Mitsubishi Electric FR-D720-008 Instruction Manual page 166

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)
Setting "1 to 6":
Setting "101 to 106":
* When Pr. 296 = "101 to 106", if password unlock error has occurred 5 times, correct password will not unlock the
restriction. Parameter all clear can unlock the restriction.
(In this case, parameter settings are cleared.)
2) Write four-digit numbers (1000 to 9998) in Pr. 297 as a password.
(When Pr. 296 = "9999", Pr. 297 can't 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
occasionally.
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.
During Pr. 296 = "101 to 106", if password unlock error has occurred 5 times, correct password will not unlock the restriction.
(During password lock)
Perform parameter all clear.
Password lock is unlocked. However, other parameter settings are cleared also.
NOTE
If the password has been forgotten, perform parameter all clear to unlock the parameter restriction. In that case,
other parameters are also cleared.
Parameter all clear can not be performed during operation of voltage output.
Do not use the FR Configurator under the conditions that parameter read is restricted (Pr. 296 = "4, 5, 104, 105").
FR Configurator may not function properly.
(3) Parameter operation during password lock/unlock
Parameter operation
Read
Pr. 296
Write
Read
Pr. 297
Write
Performing parameter clear
Performing parameter all clear
Performing parameter copy
∗1
Reading/writing is unavailable when there is restriction to reading by the Pr. 160 setting.
∗2
Unavailable during operation of voltage output.
∗3
Correct password will not unlock the restriction.
REMARKS
When Pr. 296 = "4, 5, 104, 105" and using the parameter unit (FR-PU04/FR-PU07), PUJOG operation is unavailable.
When writing is restricted from PU mode operation command (Pr. 296 = 1, 2, 4, 5, 101, 102, 104, 105), switching of operation
mode by easy setting mode is unavailable.
Parameters referred to
Pr. 77 Parameter write selection
Pr. 160 Extended function display selection
Pr. 551 PU mode operation command source selection
162
Does not display password unlock error count when reading Pr. 297 .
Displays password unlock error count when reading Pr. 297 .
Unlocked
Pr. 296 ≠ 9999
Pr. 296 = 9999
Pr. 297 = 9999 Pr. 297 = 9999
∗1
∗1
∗1
×
Refer to page 159
Refer to page 160
Refer to page 174
is displayed.
Password registered
Pr. 296 ≠ 9999
Pr. 297 = 0 to 4
(Read value)
∗1
×
×
∗2
×
Locked
Pr. 296 = 101 to 106
Pr. 297 = 5
(Read value)
×
∗3
×
∗2
×
: enabled, ×: restricted