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S7 F System : calculate response time

Created by: OmegaProjects at: 10/29/2010 2:12 PM (4 Replies)

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10/29/2010 2:12 PM	Rate (0)
OmegaProjects Silver Member Joined: 11/14/2008 Last visit: 5/6/2024 Posts: 504 Rating: (22)	Dear, I would like to know who to calculate the response time for a S7-400 H system. I looked to the S7timeb.xls file but couldn't find any cpu-to-cpu configuration which represents the S7-400H system ( redundancy). Thanks in advance, E. Yilmaz Attachment s7ftimeb.zip (412 Downloads)

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11/3/2010 12:47 PM	Rate (0)
OmegaProjects Silver Member Joined: 11/14/2008 Last visit: 5/6/2024 Posts: 504 Rating: (22)	For those who were interested in this question... ;) Attachment 23926783_as_fe_i_014_v20_en_s7fcotia.zip (542 Downloads)

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This contribution was helpful to 2 thankful Users dchartier hdhosseini

11/4/2010 12:22 AM	Rate (1)
fritz Diamond Expert Joined: 10/7/2005 Last visit: 11/16/2024 Posts: 3027 Rating: (1057)	Hello Eyup.Yilmaz just to avoid confusion, please be aware of the following: There aretwo kinds of Safety Systems available for S7's, one is called "Distributed Safety", the other one is "S7 F Systems". While both have commonalities they also have some important differences, all of which are best explained in chapter 1 of the Safety Engineering in Simatic S7 Manual(attached is the most important table from page 22 of this manual). Your original question relates to "S7ftimeb.xls" whichinfersusage of "S7 F Systems". The explanatory pdf in your second posthowever relates to "S7fcotib.xls" which infers usage of "Distributed Safety". Please be mindful of thisto avoid reaching the wrong conclusion (e.g. calculating an incorrect response time). I hope this helps Attachment Distributed Safety versus S7 F Systems.jpg (477 Downloads)
	Cheers fritz The advice and opinion given in this thread is that of the author and does not necessarily reflect the views of I S Systems Pty Limited. To find out how I S Systems can help you with your automation needs please visit www.issystems.com.au.
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This contribution was helpful to 1 thankful Users OmegaProjects

11/4/2010 8:14 AM	Rate (0)
OmegaProjects Silver Member Joined: 11/14/2008 Last visit: 5/6/2024 Posts: 504 Rating: (22)	Helo Fritz , Indeed your correct , the attachment that I've add with my post , has got to been used for a system where 'Distributed Safety' is used. (You can also see that in the first rule of the Excel-file). The reason why I added the attachment is that their are many similarities . Most of the parameters that are used in the file for 'Distributed Safety' are also used in the file for 'F-Systems'... My apologies if I have brought some confusion ... :s

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This contribution was helpful to 1 thankful Users fritz

11/5/2010 8:22 AM	Rate (0)
OmegaProjects Silver Member Joined: 11/14/2008 Last visit: 5/6/2024 Posts: 504 Rating: (22)	In the zipfile you can find a pdf where in chapter 16 (p.273) the cycle and response time is explained and also an example is given... The other image-file tell where you can let the response time calculate in Simatic Manager. Please correct me if I'm wrong :p Also made possible by dchartier E. Yilmaz Attachment MaxresponseTime.zip (467 Downloads)

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