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unchained · 2023-03-28T14:19:24Z

Hi everyone, I am having trouble to keep values and parameters in the PLC's persistent Memory. I am using some persistent variables in my project. Persistent variables randomly returning to old values or sometimes initial values. Same goes with the COE Parameters, PLC is randomly going back to previous values and even defaulting the Startup COE parameters. Is there any solution for that problem?Thank you in advance. Cheers

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Persistent Memory and COE Parameters

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How-to & Troubleshooting

Last Post by AntVol1 1 year ago

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AntVol1

Feb 26, 2025 7:42 am

(@antvol1)

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Joined: 1 year ago

I recently stumbled upon a similar problem, losing PERSISTENT data after a power cycle. My IPC was equipped with a 1-second UPS and the solution was to use a UPS function call, according to your UPS and system type:

https://infosys.beckhoff.com/english.php?content=../content/1033/tcplclib_tc2_sups/3716524299.html&id=7162402166301276776

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