Memory Concept

[PLC70 0]

Hi friends, whenever i read specifications of a specific CPU i always confused by work memory and load memory. Can anybody explain these two Work memory and Load memory in easy words?

[IamJon 0]

Page 4: http://cache.automation.siemens.com/dnl/TQ/TQ2MTUxNwAA_7302326_FAQ/7302326_Speicherkonzepte_bei_SIMATIC_S7-300_e.pdf Basically WORK memory is what is used during runtime. Load memory is ROM and RAM that that holds the program. That's my interpretation anyway. Edited 28 Sep 2012 by IamJon

[PLC70 0]

Thanks alot. I have downloaded PDF from the link, mentioned in your post. I will read this document to clear the concept of work memory and load memory.

[PLC70 0]

My perception about work memory is taht it is cache used to keep intermediate results of calculations during program execution. Am i true please reply.

[IamJon 0]

That seems accurate enough. Why do you want to know this?

[PLC70 0]

To clear my concepts i want to know that because there so many people around me who are working on PLCs but they are not clear about work memory and load memory. Please also explain me main memory.