User manual

IEC61131 User and Reference Manual
April 22, 2008
137
SRAM Allocated by C/C++ Program – This memory includes SRAM allocated by a C/C++
application when the function allocateMemory() is called (e.g. the Flow Computer
application).
SRAM Remaining – Unused SRAM memory available to IEC-61131 and C/C++
applications. There is approximately 1 MB of SRAM allotted for the C/C++ and IEC-61131
applications.
Dynamic Memory (DRAM) Section
DRAM Used by IEC-61131 – This memory includes DRAM allocated for the IEC-61131
application code and data. Note that the IEC-61131 application code is loaded from flash
and executed from DRAM.
DRAM Remaining for IEC-61131 – Unused DRAM available to the IEC-61131 application.
There are 2 MB of DRAM allotted for the IEC-61131 application.
DRAM Used by C/C++ Program – The C/C++ application code is loaded from flash and
executed from DRAM. Refer to the C/C++ application map file for the size and location of the
code and data sections created in DRAM. There are 2 MB of DRAM allotted for C/C++
application code and data.
SCADAPack 330/334, SCADAPack 350 and SCADASense 4203
Controllers
When the controller type is set to SCADAPack 330/334, SCADAPack 350 or a
SCADASense 4203, the Program Status dialog displays the current state of the IEC-61131
program and all C\C++ programs loaded in controller. The state may be one of the following:
Stopped – program has been downloaded and is currently stopped.
Running – program has been downloaded and is currently running.
No Program – there is no program in the controller.
The Close button closes the dialog.
The memory used by each program is displayed in addition to the program state.
ROM – The values in this column describe the amount of memory used in ROM by each
program. This memory is used for program code.
RAM – The values in this column describe the amount of memory used in RAM by each
program. This memory is used for program data.
NVRAM – The values in this column describe the amount of memory used in non-volatile
RAM by each program. This memory is used by the ISaGRAF function blocks such as