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9/29/2010 4:39 PM | |
Joined: 1/28/2009 Last visit: 8/5/2024 Posts: 6844 Rating:
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Hi I want to know is there any SIEMENS block to do 2oo3 voting on analog values.One way is using median value of 3 values when no error in channels occured.Check the attachment from ELOPII HIMA. Best regards Attachment2oo3FINAL.zip (633 Downloads) |
Last edited by: hdhosseini at: 9/29/2010 4:39 PM |
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9/29/2010 5:39 PM | |
Joined: 9/27/2006 Last visit: 8/23/2024 Posts: 12279 Rating:
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Hello hdhosseini; From the manual Distributed I/O Devices, Fail-safe signal modules http://support.automation.siemens.com/WW/view/en/19026151 Sensor evaluation There are two types of sensor evaluation: ● → 1oo1 evaluation – sensor signal is read in once ● → 1oo2 evaluation - sensor signal is read twice by the same module and compared within the module or, in S7 F Systems, using F-block F_1oo2AI. ● → 2oo3 evaluation - sensor signal is compared in S7 F Systems using F-block F_2oo3AI. You can find more details in these Siemens manuals: SIMATIC Industrial Software S7 F/FH Systems - Configuring and Programming SIMATIC Industrial Software Safety Engineering in SIMATIC S7 For example: F_2oo3AI: 2oo3 evaluation of inputs of the REAL data type with discrepancy analysis Function This F-Block carries out a 2oo3 evaluation of REAL values using discrepancy analysis. If a REAL value is invalid, a 1oo2 evaluation is carried out. It calculates the mean value and the median or maximum and the minimum of inputs INx depending on inputs QBADx. Hope this helps, Daniel Chartier |
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9/29/2010 7:04 PM | |
Joined: 8/31/2005 Last visit: 8/20/2024 Posts: 2198 Rating:
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Have a look on chapter 5 in this document : http://support.automation.siemens.com/WW/view/en/25293475 |
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