private const int READ_INTERVAL = 3000;//毫秒
/// <summary>
/// 连接
/// </summary>
/// <returns>1、成功；2、失败；3、非上位运行；4、存在警报；5、完成总数不为0；6、读取完成数失败；10、异常</returns>
public int Connect()
{
ShowInfo("开始连接...", Key);
int result = 0;
try
{
int rtn = axActUtlType.Open();
if (rtn == 0)
{
ShowInfo("连接成功！", Key);
result = 1;
}
else
{
Status = 2;
ShowInfo("连接失败!", Key);
result = 2;
return(result);
}
}
catch (Exception ex)
{
Status = 2;
ShowInfo(ex.Message, Key);
result = 10;
return(result);
}
if (result == 1)
{
//连接成功后，建立timer，发心跳包
SendHeartbeat();
//上位运行选择
int res = GetHostFlag();
if (res == 1)
{
//读报警
res = GetWarning();
if (res == 1)
{
//读完成总数
result = GetDoneCount();
}
}
result = res;
}
return(result);
}
private void btnConnect_Click(object sender, EventArgs e)
{
//Set the value of 'LogicalStationNumber' to the property.
//與Communication Setup Utility設定值相同
axActUtlType1.ActLogicalStationNumber = 1;
//Set the value of 'Password'.
//沒有密碼就給它空值
axActUtlType1.ActPassword = "";
//The Open method is executed.
//回傳值0等於成功
iReturnCode = axActUtlType1.Open();
labInfo.Text = (iReturnCode == 0) ? "連線PLC成功" : "連線PLC失敗";
}