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Analog Input 6ES7331-1KF02-0AB0 Pt100 resolution problem

8/1/2013 9:17 AM	Rate (0)
Winchester7 Experienced Member Joined: 7/19/2013 Last visit: 11/17/2025 Posts: 76 Rating: (5)	Helloo... I'm facing problem with Analog Input 6ES7331-1KF02-0AB0.. The problem is the value I got is very fluctuating / not stable when I connected a Pt100 sensor How can I reduce the resolution of this analog input or filter it, so I can get a smoother reading? Thank you

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8/1/2013 9:39 AM	Rate (0)
H-H Platinum Member Joined: 7/2/2008 Last visit: 12/21/2025 Posts: 929 Rating: (309)	Hellowinarko_song, I strongly recommend to check connection, cable shield and earthing. If you fail to get a stable reading after checking these three things, you can use a software solution. Please check these links Fluctuating Analogue Reading on HMI Input a filter on the analog input to reduce instability Advanced - adaptive smoothing filter software low-pass filter in STEP 7 V5.x Best regards. H-H
	Last edited by: H-H at: 8/1/2013 9:39 AM
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This contribution was helpful to 2 thankful Users Marcjan Ste39

8/14/2013 8:45 AM	Rate (0)
Winchester7 Experienced Member Joined: 7/19/2013 Last visit: 11/17/2025 Posts: 76 Rating: (5)	Thanks H-H, The software is working like a magic

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8/14/2013 9:12 AM	Rate (0)
Marcjan Diamond Member Joined: 4/22/2010 Last visit: 3/31/2025 Posts: 5697 Rating: (716)	H-H Hellowinarko_song, I strongly recommend to check connection, cable shield and earthing. Software might work for you, but it's hiding the problem. Problems you might run into again in the future, so i suggest you try to find the reason for this abnormal fluctuation of your PT100 reading. Regards, Marcjan
	Problem solved? Please let us know! Please no technical questions by PM, use the forum sections for your questions.
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8/14/2013 12:47 PM	Rate (0)
Winchester7 Experienced Member Joined: 7/19/2013 Last visit: 11/17/2025 Posts: 76 Rating: (5)	Hi Marcjan, I've checked all the connection,cable,and grounding, but it was still fluctuating before. So, I decide to use the software as my final solution. Thank you for your suggestion and support.

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This contribution was helpful to 1 thankful Users S_Moderator

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