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What are the different file extensions & its use in Unity Pro.

This document describes the different types of Unity save files (use and content.)
 
             - STU : Working file used during development of the application. This is the most complete file (binary, source application and database are included). The application can be saved even if it is not “generated”.
 
             - STA : Archive file is used to send the application by email or to store on the PC. This file does not contain the database, so the STA is smaller than the STU file. When you open an archive file the database needs to be created again.  This is the reason why opening an STA file takes longer than opening an STU file. The archive file can only be created if the application has been generated. After you open an archive file, the application is in “generated” state so it is possible to connect to the PLC and directly modify the application without having to download the application.
This file is used to migrate your application from an older Unity version Vx to a newer Vx+1. *
 
            - STM : binary file contain only the executable, it can be uploaded from the PLC or downloaded using Unity Loader.it is not possible to display the application with this file.
 
             - XEF : Openness file in xml format. This file only contains the source code of the application. In a similar manner as the STA file, when you open an XEF file, the database has to be created but the application is not “generated”. A "rebuild all” and a complete download of the application is required.
This file does not contain the DTM source code.
 
             - ZEF :  contains the XEF and in addition the DTM configuration source code.
 
Content of the different files :
 
 
STU
STA
STM
XEF
ZEF
Inside PLC after download
Binary application
x
x
x
 
 
x
Source application
x
x
 
x
x
Option
Database
x
 
 
 
 
 
Animation table
x
x
 
x
x
Option
Operator screen
x
x
 
 
 
 
DTM configuration   (2)
x
x
x
 
x
x
CanOpen configuration
x
x
x
 
 
x
File size for a standard  application              
    10 Mb (1) 
 300Kb (1)  
   290Kb   
3Mb
  320Kb  (1)
 450Kb
Time to save
20 s
2 s
 
10 s
10s
 
Time to open
20 s
2mn30s
 
 2mn  
2mn
 
Connection with PLC
OK
OK
NOK   
   NOK (3)     
NOK (3)
 

(1) compressed file.
(2) the DTM must be installed on the PC
(3) need to rebuild the application and redownload it, for a application using CanOpen need to have also an export of these information and re-import them, for application using DTM : ZEF format has to be used.
x : included
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