/// <summary>
/// Converts from float to DWord (DBD)
/// </summary>
/// <param name="input"></param>
/// <returns></returns>
public static UInt32 ConvertToUInt(this float input)
{
uint output;
output = DWord.FromByteArray(Single.ToByteArray(input));
return(output);
}
/// <summary>
/// Given a S7 variable type (Bool, Word, DWord, etc.), it converts the bytes in the appropriate C# format.
/// </summary>
/// <param name="varType"></param>
/// <param name="bytes"></param>
/// <param name="varCount"></param>
/// <param name="bitAdr"></param>
/// <returns></returns>
private object ParseBytes(VarType varType, byte[] bytes, int varCount, byte bitAdr = 0)
{
if (bytes == null || bytes.Length == 0)
{
return(null);
}
switch (varType)
{
case VarType.Byte:
if (varCount == 1)
{
return(bytes[0]);
}
else
{
return(bytes);
}
case VarType.Word:
if (varCount == 1)
{
return(Word.FromByteArray(bytes));
}
else
{
return(Word.ToArray(bytes));
}
case VarType.Int:
if (varCount == 1)
{
return(Int.FromByteArray(bytes));
}
else
{
return(Int.ToArray(bytes));
}
case VarType.DWord:
if (varCount == 1)
{
return(DWord.FromByteArray(bytes));
}
else
{
return(DWord.ToArray(bytes));
}
case VarType.DInt:
if (varCount == 1)
{
return(DInt.FromByteArray(bytes));
}
else
{
return(DInt.ToArray(bytes));
}
case VarType.Real:
if (varCount == 1)
{
return(Types.Single.FromByteArray(bytes));
}
else
{
return(Types.Single.ToArray(bytes));
}
case VarType.String:
return(Types.String.FromByteArray(bytes));
case VarType.StringEx:
return(StringEx.FromByteArray(bytes));
case VarType.Timer:
if (varCount == 1)
{
return(Timer.FromByteArray(bytes));
}
else
{
return(Timer.ToArray(bytes));
}
case VarType.Counter:
if (varCount == 1)
{
return(Counter.FromByteArray(bytes));
}
else
{
return(Counter.ToArray(bytes));
}
case VarType.Bit:
if (varCount == 1)
{
if (bitAdr > 7)
{
return(null);
}
else
{
return(Bit.FromByte(bytes[0], bitAdr));
}
}
else
{
return(Bit.ToBitArray(bytes));
}
default:
return(null);
}
}
public bool WriteItems(Tag tag, object value)
{
lock (this)
{
try
{
if (!IsConnected())
{
return(false);
}
if (tag.TagType == "string") //在创建TagType时已经转为小写
{
var pLcAddress = DbAddress[tag.Address];
var strValue = value.ToString();
var strlen = (byte)strValue.Length;
var valueByte = new byte[strlen + 1];
var strbyte = Encoding.ASCII.GetBytes(strValue);
if (strbyte.Length != strlen)
{
throw new InvalidOperationException("写入" + tag.Address + "出错,解析的字符串长度与GetBytes数组长度不一致!");
}
if (strlen > pLcAddress.BitOffset)
{
throw new InvalidOperationException("写入" + tag.Address + "出错,输入的字符串的长度过长!");
}
valueByte[0] = strlen;
strbyte.CopyTo(valueByte, 1);
_plc.Write(DataType.DataBlock, pLcAddress.DBBlockID, pLcAddress.Offset + 1,
valueByte);
/*if (result != ErrorCode.NoError)
* throw new InvalidOperationException(result + "\n" + "Tag: " + tag.Address);*/
return(true);
}
//2020/6/11 ByteArray
if (tag.TagType == "bytearray") //在创建TagType时已经转为小写
{
var pLcAddress = DbAddress[tag.Address];
var strValue = value.ToString();
var strlen = strValue.Length;
var valueByte = new byte[strlen];
var strbyte = Encoding.ASCII.GetBytes(strValue);
if (strbyte.Length != strlen)
{
throw new InvalidOperationException("写入" + tag.Address + "出错,解析的字符串长度与GetBytes数组长度不一致!");
}
if (strlen != pLcAddress.BitOffset)
{
throw new InvalidOperationException("写入" + tag.Address + "出错,输入的字符串长度与定义长度不匹配!");
}
strbyte.CopyTo(valueByte, 0);
_plc.WriteBytes(DataType.DataBlock, pLcAddress.DBBlockID, pLcAddress.Offset,
valueByte);
/*if (result != ErrorCode.NoError)
* throw new InvalidOperationException(result + "\n" + "Tag: " + tag.Address);*/
return(true);
}
else
{
switch (value)
{
case double d:
{
var bytes = Double.ToByteArray(d);
value = DWord.FromByteArray(bytes);
break;
}
case bool b:
value = b ? 1 : 0;
break;
}
_plc.Write(tag.Address, value);
/*if (result != ErrorCode.NoError)
* throw new InvalidOperationException(result + "\n" + "Tag: " + tag.Address);*/
return(true);
}
}
catch (Exception ex)
{
//LOG.Error(string.Format("S7 Driver写入地址{0},值{1},出错{2}", tag.Address, value,ex));
Log.Error($"S7 Driver writes address:{tag.Address}, value:{value}, Message:{ex}");
return(false);
}
}
}