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S7 200 VW Memory backing up

3/12/2009 10:24 AM	Rate (0)
Indunil Posts: 33 Rating: (2)	Dear All, Can eny one help on this matter please: I need to save VW memory used in my S7 200 application. Because I need to keep my data entered via TD200 after power down of the plc. Thanks, Indunil.
Indunil Posts: 33 Rating: (2)
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3/12/2009 1:20 PM	Rate (0)
umencho Grandmaster Joined: 3/21/2006 Last visit: 10/16/2025 Posts: 10239 Rating: (1183)	Hello Deppends from S7-200 CPU look at Remanent data areas of the S7-22x or Retentive data area of the S7-21x regards

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3/15/2009 11:44 AM	Rate (0)
ramaslabas Posts: 20 Rating: (0)	I have had such problem. VW area is supported by super capacitor. This capacitor unloads in 5-7 days (or something like this). To keep retentive values is better to use M area. Of course, those possibilities are limited in size.
ramaslabas Posts: 20 Rating: (0)
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3/16/2009 11:11 AM	Rate (0)
Robster Platinum Member Joined: 5/28/2008 Last visit: 11/11/2025 Posts: 1344 Rating: (141)	You also can save data in memory cartridge with the receipe function.

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