/// <summary>
/// 设置扩展数字 I/O 的输出信号
/// </summary>
/// <param name="nCardNum"></param>
/// <param name="address">第几个扩展IO板</param>
/// <param name="doIndex">IO索引</param>
/// <param name="value">结果</param>
/// <returns></returns>
public override short SetExtendDoBit(short nCardNum, short address, short doIndex, short value)
{
short nRtn = 0;
var val = Convert.ToUInt16(value);
nRtn |= CMc.GT_SetExtIoValue(nCardNum, doIndex, val);
return(nRtn);
}