Mitsubishi Electric FR-F740 EC Instruction Manual page 376

Misoperation prevention and parameter setting restriction
Password lock/unlock (Pr. 296, Pr. 297)
● Lock
Set parameter reading/writing restriction level (Pr. 296 ≠ 9999).
During Pr. 296 setting of any of "100 to 106 or 199", if password unlock error has occurred
5 times, correct password will not unlock the restriction. All parameter clear can unlock the
restriction.
(In this case, parameter settings are cleared.)
Write a four-digit number (1000 to 9998) in Pr. 297 as a password.
(When Pr. 296 = "9999", Pr. 297 cannot be written.)
When password is registered, parameter reading/writing is restricted with the restriction level
set in Pr. 296 until unlocking.
NOTES After registering a password, a read value of Pr. 297 is always one of "0" to "5".
When a password restricted parameter is read/written, "LOCD" is displayed.
Even if a password is registered, parameters which the inverter itself writes, such as inverter
parts life, are overwritten as needed.
Even if a password is registered, Pr. 991 "PU contrast adjustment" can be read/written when
a parameter unit (FR-PU04/FR-PU07) is connected.
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Pr. 296 Setting Value
0 to 6/99
100 to 106/199
Restriction of Password
Unlock Error
No restriction
Restricted at fifth error
Parameter
Pr. 297 Display
Always "0"
Displays error count (0 to 5)