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| 2/28/2013 11:01 AM | |
Joined: 9/23/2005 Last visit: 11/4/2024 Posts: 4351 Rating:
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Hi, A complete description of the memory concepts of S7-1500 could be found in the manual: Structure and use of the CPU memory http://support.automation.siemens.com/WW/view/en/59193101 Overview: In a free analogy, comparing a S7-1500 and a PC, the Work memory represents the PC’s RAM and the Load memory represents the PS’s hard disc drive / pen drives: Code Work memory (inside CPU – volatile - not expansible) -> where stay the programs blocks when the CPU is running Data Work memory (inside CPU – volatile - not expansible) -> where stays the DBs when the CPU is running Load Memory (inside the SIMATIC SD card – non volatile - different sizes could be used) – Where stays the program blocks, DB, HW configuration, etc. when the CPU stay turned off. Highlights: - The use of Memory Card with S7-1500 is mandatory. - Just SIMATIC Memory Card should be used (no “Standard” SD-Cards could be used). - S7-1500 can use the same Memory Card types as S7-1200. - If you “format” the SIMATIC Memory Card by Window, the card will be damage, and could not be “restored” by the user. - Commentaries are stored in Load memory (each character takes one byte). |
Last edited by: Pegaia at: 2/28/2013 11:32 AMDenilson Pegaia |
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