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fix Issue #38: now read and write bytes handles address overflow correctly.

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Signed-off-by: Michele Cattafesta <michele.cattafesta@mesta-automation.com>
This commit is contained in:
Michele Cattafesta
2016-02-13 12:26:50 +01:00
parent 246f5a75dd
commit 9a790376ff
3 changed files with 55 additions and 4 deletions
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8
S7.Net/PLC.cs
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@@ -243,8 +243,9 @@ namespace S7.Net
package.Add(Types.Word.ToByteArray((ushort) (count)));
package.Add(Types.Word.ToByteArray((ushort) (DB)));
package.Add((byte) dataType);
package.Add((byte) 0);
switch (dataType)
var overflow = (int)(startByteAdr * 8 / 0xffffU); // handles words with address bigger than 8191
package.Add((byte)overflow);
switch (dataType)
{
case DataType.Timer:
case DataType.Counter:
@@ -552,7 +553,8 @@ namespace S7.Net
package.Add(Types.Word.ToByteArray((ushort)varCount));
package.Add(Types.Word.ToByteArray((ushort)(db)));
package.Add((byte)dataType);
package.Add((byte)0);
var overflow = (int) (startByteAdr*8/0xffffU); // handles words with address bigger than 8191
package.Add((byte)overflow);
package.Add(Types.Word.ToByteArray((ushort)(startByteAdr * 8)));
package.Add(new byte[] { 0, 4 });
package.Add(Types.Word.ToByteArray((ushort)(varCount * 8)));