4 03.04 Machine Operating Area4.5 MDI mode 4 Siemens AG, 2004. All rights reservedSINUMERIK 840D/840Di/810D Operator's Guide HMI Advanced (BAD) – 03.04 Edition 4-137MDI file fct. You can save the MDI buffer contents or copy a part program tothe MDI buffer for editing in MDI or Teach In.Vertical softkeysLike the Jog basic display, the MDI contains softkeys "GFct.+Transf.", "Auxiliary functions" and "Spindle" (if spindle isconfigured).Delete MDIbufferThe contents of the MDI program in the NC are erased.4.5.2 Save program, file functionFunctionYou can use the MDI file function to save the contents of the MDI program to a file or read a part program to the MDI buffer to modify it in MDI or TeachIn mode.Operating sequence"MDI" mode is selected in the "Machine" operating area.MDI filefunctionThe program overview of "Part programs" is opened,a dialog window also appears.The new file is then displayed in the program overview.Read inMDIThe program overview of part programs is displayed. From the list ofprograms select the one that you wish to copy to the MDI buffer with"Read in MDI". This can now be modified accordingly.Save MDIprog.The system will ask you to enter a name for the file to be saved to theMDI buffer.The program is saved/stored as a part program (MPF) under thename you have entered in the Part Programs directory.