User Data

This zone contains the located and unlocated application data.

• located data:

  • %M, %S Boolean and %MW,%SW numerical data

  • data associated with modules (%I, %Q, %IW, %QW,%KW etc.)

• unlocated data:

  • Boolean and numerical data (instances)

  • EFB and DFB instances

User Program and Constants

This zone contains the executable codes and constants of the application.

• executable codes:

  • program code

  • code associated with EFs, EFBs and the management of I/O modules

  • code associated with DFBs

• constants:

  • KW constant words

  • constants associated with inputs/outputs

  • initial data values

This zone also contains the necessary information for downloading the application: graphic codes, symbols etc.

Other Information

Other information relating to the configuration and structure of the application are also stored in the memory (in a data or program zone depending on the type of information).

• Configuration: other data relating to the configuration (hardware configuration, software configuration).

• System: data used by the operating system (task stack, etc.).

• Diagnostics: information relating to process or system diagnostics, diagnostics buffer.