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Old March 25th, 2020, 12:42 AM   #1
ghriver
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5069-l306 memory retention time

anyone know about how long the compact logix 5069-l306 processor will hold its program in ram when the power is off. No battery light so im assuming it has a capacitor in it.
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Old March 25th, 2020, 06:44 AM   #2
Contr_Conn
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It does not hold program in RAM. Instead, it uses a capacitor to save RAM to NVRAM.
Once saved, it will remain in NVRAM for years.
It will restore program from NVRAM to RAM on power-up.
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Old March 25th, 2020, 07:15 PM   #3
ghriver
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is the NVRAM internal or is it the SD card. Thanks so much for your response, dont know how many manuals i went through to try and find this info.
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Old March 25th, 2020, 10:37 PM   #4
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Internal - the SD card is flash memory.
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