11/24/2017 9:33 PM | |
Joined: 9/27/2006 Last visit: 9/19/2024 Posts: 12282 Rating: (2684) |
Hello Fahim; From The Diagnostic Repeater manual: Diagnostic Repeater for PROFIBUS-DP First, a brief description of Profibus:frame errors 2.4 Statistics buffer For segments DP2 and DP3 the diagnostic repeater contains two statistics buffers in which information on the reflection error rate and message frame error rate is saved together with the date and time. The statistics buffers allow conclusions to be drawn about the quality of the bus system. Reflection errors occur, for example, when the signal is reflected by a disturbed or defective line. Message frame errors are detected, for example, when message frames with parity errors occur. Parity errors can be caused by a defective node, for example. The statistics buffers can be read out, displayed graphically, printed out, and exported as a CSV file by STEP 7. It is also possible in the user program to read out the statistics buffers from the diagnostic repeater as records and format them for visualization. A small number of frame errors is inevitable in a network, but if the number continues to increase or if the rate grows faster it will indicate a potential failure of the network. If you want to look at a more technical description I suggest you look at page 15 in this document, "Profibus data error checking": https://www.acromag.com/sites/default/files/Acromag_Intro_ProfibusDP_698A.pdf Below, you will find an extract of the Diagnostics Repeater's diagnostics section, on frame errors possible causes and corrections. Hope this helps, |
Last edited by: Jen_Moderator at: 11/27/2017 10:40:49 AMInserted right link. |
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