Mitsubishi Electric FR-A720-0.4K Instruction Manual page 322

(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 cannot 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
Parameter Clear
For parameter clear and all parameter clear from the communication option or the parameter unit (FR-PU07), refer to the
instruction manual of each options. (Refer to page 396 for the operation panel, refer to page 342 for the Mitsubishi inverter protocol
with RS-485 terminal communication, and refer to page 355 for Modbus-RTU communication protocol.)
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
4
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