ABB LWT300 Series User Manual page 48

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Figure 33 Accessing the write-protection screw
2 Using a suitable screwdriver, fully press down on the write-protection screw and turn 90° clockwise
to activate hardware write protection or, if already activated, 90° counterclockwise to deactivate it.
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Figure 34 Activating hardware write protection
Deactivated write
protection (default)
3 Put the nameplate back in place.
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User Guide
Nameplate
Write-protection screw
Activated write
protection