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170
Misoperation prevention and parameter setting restriction
<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 "101 to 106, 199"], if password unlock error has occurred 5 times, correct password will not unlock
the restriction. (During password lock)
Perform all parameter clear.
(3) Parameter operation during password lock/unlock
∗1 Reading/writing is unavailable when there is restriction to reading by the Pr. 160 setting. (Reading is available in NET mode regardless of Pr. 160 setting.)
∗2 Unavailable during the operation.
∗3 Correct password will not unlock the restriction.
NOTE
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.
Parameter operation
Unlocked Password registered Locked
Pr. 296 = 9999
Pr. 297 = 9999
Pr. 296 ≠ 9999
Pr. 297 = 9999
Pr. 296 ≠ 9999
Pr. 297 = 0 to 4
(Read value)
Pr. 296 = 101 to 106, 199
Pr. 297 = 5
(Read value)
Pr. 296
Read ∗1
Write ∗1 ∗1
××
Pr. 297
Read ∗1
Write × ∗3
Performing parameter clear ××
Performing parameter all clear
∗2 ∗2
: enabled, ×: restricted
Parameters referred to
Pr. 77 Parameter write selection Refer to page 166
Pr. 160 Extended function display selection
Refer to page 167