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| 4/20/2011 12:25 PM | |
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Posts: 7 Rating:
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Hi guys
I wanna use PID controler in my project , my CPU is cpu315-2DP, max how many PID controler I can use with this cpu? and how? plz guide me thanks befor |
| 4/21/2011 3:10 AM | |
Joined: 9/27/2006 Last visit: 11/18/2024 Posts: 12294 Rating:
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Hello balouji; In S7-300 and S7-400 CPUs the integratedPID functions are FB41/42 and 43 (or SFB41/42/43). You will find a description of the functions as an attached file. So if you use these functions you must call one instance for every loop yopu create, plus the instance DB you will require. The number of loops you can run on a CPU will depend on the memory available, the ressources of the CPU and the requirements of the rest of your program. The highest number of concurrentloops we have run in our projects was 24, on a CPU 313C-2DP. It wa stouchy to have so many on such small ressources, but the CPU is still running the process well after almost 10 years... There are many threads and FAQson FB41 (Cont_C loop) in the forum just look for them using the search box at the right of the page here. This FAQ, for example, gives a formula to determine the memory requirements for a number of controllers (individual loops) in a S7 PLC: http://support.automation.siemens.com/WW/view/en/17624666Hope this helps, Daniel Chartier AttachmentS7pidcoa_enl.pdf (804 Downloads) |
Last edited by: dchartier at: 4/21/2011 3:16 AM |
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This contribution was helpful to
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| 4/22/2011 9:48 AM | |
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Posts: 7 Rating:
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Hi dear dchartier thank you very much for your perfect repply appreciate |
| 2/17/2012 3:36 PM | |
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Posts: 7 Rating:
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Hi.... i want suggest my Multi Parameters set implementation.... plese see:http://blog.ranghetto.com/?p=13 Best Regards
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