1、根据寄存器状态来执行命令
创建Modbus客户端:
创建一个Modbus TCP客户端实例,并连接到Modbus服务器。读取寄存器状态:
异步读取Modbus寄存器状态。根据状态执行按钮操作:
根据读取到的寄存器状态来执行相应的按钮操作
2、程序
using System;
using System.Threading.Tasks;
using System.Windows.Forms;
using EasyModbus;
namespace ModbusTcpExample
{
public partial class MainForm : Form
{
private ModbusClient _modbusClient;
public MainForm()
{
InitializeComponent();
InitializeModbusClient();
}
private void InitializeModbusClient()
{
// 初始化Modbus客户端,指定Modbus服务器的IP地址
_modbusClient = new ModbusClient("192.168.0.100", 502);
// 尝试连接到Modbus服务器
try
{
_modbusClient.Connect();
MessageBox.Show("Connected to Modbus server.");
}
catch (Exception ex)
{
MessageBox.Show($"Failed to connect to Modbus server: {ex.Message}");
}
}
private async void CheckRegisterAndExecuteButtonOperationAsync()
{
try
{
// 异步读取寄存器状态
int registerValue = await Task.Run(() => _modbusClient.ReadHoldingRegisters(0, 1));
// 根据寄存器状态执行相应的按钮操作
if (registerValue == 1)
{
// 寄存器值为1时执行按钮操作
ExecuteButtonOperation();
}
else
{
// 寄存器值不为1时的处理
MessageBox.Show("Register value is not 1.");
}
}
catch (Exception ex)
{
MessageBox.Show($"Error reading register: {ex.Message}");
}
}
private void ExecuteButtonOperation()
{
// 在这里执行你的按钮操作
MessageBox.Show("Button operation executed based on register state.");
}
private async void myButton_Click(object sender, EventArgs e)
{
// 在按钮点击事件中调用异步方法
await CheckRegisterAndExecuteButtonOperationAsync();
}
private void MainForm_FormClosing(object sender, FormClosingEventArgs e)
{
// 关闭Modbus客户端连接
if (_modbusClient.IsConnected)
{
_modbusClient.Disconnect();
}
}
}
}