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s7 v11 pid loop

Created by: asdsaad at: 6/11/2011 11:09 AM (5 Replies)

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6/11/2011 11:09 AM	Rate (0)
asdsaad Posts: 11 Rating: (0)	hi friends, i want to make pid loop with s7 v11, that i have cpu 312 with rtd in with analog output cards. regards abdul
asdsaad Posts: 11 Rating: (0)
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6/11/2011 12:29 PM	Rate (1)
IBN-Service Posts: 8946 Rating: (989)	asdsaad hi friends, i want to make pid loop with s7 v11, that i have cpu 312 with rtd in with analog output cards. regards abdul OK, I think you can do it! Have fun!
IBN-Service Posts: 8946 Rating: (989)
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This contribution was helpful to 1 thankful Users MM1234

6/11/2011 2:33 PM	Rate (0)
billwest Posts: 510 Rating: (113)	FB41/SFB41 are still available billwest
billwest Posts: 510 Rating: (113)
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6/11/2011 4:34 PM	Rate (0)
hdhosseini Diamond Expert Joined: 1/28/2009 Last visit: 2/23/2021 Posts: 6713 Rating: (1290)	Also check this: https://www.automation.siemens.com/tf/WW/en/Posts/57636 Regards
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6/13/2011 9:41 AM	Rate (1)
Tomy Master Gold Member Joined: 5/4/2009 Last visit: 3/3/2021 Posts: 895 Rating: (40)	Hi, I think that SFB41 is not really available in CPU312. Regards. Tomy.
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This contribution was helpful to 1 thankful Users UMENCHO

6/14/2011 12:53 PM	Rate (0)
Denilson Pegaia Platinum Expert Joined: 9/23/2005 Last visit: 3/3/2021 Posts: 3902 Rating: (1160)	Hi, you can use the FB41 that is similar to SFB41. Pay attention: (S)FB41 reads PV as real or word, but as word it spected a scale from 0 to 27648. When you use RTD, the analog value comes in degrees and not in the scale 0 - 27648. Work arraound: first convert the RTD value to real, multiply for 10 (or 100) to match the scale and use the real value in PV_IN input.
	Denilson Pegaia Siemens Industry Sector Technical Support
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This contribution was helpful to 1 thankful Users Tomy Master

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