三菱PLC上位机通信组件MX Component的使用

安装MX Component Version 4后，安装目录下 “ActSamples” 有官方示范代码。

然而自己折腾了两天才发现，内置方法只能对单字进行操作。

自己封装了int32双字的操作，以及Ascii字符串转ushort数组的方法。

建议配合MX工具集里面的“PLC Monitor Utility” 查看读写操作是否正确。

using ActUtlTypeLib;
using System;
using System.Globalization;
using System.Windows.Forms;

public class MX32 {
    private static ActUtlTypeClass act;
    public static int PlcStatus = -1;
    public static int MXRet = -99; //只有单步的返回值是准确的

    public static int[] ReadRandom(string[] dName) {
        string name2 = "";
        for (int i = 0; i < dName.Length; i++) {
            if (short.TryParse(dName[i].Substring(1, dName[i].Length - 1), out short sn) && sn % 2 == 0) {
                name2 += dName[i] + "
" + dName[i].Substring(0, 1) + (sn + 1).ToString() + "
";
            } else {
                //MessageBox.Show("元件名错误，或元件位号错吴！", "", MessageBoxButtons.OK, MessageBoxIcon.Error);
                return new int[] { };
            }
        }
        int[] tmp = new int[dName.Length * 2];
        MXRet = act.ReadDeviceRandom(name2.Trim(), dName.Length * 2, out tmp[0]);
        if (MXRet == 0) return int16To32(tmp);
        else return new int[] { };
    }

    public static int ReadRandom(string dName) {
        string name2 = "";
        if (short.TryParse(dName.Substring(1, dName.Length - 1), out short sn) && sn % 2 == 0) {
            name2 += dName + "
" + dName.Substring(0, 1) + (sn + 1).ToString();
        } else {
            //MessageBox.Show("元件名错误，或元件位号错吴！", "", MessageBoxButtons.OK, MessageBoxIcon.Error);
            return -99;
        }
        int[] tmp = new int[2];
        MXRet = act.ReadDeviceRandom(name2, 2, out tmp[0]);
        if (MXRet == 0) return int16To32(tmp)[0];
        else return -99;
    }

    public static bool WriteRandom(string dName, int dValue) {
        string name2 = "";
        if (short.TryParse(dName.Substring(1, dName.Length - 1), out short sn) && sn % 2 == 0) {
            name2 += dName + "
" + dName.Substring(0, 1) + (sn + 1).ToString();
        } else {
            //MessageBox.Show("元件名错误，或元件位号错吴！", "", MessageBoxButtons.OK, MessageBoxIcon.Error);
            return false;
        }
        int[] tmp = int32To16(new int[] { dValue });
        MXRet = act.WriteDeviceRandom(name2.Trim(), 2, ref tmp[0]);
        return MXRet == 0;
    }

    public static bool WriteRandom(string[] dName, int[] dValue) {
        string name2 = "";
        for (int i = 0; i < dName.Length; i++) {
            if (short.TryParse(dName[i].Substring(1, dName[i].Length - 1), out short sn) && sn % 2 == 0) {
                name2 += dName[i] + "
" + dName[i].Substring(0, 1) + (sn + 1).ToString() + "
";
            } else {
                //MessageBox.Show("元件名错误，或元件位号错吴！", "", MessageBoxButtons.OK, MessageBoxIcon.Error);
                return false;
            }
        }
        int[] tmp = int32To16(dValue);
        MXRet = act.WriteDeviceRandom(name2.Trim(), dValue.Length * 2, ref tmp[0]);
        return MXRet == 0;
    }

    public static int[] ReadBlock(string dName, int dataLen) {
        int[] tmp = new int[dataLen * 2];
        MXRet = act.ReadDeviceBlock(dName, dataLen * 2, out tmp[0]);
        if (MXRet == 0) return int16To32(tmp);
        else return new int[] { };
    }


    public static bool WriteBlock(string dName, int[] dValue) {
        int[] tmp = int32To16(dValue);
        MXRet = act.WriteDeviceBlock(dName, tmp.Length, ref tmp[0]);
        return MXRet == 0;
    }

    public static bool WriteBlockUShort(string dName, int[] sValue) {
        MXRet = act.WriteDeviceBlock(dName, sValue.Length, ref sValue[0]);
        return MXRet == 0;
    }


    public static void Open() {
        if (PlcStatus != 1) {
            act = new ActUtlTypeClass();
            act.ActLogicalStationNumber = DAL.PLCSN;
            act.ActPassword = DAL.PLCPSWD;
            int iret = -10;
            try {
                iret = act.Open();
            } catch {
                try {
                    act.Close();
                    iret = act.Open();
                } catch {
                    iret = -10;
                }
            }
            if (iret == 0) PlcStatus = 1; else PlcStatus = iret;
        }
    }

    public static void Exit() {
        if (PlcStatus == 1) {
            try {
                act.Close();
                act = null;
            } catch {
            }
        }
    }

    /// <summary>
    /// 将读取到的int16数组，每2个int16组合转换高低字节后,生成1个int32，写入数组
    /// </summary>
    /// <param name="in16"></param>
    /// <returns></returns>
    private static int[] int16To32(int[] in16) {
        int[] ret = new int[in16.Length / 2];
        for (int i = 0; i < in16.Length; i = i + 2)
            ret[i / 2] = int.Parse(string.Format("{0:X2}", in16[i + 1])
                + string.Format("{0:X2}", in16[i]), NumberStyles.HexNumber);
        return ret;
    }

    /// <summary>
    /// 将int32数组，每1个int32拆分成2个uint16
    /// </summary>
    /// <param name="in32"></param>
    /// <returns></returns>
    private static int[] int32To16(int[] in32) {
        int[] ret = new int[in32.Length * 2];
        for (int i = 0; i < in32.Length; i++) {
            string ins = string.Format("{0:X2}", in32[i]);
            if (in32[i] <= ushort.MaxValue) {
                ret[i * 2] = in32[i];
                ret[i * 2 + 1] = 0;
            } else {
                ret[i * 2] = int.Parse(ins.Substring(ins.Length - 4, 4), NumberStyles.HexNumber);
                ret[i * 2 + 1] = int.Parse(ins.Substring(0, ins.Length - 4), NumberStyles.HexNumber);
            }
        }
        return ret;
    }

    /// <summary>
    /// 将ASCII字符串转换成UShort数组(MX Component中,无ushort,代用int类型)
    /// </summary>
    /// <param name="str"></param>
    /// <returns></returns>
    public static int[] stringToInt(string str) {
        int k = str.Length / 2;
        int[] ret = new int[k + str.Length % 2];
        char[] cr = str.Trim().ToCharArray();
        for (int i = 0; i < k * 2; i = i + 2)
            ret[i / 2] =
                ushort.Parse(string.Format("{0:X2}", (int)cr[i + 1]) + string.Format("{0:X2}", (int)cr[i]), NumberStyles.HexNumber);
        if (str.Length % 2 > 0)
            ret[k + str.Length % 2 - 1] =
                ushort.Parse(string.Format("{0:X2}", (int)cr[str.Length - 1]), NumberStyles.HexNumber);
        return ret;
    }
}