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Misoperation prevention and parameter
setting restriction
4.22.5 Password function (Pr. 296, Pr. 297)
(1) Parameter reading/writing restriction level (Pr. 296)
Level of reading/writing restriction by PU/NET operation mode operation command can be selected by Pr. 296.
Registering a 4-digit password can restrict parameter reading/writing.
Parameter
Number
Name Initial Value Setting Range Description
296 *2
Password lock level 9999
0 to 6, 99, 100 to
106, 199
Select restriction level of parameter reading/
writing when a password is registered.
9999 No password lock
297
*2
Password lock/unlock 9999
1000 to 9998 Register a 4-digit password
(0 to 5) *1
Displays password unlock error count.
(Reading only) (Valid when Pr. 296 = "100"
to "106", "199")
9999
*1 No password lock
The above parameters can be set when Pr. 160 User group read selection = "0".
When Pr. 296 ≠ "9999" (with password lock), note that Pr. 297 is always available for setting regardless of Pr. 160 setting.
*1 Only Pr.297 can be set anytime as Pr.297 = "0 or 9999." However, the setting is invalid (the displayed value does not change).
*2 This parameter allows its setting to be changed during operation in any operation mode even if "0 (initial value) or 1" is set in Pr. 77 Parameter
write selection.
...............Specifications differ according to the date assembled. Refer to page 484 to check the SERIAL number.
Pr. 296 Setting
PU Operation Mode Operation
Command
*3
NET Operation Mode Operation Command *4
RS-485 Terminals Communication Option
Read *1 Write *2 Read Write *2 Read Write *2
9999
0, 100 *6
××××××
1, 101 × × ×
2, 102
×
3, 103
× ×
4, 104
×××× ×
5, 105
××
6, 106
×× ×
99, 199
Only parameters registered in the user group can be read/written.
*5
(For the parameters not registered in the user group, same restriction level as "4, 104" applies.)
: enabled, ×: restricted
*1 If the parameter reading is restricted by the Pr. 160 setting, those parameters are unavailable for reading even when "" is indicated.
*2 If the parameter writing is restricted by the Pr. 77 setting, those parameters are unavailable for writing even when "" is indicated.
*3 This restricts parameter access from the command source that can write a parameter under the PU operation mode (initially the operation panel
(FR-DU07) or the parameter unit). (For how to select the PU mode command source, refer to page 322.)
*4 This restricts parameter access from the command source that can write a parameter under the Network operation mode (initially the RS-485
terminals or a communication option). (For how to select the NET mode command source, refer to page 322.)
*5 Read/write is enabled only in the simple mode parameters registered in the user group when Pr.160 User group read selection = "9999".
Pr.296 and Pr.297 are always read/write enabled whether registered to a user group or not.
*6 If a communication option is installed, option fault (E.OPT) occurs, and inverter trips. (Refer to page 412.)