lj_plc/DataBlockHelper/PlcConnect.cs

using HslCommunication.Instrument.DLT;
using HslCommunication.Profinet.Siemens;
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Runtime.CompilerServices;
using System.Text;
using System.Threading.Tasks;


namespace DataBlockHelper
{
    public class PlcConnect
    {

        private static readonly Lazy<SiemensS7Net> lazy = new Lazy<SiemensS7Net>(() => new PlcConnect().SiemensS7NetConnection());
        public static SiemensS7Net Instance => lazy.Value;

        private PlcConnect()
        {

        }

        public SiemensS7Net SiemensS7NetConnection()
        {
            SiemensPLCS siemensPLCS = SiemensPLCS.S1500;
            SiemensS7Net s7 = new SiemensS7Net(siemensPLCS);
            s7.SetPersistentConnection();
            s7.IpAddress = "172.18.4.100";

            //s7.IpAddress = "192.168.1.110";
            s7.Port = 102;
            var su = s7.ConnectServer();

            if (!su.IsSuccess)
            {
                s7.IpAddress = "192.168.0.100";
                s7.Port = 7788;
                var fn = s7.ConnectServer();
                if (!fn.IsSuccess)
                {
                    return new SiemensS7Net(siemensPLCS);
                }
            }

            return s7;
        }
    }



}