C#与三菱PLC通信详细使用(FX5U工控设备)

上一篇聊到了C#与三菱PLC设备任何通信，这篇详细介绍结合本人项目中的使用。包括32位数据寄存器的读取写入。

1.数据寄存器（如D100），数据寄存器直接使用32位即可

private void btn_ReadDeviceBlock_Click(object sender, EventArgs e)
        {
            int iReturnCode;
            short[] arrDeviceValue = new short[2]; // 表示 2个 寄存器软元件
            byte[] byarrBufferByte = new byte[4]; // 表示 4个 字节的数据
            byte[] byarr;
            try
            {
                String objText = ((Button)sender).Text;
                String[] sText = objText.Split('-');
                String szDevice = sText[0];
                Control col = this.groupBox1.Controls.Find(szDevice + "text", true)[0];
                TextBox textBox = (TextBox)col;
                iReturnCode = axActUtlType1.ReadDeviceBlock2(szDevice, 2, out arrDeviceValue[0]);

                for (int i = 0; i < 2; i++)
                {
                    byarr = BitConverter.GetBytes(arrDeviceValue[i]);
                    byarrBufferByte[i * 2] = byarr[0];
                    byarrBufferByte[i * 2 + 1] = byarr[1];
                }

                textBox.Text = BitConverter.ToInt32(byarrBufferByte, 0).ToString();
            }
            catch (Exception exception)
            {
                MessageBox.Show(exception.Message, Name,
                  MessageBoxButtons.OK, MessageBoxIcon.Error);
                return;
            }

            //The return code of the method is displayed by the hexadecimal.
            txt_ReturnCode.Text = String.Format("0x{0:x8}", iReturnCode);
        }

        private void btn_WriteDeviceBlock_Click(object sender, EventArgs e)
        {

            int iReturnCode;
            int iNumberOfData = 0;
            byte[] byarrBufferByte;
            short[] arrDeviceValue;
            try
            {
                String objText = ((Button)sender).Text;
                String[] sText = objText.Split('-');
                String szDevice = sText[0];
                Control col = this.groupBox1.Controls.Find(szDevice + "text", true)[0];
                TextBox textBox = (TextBox)col;
                if (!GetIntValue(textBox, out iNumberOfData))
                {
                    //If failed, this process is end.
                    return;
                }
                arrDeviceValue = new short[2];
                byarrBufferByte = BitConverter.GetBytes(iNumberOfData);
                arrDeviceValue[0] = BitConverter.ToInt16(byarrBufferByte, 0);
                arrDeviceValue[1] = BitConverter.ToInt16(byarrBufferByte, 2);
                iReturnCode = axActUtlType1.WriteDeviceBlock2(szDevice, 2, ref arrDeviceValue[0]);
            }
            catch (Exception exception)
            {
                MessageBox.Show(exception.Message, Name,
                  MessageBoxButtons.OK, MessageBoxIcon.Error);
                return;
            }

            //The return code of the method is displayed by the hexadecimal.
            txt_ReturnCode.Text = String.Format("0x{0:x8}", iReturnCode);
        }
        

2.内部继电器如（M10），内部继电器相当于一个开关0,1

#region "软元件1点的开启关闭设置" 如：M80
        private void btn_SetDeviceType_Click(object sender, EventArgs e)
        {
            int iReturnCode; //Return code
            try
            {
                String objText = ((Button)sender).Text;
                String[] sText = objText.Split('-');
                String szDevice = sText[0];
                String clickType = sText[1];
                if (clickType.Equals("ON"))
                {
                    iReturnCode = axActUtlType1.SetDevice(szDevice, 1);
                }
                else
                {
                    iReturnCode = axActUtlType1.SetDevice(szDevice, 0);
                }
            }
            catch (Exception exception)
            {
                MessageBox.Show(exception.Message, Name,
                  MessageBoxButtons.OK, MessageBoxIcon.Error);
                return;
            }

            //The return code of the method is displayed by the hexadecimal.
            txt_ReturnCode.Text = String.Format("0x{0:x8}", iReturnCode);
        }
        #endregion

3.监听继电器如（X0），监听要注意如果批量监听2个，就是2点方法的软元件点数要传2。

这个官方有Demo就不贴代码了。