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save the diagnostic messages automatically via the HTML web of the PN CPU

Created by: Ribbie at: 5/21/2014 12:09 PM (5 Replies)

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5/21/2014 12:09 PM	Rate (0)
Ribbie Posts: 5 Rating: (0)	Hi, Is there also a possibility to save the diagnostic messages automatically via the HTML web of the PN CPU to a textfile or something similar?
Ribbie Posts: 5 Rating: (0)	Last edited by: O_Moderator at: 5/22/2014 9:43 AM new subject after splitting from /tf/WW/en/Posts/19115#top Last edited by: Ribbie at: 5/21/2014 12:12 PM
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5/22/2014 12:12 PM	Rate (1)
Aret Posts: 2348 Rating: (264)	Well, generally for logging you should use SCADA. This allows to analyze not only which errors came, but also when did they (for example with SCADA you can tell: on switching on motor you get error in diag buffer. Without SCADA it would be just error, unrelated to anything, it will be harder and longer to find out the reason). Do you want to make some HTML-parser to get values? I'm pretty sure it can be done, but looks weird.
Aret Posts: 2348 Rating: (264)
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This contribution was helpful to 1 thankful Users metwally mustafa

5/31/2014 8:25 PM	Rate (0)
Ashok Naphade Bronze Member Joined: 6/8/2013 Last visit: 10/28/2024 Posts: 158 Rating: (9)	Dear, I did't chech like this but I think it is not possible

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6/2/2014 1:24 PM	Rate (0)
Ribbie Posts: 5 Rating: (0)	The reason for this question is that the CPU sometimes get to the stop state. Cause of stop isunknown andwhat we want to find out. The processoperators can't wait for us to arrivebeforerestarting the PLC. The operators onsite take the power off and on again to get the CPUinrun.But after the power off thediagnostic buffer of the CPU is empty.The PCIwant to usefor logging is a Simatic Net 2008 CD (as OPC server andwithout HMI). That's whyI preferautomatically savethe logging from CPUtoPC.
Ribbie Posts: 5 Rating: (0)
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6/2/2014 2:34 PM	Rate (1)
H-H Platinum Member Joined: 7/2/2008 Last visit: 9/30/2024 Posts: 928 Rating: (309)	HelloRibbie, It's very strange that the CPU goes to STOP and goes to RUN again after a power cycle. Are you sure that CPU goes to STOP?! Do they see the STOP LED lit?! Maybe the do this to reset timers,counters and datablocks in the CPU to initate the plant/machine. I mean they know how to start something from the beginning and don't know how to solve problems when they happen specially in the absence of HMIs. Anyhow, these are the possibilities I will be thinking of if the CPU goes to STOP, 1- Programming error that happens in certain field conditions (OB121 is not there). 2- A software open loop exceeding the max. scan cycle time limit for 2 consecutive cycles (OB80 will help in just one cycle and in the 2snd cycle CPU will go to STOP). 3- Any external hardware error causing the CPU to STOP (Absence of all error OBs). My recommendation, 1- Install backup battery to save the diagnostic buffer. 2-Download all error OBs. 3- Revise your software. Best regards, H-H

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6/2/2014 3:29 PM	Rate (0)
MicroMan Platinum Member Joined: 11/29/2011 Last visit: 10/24/2024 Posts: 1360 Rating: (232)	Hi, The thing is that with Error OBs will keep the CPU running but it will not let you investigate the fault easily. What can be done easily, that you install all the Error OBs than you write a little code with SFC51 to read out diagnostic data when the CPU call the Error OB(the exact moment of the error) than you save the data into big shared DB in FIFO style. You can read these values on Wincc. After this point it is up to you VB skills what file format you export it. Happy to help further. Anyway good idea but in pratice... Csaba
	- What you read here, please check with manuals and your requirements. - Do not forget to Test, Test and Test... - If the post is helpful, please RATE it! MicroMan
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