紧急求教 C#连接OPC 报错“值不在预期范围内” 谢谢！

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;

using OPCAutomation;

using System.Threading;



namespace OPCtestgulian

{

    public partial class Form1 : Form

    {

        OPCServer KepServer;

        OPCGroups KepGroups;

        OPCGroup KepGroup;

        OPCItems KepItems;

        OPCItem KepItem;

        public Form1()

        {

            InitializeComponent();

        }



        private void button1_Click(object sender, EventArgs e)

        {

            try

            {

                String serIp = "192.168.5.31";//服务器的IP地址

                String serverName = "BACHMANN.OPCStandardServer";//OPC服务器名称

                KepServer = new OPCServer();

                //连接OPC服务器,opc服务名,ip

                KepServer.Connect(serverName, serIp);

                //判断连接状态

                if (KepServer.ServerState == (int)OPCServerState.OPCRunning)

                {

                    textBox1.Text = "已连接到-" + KepServer.ServerName + "   ";

                }

                else

                {

                    //这里你可以根据返回的状态来自定义显示信息，请查看自动化接口API文档

                    textBox1.Text = "状态：" + KepServer.ServerState.ToString() + "   ";

                    return;

                }

                KepGroups = KepServer.OPCGroups;

                Thread t1; // 开1个线程用于读取数据

                t1 = new Thread(new ThreadStart(kepProcess));

                t1.Start();

            }catch(Exception ex){

                textBox1.Text = ex.Message;

            }

        }

        public void KepGroup_DataChange(int TransactionID, int NumItems, ref Array ClientHandles, ref Array ItemValues, ref Array Qualities, ref Array TimeStamps)

        {

            listBox1.Items.Add(ItemValues.GetValue(1));//取到改变的值

        }

        public void kepProcess()

        {

            KepGroup = KepGroups.Add("Group0");

            KepGroup.UpdateRate = 250;

            KepGroup.IsActive = true;

            KepGroup.IsSubscribed = true;



            //当KepGroup中数据发生改变的触发事件

            KepGroup.DataChange += new DIOPCGroupEvent_DataChangeEventHandler(KepGroup_DataChange);

            KepItems = KepGroup.OPCItems;

            int[] temp = new int[2];

            temp[0] = 0;

            KepItems.AddItem("Random Int1", 1);

            OPCItem bItem = KepItems.Item(1);

            Array serverHandles = (Array)temp;

            Array values;

            Array Errors;

            Object cancel;

            Object Qualities;

            KepGroup.SyncRead((short)OPCAutomation.OPCDataSource.OPCCache, serverHandles.Length, ref serverHandles, out values, out Errors, out Qualities, out cancel);

        }

        //关闭连接

        private void button2_Click(object sender, EventArgs e)

        {

            label6.Text = KepServer.CurrentTime.ToString();

            KepServer.Disconnect();//关闭连服务器



            textBox1.Text = "未连接 ";

        }



        private void Form1_Load(object sender, EventArgs e)

        {



        }

    }

}