• Call to iobrd->oem_call (OEM programmer function) of each board with a required input scan (iobrd->inp_brd flag, set at init. for each input board).

Mainly, OEM programmer function reads input devices values and writes them into inputs database (iovar->data is used and directly handles on ISaGRAF database).

Input lock test must be taken into account by the OEM programmer

• Perform Conversion for not locked and non virtual analog inputs with conversion

Before conversion, input data base value is temporary incorrect

Even for real iovars, OEM programmer generally writes only integer values. Therefore, even if there is no conversion to be applied, an automatic conversion is performed to cast integers into real values. (If the OEM programmer writes a real value he must define the DEF_IOS_REAL option).

• Call to iovar->oem_call (OEM programmer function) of each not locked output to refresh (a list of outputs to refresh is built during the process evolution).

Mainly, OEM programmer function reads output data base value and writes it into the output device (iova ->data is used and directly handles on ISaGRAF database).

• Before the iovar->oem_call, conversions for analog outputs are performed. Therefore, during the oem_call, output data base value is temporary incorrect. Even for real iovars, OEM programmer generally reads only integer values. Therefore, even if there is no conversion to be applied, an automatic conversion is performed to cast real into integers values. (if oem programmer reads a real value he must define the DEF_IOS_REAL option).

• Call iobrd->oem_call (OEM programmer function) of each board with required board output refresh (iobrd->out_brd flag, reset at init.)

• OPERATE :
• TIC code ; Call to iovar->oem_call if not locked (in input or output)
• DEBUGGER - SERVER Option :

• Server Request;

  • In output refresh: Call to iovar->oem_call (even if locked and with conversion if necessary, just like output update)
  • Else Access to ISaGraf database (in read or write)