10/18/2011 4:18 PM | |
Posts: 38 Rating: (1) |
Yes the encoders are attached with the shaft of the motors with the help of sprockets/chains and the profibus cable attached with the dp's is (28432m Siemens Simatic net profibus FC 6xV1 830-OEH10 22AWG shielded).Mostly the error occurs on these encoders whenever they are operational (whenever there is mechanical movement i-e, width adjustment with the help of motors feeded by MP370 touch). We have replaced old profibus cables of these encoders interconnecting them but no improvement.Please see the attached file. Regards AttachmentPLC.zip (108 Downloads) |
10/18/2011 4:54 PM | |
Joined: 9/27/2006 Last visit: 4/24/2024 Posts: 12257 Rating: (2665) |
Hello abra; Thereis more variety in Profibus cables offered by Siemens than simply the standard Profibus cable, and your selection should adapt to the specific needs of your project. Could it be that movement of your mahines stresses the Profibus cables and connectors in your plant? It might seem wise thento look into the different "flexible" or"trailing"cables described in the following link, from the Siemens Industry Mall:à https://eb.automation.siemens.com/goos/catalog/Pages/ProductData.aspx?nodeID=9300036&catalogRegion=WW&language=en&activetab=product®ionUrl=/#topAnch Hope this helps, Daniel Chartier |
10/19/2011 6:53 AM | |
Posts: 38 Rating: (1) |
The fault appears in the encoders only. Please see the attached diagnose buffer I have already recorded.Every time same type of buffer but different station number. Please advice. Regards AttachmentDiagnose.zip (147 Downloads) |
10/19/2011 2:43 PM | |
Posts: 38 Rating: (1) |
OB34 priority class 11 and execution time 100 and OB35 priority class 12 and execution time 40. I have increased execution time of Ob35 from 40 to 50 but no improvement.Please see the attachment for OB's and advice as all the software is in German
Attachment!_111.zip (126 Downloads) |
10/19/2011 6:12 PM | |
Posts: 38 Rating: (1) |
So should I increase scan time of OB34 and 35 but how much and how can I do phase offset between them? |
Last edited by: abrarfsd at: 10/19/2011 6:15 PM |
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