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9/14/2010 1:41 PM | |
Joined: 10/22/2008 Last visit: 9/19/2024 Posts: 369 Rating: (5) |
Where to find exact time of cpu instruction execution time? Also time of A/D convertion? Is it possible to get updated analog input value every 10 ms? Splitted from maximum closed loop PID on s7-300. |
Last edited by: O_Moderator at: 9/14/2010 2:07 PMnew subject after splitting |
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9/14/2010 5:35 PM | |
Joined: 9/27/2006 Last visit: 9/19/2024 Posts: 12282 Rating: (2684)
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So many questions, Oscar; Answers here are for S7-300 CPUs. If you are using another, please specify, or better still search for the appropriate manuals on the forum search box.
Look at the S7-300 CPUs instruction list: http://support.automation.siemens.com/WW/view/en/31977679
See the S7-300 Module data manual(look at the chapter on analog modules): http://support.automation.siemens.com/WW/view/en/8859629
Same manual: High Speed Analog Input Module 6ES7 331-7HF01-0AB0: basic coversion time per chanel is 52 micro second; the execution time of the module will vary depending on the filter time selected. To read at that speed you will also need to sue a cyclic OB set at 10 ms, which will task your processor. Make sure you test this before you implement this in your plant. Hope this helps, Daniel Chartier |
Last edited by: dchartier at: 9/14/2010 7:01 PM |
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