Mitsubishi Electric FR-A720-00030-NA Instruction Manual page 330

(2) Password lock/unlock (Pr.296, Pr.297)
<Lock>
1) Set parameter reading/writing restriction level. (Pr. 296 9999)
Pr.296 Setting
0 to 6, 99
100 to 106, 199
* If password unlock error has occurred 5 times when Pr. 296 = "100 to 106, 199", correct password will not unlock the restriction. All parameter clear can
unlock the restriction.
(In this case, parameter setting are cleared.)
2) 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 set level in Pr. 296 until
unlocking.
REMARKS
 After registering a password, a read value of Pr. 297 is always "0" to "5".
 When a password restricted parameter is read/written,
 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.
<Unlock>
There are two ways of unlocking the password.
 Enter a password in Pr. 297.
Unlocked when a password is correct. If a password is incorrect, an error occurs and not unlocked.
If password unlock error has occurred 5 times when Pr. 296 = "100 to 106, 199", correct password will not unlock the
restriction. (During password lock)
 Perform all parameter clear.
CAUTION
 If the password has been forgotten, perform all parameter clear to unlock the parameter restriction. In that case, other
parameters are also cleared.
 All parameter clear can not be performed during the operation.
 Do not use FR Configurator under the conditions that parameter read is restricted (Pr. 296 = "0, 4, 5, 99, 100, 104, 105, 199").
FR Configurator may not function properly.
REMARKS
 The password unlock method is different for operation panel (FR-DU07)/FR-PU07, RS-485 communication, and communication
option.
All Parameter Clear
(Instruction Code H9966, H55AA)
Parameter Clear
(Instruction Code H9696, H5A5A)
Restriction of Password
Unlock Error
No restriction
Restricted at fifth error
FR-DU07/ RS-485
FR-PU07 Communication


: Password can be unlocked, : Password cannot be unlocked
Misoperation prevention and parameter
Pr.297 Display
Always 0
Displays error count
(0 to 5)
is displayed.
Communication
Option
 


setting restriction
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