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Why does the LAC parameter not accept change on ATV312 drive?

ATV312 does not accept a change to the Access Level, parameter LAC.

Product line:
ATV312, Altivar 312


Customer is trying to adjust the Access Level from L1 to L3, but every time they push the Enter button the change does not hold.

In order to change the Access Level parameter LAC, push and hold the Enter button for 2sec, until the parameter flashes indicating it has saved.

To change Access Level from L3 back to L1, a factory reset will need to be completed.  
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