Marius Golban

Hello Guys, I want to add some info specially regarding what kaare_t  say: PLC communicates with the host via SECS/GEM standards is  SEMI industries, the communication is done via PLC Bus and it has a driver QBFFUNC32.dll that is used by PPC.exe. The source code for PPC exe is in C, and has defined these functions for communication via BUS: QBF_Open - Opens the bus. QBF_Close - Closes the bus. QBF_X_In_Bit - Performs X 1- point input. QBF_X_In_Word - Reads X in word unit. QBF_X_In - Reads specified No. of bits from specified bit position of X. QBF_Y_Out_Bit - Performs 1- point output for Y. QBF_Y_Out_Word - Writes Y in word unit. QBF_Y_Out - Writes specified No. of bits from specified bit position of Y. QBF_Y_In_Bit - Inputs a Y point. Perform 1- point input for Y. QBF_Y_In_Word - Reads Y in word unit. QBF_Y_In - Reads the specified No. of bits from specified bit position of Y. QBF_ToBuf - Writes to buffer memory of intelligent functional module. QBF_FromBuf - Reads from buffer memory of intelligent functional module. QBF_UnitInfo - Reads the module configuration information. QBF_StartWDT - Sets the interval of the WDT and start up the WDT. QBF_ResetWDT - Reset the WDT. QBF_StopWDT - Stop the WDT. QBF_ReadStatus - Reads CONTECWinCPU module information (LED, error, etc). QBF_ReadStatusEx - Reads CONTECWinCPU module information (LED, error, link device refresh time etc) QBF_ControlLED - Control LED s on CONTECWinCPU module. QBF_Reset - Reset the bus. QBF_WaitEvent - Wait for event interrupt from programmable controller program ((P).GINT instruction). QBF_WaitUnitEvent - Wait for event interrupt from module. QBF_ControlProgram - Control execution of programmable controller program.   This is how the communication is done with Q50UDEHCPU processor.    

Hello, Well the PPC is the installed on the PC from Mitsubishi PLC RACK. Is used to communicate from PLC towards Host, and it has drivers for the BUS communication.  The PPC program is under C code, but is using PLC windows drivers.  

Hello,     I am working in microprocessor industries, now I am doing reverse engineering for PPC SECS communication program in Visual C++ 6.0 for Mitsubishi PLC(Model Q50UDEHCPU). Did anyone from you have worked with this program PPC? I need to find out the what are doing each function from this program? Like hostproc, data, mainproc, otherproc, plcproc, qbproc queue, offline, send_c, QBFFunc32.