Preventing Un-Authorised Parameter Editing - ABB ACS255 User Manual

10.8. Preventing un-authorized parameter editing.
This function can be used to prevent an un-authorized person from changing the drive parameter values; this function is disabled when
delivered from the factory.
Relevant Parameters
Parameter Access Unlock
1602
0...65535
Parameter Access code
1603
0...65535
Locking Parameter Access

Go to Parameter 1603 (Long Parameter group) and enter in your chosen parameter access code.

Press the
Parameter 1602 which will remain "Read Write".
Unlocking Parameter Access

Enter into Parameter 1602 the same value as 1603 (as chosen in "Locking Parameter Access" above).

All parameters will now be "Read Write" and parameter 1603 will become visible and show the value which was originally
programmed as the parameter access code.

To disable this feature set parameter 1603 PARAMETER ACCESS CODE to zero and then 1602 PARAMETER ACCESS UNLOCK to
zero.
button to exit and parameter 1603 will then be hidden and all parameters will be "Read only" (except for
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