public int GetOrderCode(S7OrderCode Code)
{
S7Szl SZL = new S7Szl(1024);
LastError = ReadSZL(0x0011, 0x0000, SZL);
if (LastError == 0)
{
Code.Update(SZL.Data, 0, SZL.DataSize);
}
return(LastError);
}
public int GetProtection(S7Protection Protection)
{
S7Szl SZL = new S7Szl(256);
LastError = ReadSZL(0x0232, 0x0004, SZL);
if (LastError == 0)
{
Protection.Update(SZL.Data);
}
return(LastError);
}
public int GetCpInfo(S7CpInfo Info)
{
S7Szl SZL = new S7Szl(1024);
LastError = ReadSZL(0x0131, 0x0001, SZL);
if (LastError == 0)
{
Info.Update(SZL.Data, 0);
}
return(LastError);
}
public int ReadSZL(int ID, int Index, S7Szl SZL)
{
int Length;
int DataSZL;
int Offset = 0;
Boolean Done = false;
Boolean First = true;
byte Seq_in = 0x00;
int Seq_out = 0x0000;
LastError = 0;
SZL.DataSize = 0;
do
{
if (First)
{
S7.SetWordAt(S7_SZL_FIRST, 11, ++Seq_out);
S7.SetWordAt(S7_SZL_FIRST, 29, ID);
S7.SetWordAt(S7_SZL_FIRST, 31, Index);
SendPacket(S7_SZL_FIRST);
}
else
{
S7.SetWordAt(S7_SZL_NEXT, 11, ++Seq_out);
PDU[24] = (byte)Seq_in;
SendPacket(S7_SZL_NEXT);
}
if (LastError != 0)
{
return(LastError);
}
Length = RecvIsoPacket();
if (LastError == 0)
{
if (First)
{
if (Length > 32) // the minimum expected
{
if ((S7.GetWordAt(PDU, 27) == 0) && (PDU[29] == (byte)0xFF))
{
// Gets Amount of this slice
DataSZL = S7.GetWordAt(PDU, 31) - 8; // Skips extra params (ID, Index ...)
Done = PDU[26] == 0x00;
Seq_in = (byte)PDU[24]; // Slice sequence
SZL.LENTHDR = S7.GetWordAt(PDU, 37);
SZL.N_DR = S7.GetWordAt(PDU, 39);
SZL.Copy(PDU, 41, Offset, DataSZL);
Offset += DataSZL;
SZL.DataSize += DataSZL;
}
else
{
LastError = errS7FunctionError;
}
}
else
{
LastError = errS7InvalidPDU;
}
}
else
{
if (Length > 32) // the minimum expected
{
if ((S7.GetWordAt(PDU, 27) == 0) && (PDU[29] == (byte)0xFF))
{
// Gets Amount of this slice
DataSZL = S7.GetWordAt(PDU, 31);
Done = PDU[26] == 0x00;
Seq_in = (byte)PDU[24]; // Slice sequence
SZL.Copy(PDU, 37, Offset, DataSZL);
Offset += DataSZL;
SZL.DataSize += DataSZL;
}
else
{
LastError = errS7FunctionError;
}
}
else
{
LastError = errS7InvalidPDU;
}
}
}
First = false;
}while (!Done && (LastError == 0));
return(LastError);
}