最近做项目需要用MX读取三菱PLC，网上找了份编程文档，写了一个读取的工具类，批量和单独读取。
注意，MX读取PLC只能编译成32位的。贴一下自己写的简单工具类，记录一下。
导入的包：
写的代码:
using ActUtlTypeLib; using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace XXXX.Util { class MxCommuniUtil { private ActUtlType actUtlType = null; /// <summary> /// 是否打开连接 /// </summary> private bool _isOpen = false; private int stationNumber = 0; //我的连接默认0 public string message = null; private static MxCommuniUtil mxUtil; private MxCommuniUtil() { } public static MxCommuniUtil Instance() { if (mxUtil == null) { return new MxCommuniUtil(); } return mxUtil; } /// <summary> /// 第一步 打开PLC连接 /// </summary> /// <returns></returns> public bool Open() { lock (this) { try { if (_isOpen == true) { return true; } if (actUtlType == null) { actUtlType = new ActUtlType(); actUtlType.ActLogicalStationNumber = stationNumber; } int result = actUtlType.Open(); if (result != 0) { message = "PLC连接失败,错误代码：" + (uint)result; return false; } else { _isOpen = true; message = "PLC连接成功"; return true; } } catch (Exception ex) { _isOpen = false; message = "error:\n" + ex.Message; return false; } } } /// <summary> /// 软元件的批量读取->连续 (4 字节数据 ) /// </summary> public bool ReadDeviceBlock(string blockName, int size, out int[] lData) { lock (this) { lData = new int[size]; try { int result = actUtlType.ReadDeviceBlock(blockName, size, out lData[0]); if (0 == result) { message = "从PLC地址" + blockName + "开始读取" + size + "位成功"; return true; } else { message = "从PLC地址" + blockName + "开始读取" + size + "失败，错误代码：\n" + (uint)result; return false; } } catch (Exception ex) { _isOpen = false; message = "error:\n" + ex.Message; return false; } finally { Console.WriteLine(message); } } } /// <summary> /// 随机读取 /// </summary> /// <param name="szDevice"></param> /// <param name="size"></param> /// <param name="lData"></param> /// <returns></returns> public bool ReadDeviceRandom(string szDevice, int size, out int[] lData) { lock (this) { lData = new int[size]; try { int result = actUtlType.ReadDeviceRandom(szDevice, size, out lData[0]); if (0 == result) { message = "随即读取PLC地址" + szDevice + "\n" + size + "位成功"; return true; } else { message = "随即读取PLC地址" + szDevice + "\n" + size + "失败，错误代码：\n" + (uint)result; return false; } } catch (Exception ex) { _isOpen = false; message = "error:\n" + ex.Message; return false; } finally { Console.WriteLine(message); } } } /// <summary> /// 软元件的单个读取 (4 字节数据 ) /// </summary> /// <param name="device"></param> /// <param name="lData"></param> /// <returns></returns> public bool GetDevice(string device, out int lData) { lock (this) { try { int result = actUtlType.GetDevice(device, out lData); if (0 == result) { message = "PLC地址" + device + "读取成功,结果：" + lData; return true; } else { message = "PLC地址" + device + "读取失败，错误代码：" + (uint)result; return false; } } catch (Exception ex) { message = "error:\n" + ex.Message; lData = -1; return false; } finally { Console.WriteLine(message); } } } public bool SetDevice(string device, int lData) { try { int RCode = actUtlType.SetDevice(device, lData); if (0 == RCode) { message = "PLC地址" + device + "设置成功,结果：" + lData; return true; } else { message = "PLC地址" + device + "读取成功,结果：" + lData; return false; } } catch (Exception ex) { _isOpen = false; return false; } } public bool ClosePLC() { lock (this) { try { if (_isOpen == false) { return true; } int result = actUtlType.Close(); if (result != 0) { message = "PLC关闭失败,错误代码：" + (uint)result; return false; } else { _isOpen = false; message = "PLC关闭成功"; return true; } } catch (Exception ex) { _isOpen = true; message = "error:\n" + ex.Message; return false; } } } } }调用部分：
