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Update PlcSynchronous.cs

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MaxPDUSize for WriteBytes
This commit is contained in:
Evgeniy
2019-07-03 13:04:33 +05:00
committed by GitHub
parent ea96891a31
commit 23796de8bf
1 changed files with 4 additions and 3 deletions
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7
S7.Net/PlcSynchronous.cs
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@@ -230,7 +230,7 @@ namespace S7.Net
//TODO: Figure out how to use MaxPDUSize here
//Snap7 seems to choke on PDU sizes above 256 even if snap7
//replies with bigger PDU size in connection setup.
var maxToWrite = Math.Min(count, 200);
var maxToWrite = Math.Min(count, MaxPDUSize - 28);//TODO tested only when the MaxPDUSize is 480
WriteBytesWithASingleRequest(dataType, db, startByteAdr + localIndex, value.Skip(localIndex).Take(maxToWrite).ToArray());
count -= maxToWrite;
localIndex += maxToWrite;
@@ -392,8 +392,9 @@ namespace S7.Net
int packageSize = 35 + value.Length;
ByteArray package = new ByteArray(packageSize);
package.Add(new byte[] { 3, 0, 0 });
package.Add((byte)packageSize);
package.Add(new byte[] { 3, 0 });
//complete package size
package.Add(Int.ToByteArray((short)packageSize));
package.Add(new byte[] { 2, 0xf0, 0x80, 0x32, 1, 0, 0 });
package.Add(Word.ToByteArray((ushort)(varCount - 1)));
package.Add(new byte[] { 0, 0x0e });