Knowledge Base Nr: 00142 s7koppel.cpp - http://www.swe-kaiser.de

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Linux: S5/S7 Anbindung mit INAT-IP-Toolkit gekapselt in C++-Klasse

  
class  CItem
{
public:
  CItem();
  virtual ~CItem();

  CItem& operator= (const CItem& source);

  char    m_szName[200];
  char    m_szValue[200];
  long    m_lValue;
  bool    m_bIsGood;
  time_t  m_timestamp;
};

class CS7Koppel
{
public:
  CS7Koppel();
  ~CS7Koppel();

  int Connect(const char* szIPAddr, int nCPUNo);
  int Disconnect();

//citems lesen
  int ReadItem(CItem& cItem);
  int ReadItems(int nItemCount, CItem cItems[]);

  int WriteItem(CItem& cItem);
  int WriteItems(int nItemCount, CItem cItems[]);

//low level access
//wortweiser zugriff
  int ReadDB(int nDB, int nDW, unsigned short* nData);
  int WriteDB(int nDB, int nDW, unsigned short nData);

//byteweiser zugriff
  int ReadDI(int nByteAdr, unsigned short* nData);
  int WriteDO(int nByteAdr, unsigned short nData);

  int ReadM(int nByteAdr, unsigned short* nData);
  int WriteM(int nByteAdr, unsigned short nData);

protected:
...
};

//sample
extern "C" int main (int argc, char **argv)
{
  CS7Koppel s7;

  int nErr = 0;
  const char* lpszConnect = "153.95.169.172";

  nErr = s7.Connect(lpszConnect, 2);
LOG("MAIN: Connect(%s, 2) nErr=%d", lpszConnect, nErr);

LOG("MAIN: High Level Interface ************************\n");

  CItem item;
  CItem items[10];
  int nItemCount = 0;

  strcpy(item.m_szName, "DB3.0");
  items[nItemCount++] = item;
  nErr = s7.ReadItem(item);
LOG("MAIN: ReadItem(%s) : val:%04X isgood:%d nErr=%d", item.m_szName, item.m_lValue, item.m_bIsGood, nErr);

  strcpy(item.m_szName, "DI4.7");
  items[nItemCount++] = item;
  nErr = s7.ReadItem(item);
LOG("MAIN: ReadItem(%s) : val:%04X isgood:%d nErr=%d", item.m_szName, item.m_lValue, item.m_bIsGood, nErr);

  strcpy(item.m_szName, "DI4");
  items[nItemCount++] = item;
  nErr = s7.ReadItem(item);
LOG("MAIN: ReadItem(%s) : val:%04X isgood:%d nErr=%d", item.m_szName, item.m_lValue, item.m_bIsGood, nErr);

  strcpy(item.m_szName, "M0.1");
  items[nItemCount++] = item;
  nErr = s7.ReadItem(item);
LOG("MAIN: ReadItem(%s) : val:%04X isgood:%d nErr=%d", item.m_szName, item.m_lValue, item.m_bIsGood, nErr);

  strcpy(item.m_szName, "M0");
  items[nItemCount++] = item;
  nErr = s7.ReadItem(item);
LOG("MAIN: ReadItem(%s) : val:%04X isgood:%d nErr=%d", item.m_szName, item.m_lValue, item.m_bIsGood, nErr);

  nErr = s7.ReadItems(nItemCount, items);
LOG("MAIN: ReadItems(%d) : nErr=%d", nItemCount, nErr);
for (int n=0; n<nItemCount; n++)
LOG("MAIN:      name:%s val:%04X isgood:%d", items[n].m_szName, items[n].m_lValue, items[n].m_bIsGood);
...
}