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what is the difference between @actual value and actual value at db online?

Created by: hazem at: 5/24/2011 4:51 PM (10 Replies)

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5/24/2011 4:51 PM	Rate (0)
hazem Bronze Member Joined: 2/15/2010 Last visit: 9/12/2021 Posts: 323 Rating: (6)	Dear, When i open DB online from simatic manager i can found the following : address Type initial value @acutal value actual value comments now i can find there is value at column @actual value and nothing at actual value why? Regards,
	Hazem
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5/24/2011 4:57 PM	Rate (0)
UMENCHO Diamond Member Joined: 3/21/2006 Last visit: 7/12/2023 Posts: 10221 Rating: (1177)	hazem .... i can find there is value at column @actual value and nothing at actual value why? ... Did you mean actual value comment? The comment aren't in CPU, the right words are CPU doens't care about comments. Best regards, Hristo Mihalev

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5/24/2011 5:24 PM	Rate (0)
hazem Bronze Member Joined: 2/15/2010 Last visit: 9/12/2021 Posts: 323 Rating: (6)	Dear, I mean values you can find real value @actual value column and nothing at actual value column and you can find @actual value colunm blue and other column gray? Shall you tell me what is the difference between both. Regards,
	Hazem
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5/24/2011 6:21 PM	Rate (0)
Marcjan Platinum Expert Joined: 4/22/2010 Last visit: 12/15/2022 Posts: 5697 Rating: (708)	Don't understand what you mean exactly Have a picture attached how it looks at my S7, could you explain what is the problem at your side. I see 2 collums off actual data, is the question about that? Best regards, Marcjan Attachment db.JPG (292 Downloads)
	Problem solved? Please let us know! Please no technical questions by PM, use the forum sections for your questions.
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5/24/2011 6:26 PM	Rate (0)
IBN-Service Posts: 8946 Rating: (997)	Marcjan ... I see 2 collums off actual data, is the question about that? ... Yes, that was his question. I ask it by myself also.... At online - status, only one collum is changing values, what is the reason for the other one?
IBN-Service Posts: 8946 Rating: (997)
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5/24/2011 7:31 PM	Rate (0)
Aret Posts: 2348 Rating: (262)	This is how i understand the subject: Imagine you create FB with some values. Then on generating DB for this FB you get Initial and Actual columns filled (with same values). Now you generated 10 such DBs for example. Now you parametrize each block with block-specific data (changing values inside block and pressing Save). Here your actual and initial columns begin to differ. After that you download all blocks to PLC. Inside PLC values in blocks could be overwritten by programm/VAT table/PG/HMI or something else. In this case you get @Actual value, that can differ from both Initial value and Actual value.
Aret Posts: 2348 Rating: (262)
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5/24/2011 7:32 PM	Rate (0)
Marcjan Platinum Expert Joined: 4/22/2010 Last visit: 12/15/2022 Posts: 5697 Rating: (708)	Ithink the white collum is the actual data witch wassaved last time you opend the block, the blue one is the actual data real time. have attached a picture, first part is before saving changes in db, second after, you can see differance at the manual value Best regards, Marcjan Attachment db2.JPG (264 Downloads)
	Last edited by: Marcjan at: 5/24/2011 7:37 PM Last edited by: Marcjan at: 5/24/2011 7:34 PM little to late but with picture Problem solved? Please let us know! Please no technical questions by PM, use the forum sections for your questions.
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This contribution was helpful to 1 thankful Users m.witekKBA

5/26/2011 11:04 AM	Rate (0)
hazem Bronze Member Joined: 2/15/2010 Last visit: 9/12/2021 Posts: 323 Rating: (6)	Dear, Thanks everybody who replied this issues. Regards,
	Hazem
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This contribution was helpful to 2 thankful Users Aret Marcjan

7/16/2013 6:25 PM	Rate (0)
Siem@nshb Posts: 6 Rating: (0)	Hi i am trying to modify the actual value on DB to 5 , i first change the initial value and after the actual value to 5, and when i download i get the value 5 in both in offline, but in online i get only the initial value changed the actual value didn t change , could you please help me
Siem@nshb Posts: 6 Rating: (0)
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7/16/2013 6:33 PM	Rate (0)
hdhosseini Diamond Expert Joined: 1/28/2009 Last visit: 9/25/2023 Posts: 6822 Rating: (1349)	Siem@nshb Hi i am trying to modify the actual value on DB to 5 , i first change the initial value and after the actual value to 5, and when i download i get the value 5 in both in offline, but in online i get only the initial value changed the actual value didn t change , could you please help me May be it is overwritten from logic.To find the "read" and "write' places use "go to location" capability in LAD/STL/FBD editor.Provide some snapshots if possible.
	Last edited by: hdhosseini at: 7/16/2013 6:34 PM Demo Channel on Youtube
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