前言
本文介绍了如何使用三菱提供的MX Component插件实现对三菱PLC软元件数据的读写,记录了使用计算机仿真,模拟PLC,直至完成测试的详细流程,并重点介绍了在这个过程中的易错点,供参考。
用到的软件:
- PLC开发编程环境GX Works2,GX Works2下载链接 https://www.mitsubishielectric-fa.cn/site/file-software-detail?id=18
2.实现计算机与可编程控制器通信的软件工具MX Component,MX Component下载链接 https://www.mitsubishielectric-fa.cn/site/file-software-detail?id=27
配置流程:
1.GX Works2的配置流程:
(1)新建工程,选择PLC型号;
(2)修改PLC参数,PLC文件设置=>使用一下文件=>命名,设置合适的容量大小,扩容为了后期测试时使用(该操作可选);
(3)修改软元件设置,使用上一步骤中的扩容操作,三菱PLC设计上位机数据操作区一般选择D区,R区和W区亦可(该操作可选);
(4)调试中选择=>模拟开始,出现Simulator窗口,Mode和RUN绿灯长亮即表示仿真正常;
2.MX Component配置流程:
(1)找到MX Component安装的对应软件,选择"Communication Setup Utility",以管理员身份运行;
(2)添加Logical Station Number(通道号);(这里以99为例)
(3)由于本案例采用的是GX Works2仿真方案,选择GX Simulator2,选择CPU型号,下一步即可;
(4)选择描述,,以Test为例;
(5)配置完成后,进行测试,显示successful表示连接成功;连接成功后可以关掉该软件,不影响正常通讯;
3.C#上位机的程序测试:
using ActUtlTypeLib;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace MELSEC.MX.Test
{
public partial class Form1 : Form
{
private ActUtlType m_plc;
public Form1()
{
InitializeComponent();
m_plc = new ActUtlType();
}
private void Form1_Load(object sender, EventArgs e)
{
cmb_LogicalStationNumber.Items.Clear();
for (int i = 1;i<=256;i++)
{
cmb_LogicalStationNumber.Items.Add(i.ToString());
}
}
private void btn_Comm_Click(object sender, EventArgs e)
{
try
{
int logNUM = Convert.ToInt16(cmb_LogicalStationNumber.Text);
m_plc.ActLogicalStationNumber=logNUM;
m_plc.ActPassword = "";
if (m_plc.Open() != 0)
{
btn_Comm.BackColor = Color.Gray;
btn_Comm.Text = "未建立链接";
m_plc.Close();
m_plc = null;
}
else
{
btn_Comm.BackColor = Color.Green;
btn_Comm.Text = "已连接";
}
}
catch (Exception )
{
throw;
}
}
private void btn_Read_Click(object sender, EventArgs e)
{
try
{
Thread thread = new Thread(() =>
{
while (true)
{
txb_D0.Invoke(new Action(() =>
{
txb_D0.Text = ReadDeviceValue("D0", 2)[0].ToString();
txb_D1.Text = ReadDeviceValue("D0", 2)[1].ToString();
txb_R100.Text = ReadDeviceValue("R100", 1)[0].ToString();
txb_W500.Text = ReadDeviceValue("W500", 1)[0].ToString();
}));
Thread.Sleep(300);
}
});
thread.IsBackground = true;
thread.Start();
}
catch (Exception)
{
throw;
}
}
private string[] ReadDeviceValue(string DeviceName,int NumberOfData)
{
int iReturnCode;
short[] arrDeviceValue;
string szDeviceName;
string[] arrData= { };
int iNumberOfData;
try
{
szDeviceName = string.Join("\n", DeviceName);
iNumberOfData = Convert.ToInt32(NumberOfData);
arrDeviceValue = new short[iNumberOfData];
iReturnCode = m_plc.ReadDeviceBlock2(szDeviceName, iNumberOfData, out arrDeviceValue[0]);
if (iReturnCode == 0)
{
arrData = new string[iNumberOfData];
for (int i = 0; i < iNumberOfData; i++)
{
arrData[i] = arrDeviceValue[i].ToString();
}
return arrData;
}
return arrData;
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, Name, MessageBoxButtons.OK, MessageBoxIcon.Error);
return arrData;
}
}
}
}
Demo演示