunication;
using HslCommunication.Profinet.Siemens;
using HslCommunication.Profinet.Omron;
using HslCommunication.Profinet.Keyence;namespace PLC.Class
{public class PLCHelper{#region 连接西门子PLC--SiemensS7Net/// <summary>/// 连接西门子PLC--SiemensS7Net/// </summary>/// <param name="siemens"></param>/// <param name="ip">IP地址</param>/// <param name="port">端口</param>/// <returns></returns>private bool ConnectSiemens(SiemensS7Net siemens, string ip, int port){try{IPAddress ipaddress;bool flag = !IPAddress.TryParse(ip, out ipaddress);if (flag){return false;}else{siemens.IpAddress = ip;siemens.Port = port;OperateResult operateResult = siemens.ConnectServer();bool isSuccess = operateResult.IsSuccess;if (isSuccess){return true;}else{return false;}}}catch (Exception){return false;}}/// <summary>/// 给西门子PLC点位写信号/// </summary>/// <param name="siemens"></param>/// <param name="ip">IP地址</param>/// <param name="port">端口</param>/// <param name="point">PLC点位</param>/// <param name="flag">给点位传入的值</param>/// <returns></returns>public bool WriteFlagBySiemens(SiemensS7Net siemens, string ip, int port, string point, short flag){if (ConnectSiemens(siemens, ip, port)){OperateResult result = siemens.Write(point, flag);siemens.ConnectClose();return result.IsSuccess;}else{return false;}}/// <summary>/// 读取西门子PLC的状态/// </summary>/// <param name="siemens"></param>/// <param name="ip">IP地址</param>/// <param name="port">端口</param>/// <param name="point">PLC点位</param>/// <returns></returns>public bool ReadBoolBySiemens(SiemensS7Net siemens, string ip, int port, string point){if (ConnectSiemens(siemens, ip, port)){OperateResult<bool> value = siemens.ReadBool(point);siemens.ConnectClose();return value.Content;}else{return false;}}/// <summary>/// 读取西门子PLC的值/// </summary>/// <param name="siemens"></param>/// <param name="ip">IP地址</param>/// <param name="port">端口</param>/// <param name="point">PLC点位</param>/// <param name="length">读取长度</param>/// <returns></returns>public string ReadStringBySiemens(SiemensS7Net siemens, string ip, int port, string point, ushort length){if (ConnectSiemens(siemens, ip, port)){OperateResult<string> result = new OperateResult<string>();result = siemens.ReadString(point, length);string source = string.Empty;if (!string.IsNullOrEmpty(result.Content)){source = result.Content;}else{for (int i = 0; i < 3; i++){Thread.Sleep(10);result = siemens.ReadString(point, length);if (!string.IsNullOrEmpty(result.Content)){source = result.Content;break;}}if (string.IsNullOrEmpty(result.Content)){return "未读取到PLC信息";}}siemens.ConnectClose();return source;}else{return "false";}}/// <summary>/// 清空西门子PLC点位中的值/// </summary>/// <param name="siemens"></param>/// <param name="ip"></param>/// <param name="port"></param>/// <param name="point"></param>/// <param name="length">写入的长度</param>/// <returns></returns>public bool ClearPlcPocketBySiemens(SiemensS7Net siemens, string ip, int port, string point, int length, string flag = " "){if (ConnectSiemens(siemens, ip, port)){OperateResult result = siemens.Write(point, flag, length);siemens.ConnectClose();return result.IsSuccess;}else{return false;}}#endregion#region 连接欧姆龙PLC--OmronFinsNet/// <summary>/// 连接欧姆龙PLC--OmronFinsNet/// </summary>/// <param name="omron"></param>/// <param name="ip"></param>/// <param name="port"></param>/// <returns></returns>private bool ConnectOmron(OmronFinsNet omron, string ip, int port){//OmronFinsUdptry{IPAddress ipaddress;bool flag = !IPAddress.TryParse(ip, out ipaddress);if (flag){return false;}else{omron.IpAddress = ip;omron.Port = port;omron.SA1 = 239;//if (ip240.Contains(ip))//{//    omron.SA1 = 240;//}//else//{//    omron.SA1 = 239;//}//omron.DA1 = 24;OperateResult operateResult = omron.ConnectServer();if (!operateResult.IsSuccess){for (int i = 0;i < 3;i++){operateResult = omron.ConnectServer();if (operateResult.IsSuccess){break;//return true;}}//SA1使用239连接不上，则采取240连接if (!operateResult.IsSuccess){omron.SA1 = 240;for (int i = 0; i < 3; i++){operateResult = omron.ConnectServer();if (operateResult.IsSuccess){break;//return true;}}}//if (!isSuccess)//{//    return false;//}}return operateResult.IsSuccess;}}catch (Exception ex){LogHelper.WriteErrLog(ex.ToString());return false;}}/// <summary>/// 给欧姆龙PLC点位写信号/// </summary>/// <param name="siemens"></param>/// <param name="ip">IP地址</param>/// <param name="port">端口</param>/// <param name="point">PLC点位</param>/// <param name="flag">给点位传入的值</param>/// <returns></returns>public bool WriteShortByOmron(OmronFinsNet omron, string ip, int port, string point, short flag){//if (ConnectOmron(omron, ip, port))//{OperateResult result = omron.Write(point, flag);if (!result.IsSuccess){for (int i = 0;i < 3;i++){result = omron.Write(point,flag);if (result.IsSuccess){break;//return true;}}//if (!result.IsSuccess)//{//    return false;//}}//omron.ConnectClose();return result.IsSuccess;//}//else//{//    return false;//}}//写入float值public bool WriteFloatByOmron(OmronFinsNet omron, string ip, int port, string point, float flag){//if (ConnectOmron(omron, ip, port))//{OperateResult result = omron.Write(point, flag);if (!result.IsSuccess){for (int i = 0; i < 3; i++){result = omron.Write(point, flag);if (result.IsSuccess){break;//return true;}}//if (!result.IsSuccess)//{//    return false;//}}//omron.ConnectClose();return result.IsSuccess;//}//else//{//    return false;//}}public string WritePointByOmron(OmronFinsNet omron, string ip, int port, List<string> pointlst, List<string> dataTypelst, List<string> valuelst,string type,List<string> filedlst){//int sucNum = 0;string errorFileds = "";try{if (type == "EDIT"){//return 0;return "";}//调用时以下6个点位不写入List<string> addNotWritePoint = new List<string>() { "D200", "D202", "D210", "D212", "D0", "D469" };if (ConnectOmron(omron, ip, port)){for (int i = 0; i < pointlst.Count; i++){if (addNotWritePoint.Contains(pointlst[i])){continue;}if (dataTypelst[i] == "FLOAT" && !string.IsNullOrEmpty(valuelst[i])){float flag = Convert.ToSingle(valuelst[i]);bool result = WriteFloatByOmron(omron, ip, port, pointlst[i], flag);if (result){//sucNum++;}else{if (errorFileds.Length > 0){errorFileds += ",";}errorFileds += filedlst[i];LogHelper.WriteErrLog($"IP:{ip},端口:{port},点位:{pointlst[i]},值:{valuelst[i]}写入失败！");}}else if (dataTypelst[i] == "SHORT" && !string.IsNullOrEmpty(valuelst[i])){short flag = Convert.ToInt16(valuelst[i]);bool result = WriteShortByOmron(omron, ip, port, pointlst[i], flag);if (result){//sucNum++;}else{if (errorFileds.Length > 0){errorFileds += ",";}errorFileds += filedlst[i];LogHelper.WriteErrLog($"IP:{ip},端口:{port},点位:{pointlst[i]},值:{valuelst[i]}写入失败！");}}}//return sucNum;}//else//{//    return sucNum;//}}catch (Exception ex){LogHelper.WriteErrLog(ex.ToString());}finally{omron.ConnectClose();}//return sucNum;return errorFileds;}/// <summary>/// 读取欧姆龙PLC的状态/// </summary>/// <param name="siemens"></param>/// <param name="ip">IP地址</param>/// <param