Mitsubishi Electric 800 Series Instruction Manual page 172

 Registering a password (Pr.296, Pr.297)
• The following section describes how to register a password.
1.
Set the parameter reading/writing restriction level. (Pr.296  "9999")
Pr.296 setting
0 to 6, 99 No restriction
*1 Restricted at fifth error
100 to 106, 199
*1 During Pr.296 = any of "100 to 106, 199", 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, the parameters are returned to their initial values.)
2.
Write a four-digit number (1000 to 9998) in Pr.297 as a password. (Writing is disabled when Pr.296="9999".) When
a password is registered, parameter reading/writing is restricted with the restriction level set in Pr.296 until
unlocking.
NOTE
• After registering a password, the read value of Pr.297 is always one of "0 to 5".
• A password restricted parameter cannot be read/written.
• Even if a password is registered, the parameters, which the inverter itself writes, such as inverter parts life are overwritten
as needed.
• Even if a password is registered, reading/writing is enabled for Pr.991 PU contrast adjustment when the operation panel
or the parameter unit (FR-PU07) is connected.
 Unlocking a password (Pr.296, Pr.297)
• There are two ways of unlocking the password.
• Enter the password in Pr.297. If the password matches, it unlocks. If the password does not match, an error occurs and
the password does not unlock. When any of "100 to 106, or 199" is set in Pr.296 and a password unlock error occurs five
times, the restriction will not be unlocked even if the correct password is subsequently input. (Password lock in operation.)
• Perform all parameter clear.
NOTE
• If the password is forgotten, it can be unlocked with all parameter clear, but doing so will also clear the other parameters.
• All parameter clear cannot be performed during the operation.
• When using FR Configurator2 in the PU operation mode, do not set "0, 4, 5, 99, 100, 104, 105, or 199" (parameter read is
disabled) in Pr.296. Doing so may cause abnormal operation.
• The password unlocking method differs between the operation panel, parameter unit, RS-485 communication and
communication option.
Operation panel/parameter

All parameter clear

Parameter clear
: Password can be unlocked, : Password cannot be unlocked
• For the parameter clear and parameter all clear methods for the communication option and parameter unit, refer to the
Instruction Manual of each option. (For the Mitsubishi inverter protocol of RS-485 communication, refer to
for the MODBUS RTU communication protocol, refer to
Password unlock error restriction
unit


Pr.297 display
Always displays 0
Displays the error count (0 to 5)
RS-485 communication
page 500.)
5.4 (E) Environment setting parameters
Communication option


page 485, and
5. PARAMETERS
3
4
5
5
5
6
7
8
9
10
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