/// <summary>
/// 获取单个输入点状态
/// ArgumentOutofRange
/// </summary>
/// <param name="index">输入点序号，从0开始</param>
/// <returns></returns>
public int GetAI(int index, out double volt)
{
if (index < 0 || index >= AICount)
{
throw new Exception(string.Format("GetAI(index = {0}, volt) index is out of range:0~{1}", index, AICount - 1));
}
volt = 0;
if (!IsOpen)
{
return((int)ErrorDef.NotOpen);
}
int opt = HTM.ReadAI(aiIndex[index], out volt);
if (opt != 0)
{
return((int)ErrorDef.InvokeFailed);
}
return((int)ErrorDef.Success);
}