name="port">端口</param>/// <param name="point">PLC点位</param>/// <returns></returns>public bool ReadBoolByOmron1(OmronFinsNet omron, string ip, int port, string point){if (ConnectOmron(omron, ip, port)){OperateResult<bool> value = omron.ReadBool(point);omron.ConnectClose();return value.Content;}else{return false;}}//读取float型数据public float ReadFloatByOmron(OmronFinsNet omron, string ip, int port, string point){//if (ConnectOmron(omron, ip, port))//{OperateResult<float> value = omron.ReadFloat(point);if (!value.IsSuccess){for (int i = 0;i < 3;i++){value = omron.ReadFloat(point);if (value.IsSuccess){break;//return value.Content;}}//if (!value.IsSuccess)//{//    return 0;//}}//omron.ConnectClose();if (value.IsSuccess){return value.Content;}else{return 0;}//}//else//{//    return 0;//}}//读取short型数据public short ReadShortByOmron(OmronFinsNet omron, string ip, int port, string point){//if (ConnectOmron(omron, ip, port))//{OperateResult<short> value = omron.ReadInt16(point);if (!value.IsSuccess){for (int i = 0; i < 3; i++){value = omron.ReadInt16(point);if (value.IsSuccess){break;//return value.Content;}}//if (!value.IsSuccess)//{//    return 0;//}}//omron.ConnectClose();if (value.IsSuccess){return value.Content;}else{return 0;}//}//else//{//    return 0;//}}//读取Bool类型数据public bool ReadBoolByOmron(OmronFinsNet omron, string ip, int port, string point){OperateResult<bool> value = omron.ReadBool(point);if (!value.IsSuccess){for (int i = 0; i < 3; i++){value = omron.ReadBool(point);if (value.IsSuccess){break;}}}if (value.IsSuccess){return value.Content;}else{return false;}}public string ReadPointByOmron(OmronFinsNet omron, string ip, int port, List<string> filedlst, List<string> pointlst, List<string> datatypelst){string result = "0";JObject jObj = new JObject();try{if (ConnectOmron(omron, ip, port)){for (int i = 0; i < pointlst.Count; i++){if (datatypelst[i] == "FLOAT"){result = ReadFloatByOmron(omron, ip, port, pointlst[i]).ToString();}else if (datatypelst[i] == "SHORT"){result = ReadShortByOmron(omron, ip, port, pointlst[i]).ToString();}else if (datatypelst[i] == "BOOL" && pointlst[i] == "H10"){//涂布单双面3个点位细分—00：单面，01：双面，01；02：连续bool res = false;List<string> H10s = new List<string>() { "H10.00", "H10.01", "H10.02" };foreach (string h10 in H10s){res = ReadBoolByOmron(omron, ip, port, h10);if (res){result = h10.Substring(h10.Length - 1,1);break;}}}jObj.Add(new JProperty(filedlst[i], result));}}}catch (Exception ex){LogHelper.WriteErrLog(ex.ToString());}finally{omron.ConnectClose();}return jObj.ToString();}/// <summary>/// 读取欧姆龙PLC的值/// </summary>/// <param name="siemens"></param>/// <param name="ip">IP地址</param>/// <param name="port">端口</param>/// <param name="point">PLC点位</param>/// <param name="length">读取长度</param>/// <returns></returns>public string ReadStringByOmron(OmronFinsNet omron, string ip, int port, string point, ushort length){if (ConnectOmron(omron, ip, port)){OperateResult<string> result = new OperateResult<string>();result = omron.ReadString(point, length);string source = string.Empty;if (!string.IsNullOrEmpty(result.Content)){source = result.Content;}else{for (int i = 0; i < 3; i++){Thread.Sleep(10);result = omron.ReadString(point, length);if (!string.IsNullOrEmpty(result.Content)){source = result.Content;break;}}if (string.IsNullOrEmpty(result.Content)){return "未读取到PLC信息";}}omron.ConnectClose();return source;}else{return "false";}}/// <summary>/// 