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Created by: rofon at: 6/8/2006 7:20 AM (7 Replies)

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6/8/2006 7:20 AM	Rate (0)
rofon Posts: 13 Rating: (0)	Hi All, Any idea how to make wincc internal tags hold the last value. So when wincc shutdown and running again the initial values not goto default or start value. Thanks.
rofon Posts: 13 Rating: (0)
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6/8/2006 8:42 AM	Rate (0)
Nemo Posts: 3149 Rating: (171)	Hi, I´d advice to use for this issue external variables in your S7-CPU But with ODK you can change the start values of your WinCC tags. Or you export your tags and reimport them.... nemo
Nemo Posts: 3149 Rating: (171)
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6/8/2006 1:41 PM	Rate (0)
Danielle Posts: 1275 Rating: (123)	I once looked up to try to make my internal tags' values retentive, and I found that WinCC doesn't have that feature. [:(] I made all my tags external, just as Nemo suggested you'd do. However, if someone downloads the DBs in the CPU, you could lose information. For that the tags are also stored in WinCC, and if the PLC loses the values the operador can send the values back to the PLC. Regards, Danielle
Danielle Posts: 1275 Rating: (123)
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6/8/2006 1:53 PM	Rate (0)
Salma Gold Member Joined: 9/27/2005 Last visit: 11/27/2007 Posts: 1398 Rating: (151)	As mentioned, WinCC does not support retentive tag values. For more information on the options presented by the other posters, please see http://support.automation.siemens.com/WW/view/en/22014563

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6/8/2006 5:53 PM	Rate (0)
Dec Gold Expert Joined: 5/19/2006 Last visit: 10/23/2024 Posts: 549 Rating: (107)	CC Mannheim solution sounds reasonable; BTW Probable they have a product “PM-HOWTOMAKEINTERNALTAGRETENTIVE” List price $1990.00 [:P]

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6/10/2006 8:20 AM	Rate (0)
rofon Posts: 13 Rating: (0)	Hi All, My solution using User Archive to save the values and restore the values when WinCC Startup and so far it's working well. Thanks & Regards.
rofon Posts: 13 Rating: (0)
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6/10/2006 9:02 AM	Rate (0)
stplanken Silver Member Joined: 3/4/2006 Last visit: 10/8/2024 Posts: 73 Rating: (3)	I found that using an external SQL server is the most reliable solution for me. Pro: very reliable, independent of PLC, independent of WinCC. Con: requires minor scripting to make it work.

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6/12/2006 10:24 AM	Rate (0)
Salma Gold Member Joined: 9/27/2005 Last visit: 11/27/2007 Posts: 1398 Rating: (151)	[quote user="Dec"] CC Mannheim solution sounds reasonable; BTW Probable they have a product “PM-HOWTOMAKEINTERNALTAGRETENTIVE” List price $1990.00 sounds cheap [:D]

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