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how to enable the battery backup?

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I have purchased two Jazz R16 PLCs, and trying to reprogramm them to my needs, the only problem I have got is that after I switch power off, all the data saved in the PLC is gone or restored to defaults.

Also while I am recompiling the programm and trying to download the program to PLC, I see the power up values - retain values grayed out.

What should I do to enable it?


I have opened the Jazz, and have seen the Letium battery on board, so I beleave it is good battery, also SB8 return a 0 value.


How can it be that the values does not been saved?

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