清空欧姆龙PLC点位中的值/// </summary>/// <param name="siemens"></param>/// <param name="ip"></param>/// <param name="port"></param>/// <param name="point"></param>/// <param name="length">写入的长度</param>/// <returns></returns>public bool ClearPlcPocketByOmron(OmronFinsNet omron, string ip, int port, string point, int length, string flag = " "){if (ConnectOmron(omron, ip, port)){OperateResult result = omron.Write(point, flag, length);omron.ConnectClose();return result.IsSuccess;}else{return false;}}#endregion#region  连接基恩士PLC--KeyenceMcNet/// <summary>/// 连接基恩士PLC--KeyenceMcNet/// </summary>/// <param name="omron"></param>/// <param name="ip"></param>/// <param name="port"></param>/// <returns></returns>private bool ConnectKeyence(KeyenceMcNet keyence, string ip, int port){try{IPAddress ipaddress;bool flag = !IPAddress.TryParse(ip, out ipaddress);if (flag){return false;}else{keyence.IpAddress = ip;keyence.Port = port;OperateResult operateResult = keyence.ConnectServer();bool isSuccess = operateResult.IsSuccess;if (isSuccess){return true;}else{return false;}}}catch (Exception){return false;}}/// <summary>/// 给基恩士PLC点位写信号/// </summary>/// <param name="siemens"></param>/// <param name="ip">IP地址</param>/// <param name="port">端口</param>/// <param name="point">PLC点位</param>/// <param name="flag">给点位传入的值</param>/// <returns></returns>public bool WriteFlagByKeyence(KeyenceMcNet keyence, string ip, int port, string point, short flag){if (ConnectKeyence(keyence, ip, port)){OperateResult result = keyence.Write(point, flag);keyence.ConnectClose();return result.IsSuccess;}else{return false;}}/// <summary>/// 读取基恩士PLC的状态/// </summary>/// <param name="siemens"></param>/// <param name="ip">IP地址</param>/// <param name="port">端口</param>/// <param name="point">PLC点位</param>/// <returns></returns>public bool ReadBoolByKeyence(KeyenceMcNet keyence, string ip, int port, string point){if (ConnectKeyence(keyence, ip, port)){OperateResult<bool> value = keyence.ReadBool(point);keyence.ConnectClose();return value.Content;}else{return false;}}/// <summary>/// 读取基恩士PLC的值/// </summary>/// <param name="siemens"></param>/// <param name="ip">IP地址</param>/// <param name="port">端口</param>/// <param name="point">PLC点位</param>/// <param name="length">读取长度</param>/// <returns></returns>public string ReadStringByKeyence(KeyenceMcNet keyence, string ip, int port, string point, ushort length){if (ConnectKeyence(keyence, ip, port)){OperateResult<string> result = new OperateResult<string>();result = keyence.ReadString(point, length);string source = string.Empty;if (!string.IsNullOrEmpty(result.Content)){source = result.Content;}else{for (int i = 0; i < 3; i++){Thread.Sleep(10);result = keyence.ReadString(point, length);if (!string.IsNullOrEmpty(result.Content)){source = result.Content;break;}}if (string.IsNullOrEmpty(result.Content)){return "未读取到PLC信息";}}keyence.ConnectClose();return source;}else{return "false";}}/// <summary>/// 清空基恩士PLC点位中的值/// </summary>/// <param name="siemens"></param>/// <param name="ip"></param>/// <param name="port"></param>/// <param name="point"></param>/// <param name="length">写入的长度</param>/// <returns></returns>public bool ClearPlcPocketByKeyence(KeyenceMcNet keyence, string ip, int port, string point, int length, string flag = " "){if (ConnectKeyence(keyence, ip, port)){OperateResult result = keyence.Write(point, flag, length);keyence.ConnectClose();return result.IsSuccess;}else{return false;}}#endregion}
}