6-26
■ Password lock function
This controller has a password lock function using a password in addition to the
key lock function. It offers a double security so that the key lock setting itself
cannot be changed by unauthorized operators. In password lock function, the
setting to disable the change in key lock function cannot be displayed.
The passwords are made by two groups of numerical values. Each value consists
of 4 digits. The setting can be changed only when the two groups (1A and 1B, 2A
and 2B) are matched. In order to prevent incorrect password setting, the password
cannot be set if the setting value is set to 5 in the password display. In addition, the
setting value of this password display is returned to zero (0) at every power supply
ON.
● Password setup flow
Setting of password display The status is changed to the one under which the password
can be set.
Setting of passwords (1A, 2A) When PS1A and PS2A are set, the PS1B is same as the
PS1A, and the PS2A is same as the PS2B.
Setting of password (1B, 2B) When the PS1B and the PS2B are set to the values
different from the ones of PS1A and PS2A, the mode is
changed to the password lock status and the setting cannot
be made.
Cancellation of password lock When the PS1B is set to the same value as the PS1A in
the password setting and the PS2B is set to the same value
as the PS2A, the password lock status is cancelled.
In addition, when setting to the mode where the password
setting cannot be made, set the setting value of PASS
password display to the value other than 5.
Chapter 6. SETTINGS DURING OPERATION