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Signal filtering PCS7

9/29/2007 1:36 PM	Rate (0)
hambar Posts: 12 Rating: (1)	Hi, The nubie is on the site to do the comisioning . But I have a problem. I must filter some signals thatI use. Some of them have a noise of 1-2% in maximum pick and itdriveme nuts. Can you tell me if there is a PSC7 block that does a low_pass filteringor maybe can I do it diferent . The problem is stresig becouse I use this in a PID loop and this loop is always acting on my valve. (related matter: does the pid block has an option to block the output at certain level if the PVarrived in a small proximity of the SP )
hambar Posts: 12 Rating: (1)
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9/29/2007 9:51 PM	Rate (0)
Nemo Posts: 3149 Rating: (172)	Hi perhaps you could use this formula / block... http://support.automation.siemens.com/WW/view/en/6170416 nemo
Nemo Posts: 3149 Rating: (172)
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10/1/2007 11:00 AM	Rate (0)
hambar Posts: 12 Rating: (1)	Hi Nemo, My engenering station is not here but I studied the function you had send me. I belive it will not help me becouse it only workswhen suplying ascending values. Ex: I can go from 0 to 20 from 50 to 80 etc, but if I want to go from 70 to 30 I do not belive I can do it. (or at least this is happening with the function INT_P that it states it implements 1/(Ts+1) where s is the Laplace transformation of the signal, and it resembles the one you had sent.) I will try it anyway the day after tomorow on site.
hambar Posts: 12 Rating: (1)
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10/2/2007 4:03 PM	Rate (1)
cabreytj Silver Member Joined: 5/18/2006 Last visit: 10/21/2020 Posts: 170 Rating: (66)	There is a PCS 7 block that does what you want. It's PT1_P, which is a 1st order lag block. cabreytj

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This contribution was helpful to 1 thankful Users tony-way

10/11/2007 10:50 AM	Rate (0)
hambar Posts: 12 Rating: (1)	it works. thanks
hambar Posts: 12 Rating: (1)
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1/22/2018 10:37 AM	Rate (0)
Jen_Moderator Diamond Member Joined: 6/19/2017 Last visit: 9/6/2024 Posts: 8171 Rating: (174)	New question published by 3 D J is split to a separate thread with the subject Can't find FB51 . Best regards Jen_Moderator

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