User manual

IEC61131 User and Reference Manual
April 22, 2008
136
Information displayed in the Memory Usage section shows the memory usage by the IEC-
61131 program. For memory usage by a C/C++ program, refer to the C/C++ program map
file.
Flash Memory Section
Flash Used by IEC-61131 – The IEC-61131 application code is saved to flash when
downloaded to the controller. If the source code is embedded with the application, it is also
saved to flash.
Flash Remaining for IEC-61131 – Unused flash available to save the IEC-61131
application code. There is 1 MB of flash allotted for IEC-61131 application code.
Flash Used by C/C++ Program – The C/C++ application code is saved to flash when
downloaded to the controller. Refer to the C/C++ application map file for the size and
location of the code section that is saved to flash. There is 1 MB of flash allotted for C/C++
application code.
Non-Volatile Memory (SRAM) Section
SRAM Allocated by IEC-61131 – This memory includes SRAM allocated for all ISaGRAF
variables defined with the retained attribute.
SRAM Allocated by OS – This memory includes SRAM allocated by the OS for the
ISaGRAF function blocks dlogcnfg, flow, and total when these are used in the IEC-61131
application.