Error in batch reading of bit data using S7MultiVar

[tzm2270969436]

Data writing using S7MultiVar is successful.However, the use of S7MultiVar for batch data reading does not match the actual situation.

 //DB1.DBX0.0
 var tag1 = new S7Consts.S7Tag
 {
     Area = (int)S7Area.DB,
     DBNumber = 1,
     Start = 0, // 0 * 8 + 0
     Elements = 1,
     WordLen = 1
 };
 //DB1.DBX0.2
 var tag2 = new S7Consts.S7Tag
 {
     Area = (int)S7Area.DB,
     DBNumber = 1,
     Start = 2,// 0 * 8 + 2
     Elements = 1,
     WordLen = 1
 };

 var writeBuffer = new byte[2] { 1, 1 };
 var writeMultivar = new S7MultiVar(s7Client);
 writeMultivar.Add(tag1, ref writeBuffer);
 writeMultivar.Add(tag2, ref writeBuffer, 1);
 //Write Ok
 writeMultivar.Write();

 var readBuffer = new byte[2];
 var readMultivar = new S7MultiVar(s7Client);
 readMultivar.Add(tag1, ref readBuffer);
 readMultivar.Add(tag2, ref readBuffer, 1);
 //Read Error,readBuffer [1,0]
 readMultivar.Read();

Sharp7 Document

When WordLen=S7WLBit the Offset (Start) must be expressed in bits.
Ex. The Start for DB4.DBX 10.3 is (10*8)+3 = 83.

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I attempted to modify the source code on line 1194 of the S7Client.cs file. After the modification, the bit reading was successful. However, I'm not sure if this will affect other data types.

Problem

The original code:

if (ItemSize % 2 != 0)

Solution

if (ItemSize % 2 != 0 && (S7ItemRead[1] != TS_ResBit))