7/6/2012 9:45 PM | |
Joined: 2/3/2011 Last visit: 9/5/2024 Posts: 348 Rating: (10) |
Hi, what´s the purpose of Battery(6es7291-8ba20-0xa0) and Memory(6es7291-8gh23-0xa0) Cartridge in S7-200. Thanks. |
7/6/2012 10:36 PM | |
Joined: 9/27/2006 Last visit: 9/25/2024 Posts: 12283 Rating: (2685) |
Hello syd_b; Whenever you need any basic information on the S7-200 family of CPUs, you should always start by consulting the S7-200 System Manual. You would be surprised at the amount of information you can find there: Understanding How the S7-200 Saves and Restores Data The S7-200 provides a variety of features to ensure that your user program and data are properly retained in the S7-200. - Retentive Data Memory -- Areas of data memory the user selects to remain unchanged over a power cycle, as long as the super capacitor and the optional battery cartridge have not been discharged. V, M, Timer Currents, and Counter Currents are the only data memory areas that are configurable to be retentive. - Permanent Memory -- Non-volatile memory used to store the program block, data block, system block, forced values, M memory configured to be saved on loss of power, and selected values written under user program control - Memory Cartridge -- Removable non-volatile memory used to store the program block, data block, system block, recipes, data logs, and forced valuesYou can use the S7-200 Explorer to store documentation files (doc, text, pdf, etc.) into the cartridge. You can also use the S7-200 Explorer to perform general file maintenance on the memory cartridge (copy, delete, directory and launch). For more details on the specs of the cartridges, have a look at the attached picture. It shows that the battery has an expected lif e of 200 days (the supercapacitor in the CPU dies after 50 hours). The memory cartridge is an EEPROM chip that maintains data without power. Hope this helps, Daniel Chartier |
Last edited by: dchartier at: 7/6/2012 10:47 PM |
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10/7/2014 1:24 PM | |
Posts: 7 Rating: (0) |
could we store the V,M memory into the optional carteidge thnx |
10/8/2014 4:09 PM | |
Joined: 1/21/2013 Last visit: 9/4/2024 Posts: 4620 Rating: (707) |
Hello alilazaal, Please read this thread: v and m memory and Retentive M memory that is saved ONLY in RAM |
1/11/2016 10:39 AM | |
Joined: 9/3/2014 Last visit: 3/13/2019 Posts: 4767 Rating: (123) |
New question published by plc doctor is split to a separate thread with the subject S7-200 PLC stop. Best regards |
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