/// <summary>
/// 获取功能码
/// </summary>
/// <param name="address"></param>
/// <returns></returns>
private static FnCode GetFnCode(string address)
{
var fcCode = address.Substring(0, 1);
FnCode temp = FnCode.None;
switch (fcCode)
{
case "I":
temp = FnCode.I;
break;
case "Q":
temp = FnCode.Q;
break;
case "M":
temp = FnCode.M;
break;
case "E": //DB块
temp = FnCode.DB;
break;
// case "S": //S代表字符串
// temp = DataType.String;
// break;
}
return(temp);
}
/// <summary>
/// 获取PLC地址信息
/// </summary>
/// <param name="addr"></param>
/// <returns></returns>
public static SiemensMessage GetAddress(string addr)
{
SiemensMessage msg = null;
string address = addr.ToUpper();
//地址不能为空，并且字符串长度不能少于2位
if (!string.IsNullOrEmpty(address) && address.Length > 2)
{
address = address.Replace("DBX", ""); // DB1.DBX0.0 => DB1.0.0
address = address.Replace("DB", "E"); // DB1.DBB0 => E1.EB0
address = address.Replace("DW", "L"); // MDW0 => ML0 IDW0 => IL0
var arr = address.Split('.'); //DB1.DBX0.0 M0.0 I0.0
int arrLength = arr.Length;
FnCode fnCode = GetFnCode(arr[0]); //获取功能码
DataType dataType = DataType.None;
int addressStart = 0;
int dbNumber = 0;
bool isByte = true;
if (arrLength == 1)
{ //IB0 QW0 MD0
dataType = GetDataType(arr[0]);
addressStart = GetAddressStart(arr[0]);
}
else if (arrLength == 2)
{ //I0.0 Q0.0 DB1.DBB0 DB1.DBB20
if (fnCode != FnCode.DB)
{
isByte = false;
dataType = DataType.Bit;
addressStart = GetBitStart(arr[0], arr[1]);
}
else
{
dataType = GetDataType(arr[1]);
addressStart = GetAddressStart(arr[1]);
dbNumber = GetDBNumber(arr[0]);
}
}
else if (arrLength == 3 && fnCode == FnCode.DB)
{ //DB1.0.0
isByte = false;
dbNumber = GetDBNumber(arr[0]);
addressStart = GetBitStart(arr[1], arr[2]); //有问题
dataType = DataType.Bit;
}
if (FnCode.None != fnCode && dataType != DataType.None && addressStart >= 0 && dbNumber >= 0)
{
msg = new SiemensMessage
{
FnCode = fnCode,
DbBlockNo = dbNumber,
DataType = dataType,
DataAddress = addressStart,
IsByte = isByte
};
}
}
return(msg);
}
