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Misoperation prevention and parameter setting restriction
(2) Password lock/unlock (Pr.296, Pr.297 )
<Lock>
1) Set parameter reading/writing restriction level. (Pr.296 9999)
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 level set in Pr.296 until
unlocking.
<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.
During [Pr.296 = any of "100 to 106"], if password unlock error has occurred 5 times, correct password will not unlock the
restriction. (During password lock)
Perform all parameter clear.
Pr.296 Setting
Value
Restriction of Password
Unlock Error
Pr.297 Display
0 to 6 No restriction Always 0
100 to 106 Restricted at fifth error Displays error count (0 to 5)
During [Pr.296 = any of "100 to 106"], 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.)
REMARKS
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, is displayed.
Even if a password is registered, parameters which the drive unit itself writes, such as drive unit 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-PU07) is
connected.
NOTE
If the password has been forgotten, perform all parameter clear to unlock the parameter restriction. In that case, other
parameters are also cleared.
Parameter all clear can not be performed during the operation.
REMARKS
The password unlock method is different for operation panel/FR-PU07, RS-485 communication, and communication option.
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 261 for the operation panel, refer to page 209 for the Mitsubishi inverter protocol
with RS-485 terminal communication, and refer to page 222 for Modbus-RTU communication protocol.)
Operation panel/
FR-PU07
RS-485
communication
Communication option
All parameter clear
Parameter clear
: Password can be unlocked., : Password cannot be unlocked.