23.5.3 Log in/Log off
Log in
If you set [Log in] in [Action] of the special switch, you can
create a log-in switch for changing the current security level.
When you touch the log-in switch, the Security Password screen
appears.
-
For Level Mode, any password of any level is
accepted if a password is set for the level in the security
setting. When a proper password is entered, the "current security
level" is changed to the level for which the password is set.
Example, Password Settings
|
Level
|
Password
|
|
1
|
aaa
|
|
2
|
|
|
3
|
ccc
|
-
Enter the password "aaa" and press [ENT] ->
Current security level = 1
-
Enter the password "ccc" and press [ENT] ->
Current security level = 3
-
For User ID Mode, any ID is accepted if the ID
exists for the security setting. When a proper password is entered,
the "current security level" is changed to the level for which the
ID is set, and the system variable "H_LoginUserID" is updated.
Example, Password Settings
|
Level
|
ID
|
Password
|
|
1
|
AAA
|
aaa
|
|
2
|
BBB
|
bbb
|
|
3
|
CCC
|
ccc
|
-
Enter the ID "AAA" and press [OK] -> Current
security level = 1
-
Enter the ID "BBB" and press [OK] -> Current
security level = 2
-
Enter the ID "CCC" and press [OK] -> Current
security level = 3
-
You can log in to the same level as or lower
level than the current security level.
-
Regardless of the security level of the screen on
which a log-in switch is placed, you can log in any level.
-
On the password input screen for the log in, "0"
is displayed in the "LEVEL" field.
-
On the password input screen, when [ESC] (for
Level Mode) or [Cancel] (for User ID Mode) is pressed, the password
input screen disappears and the screen before login is
displayed.
-
If the security level clear time has passed while
password input screen is displayed, the password input screen
disappears and he screen before log in is displayed
-
On the password input screen, if a password that
does not exist is entered and [ENT] is pressed (in Level Mode), or
if different password is entered and [OK] is pressed (in User ID
Mode), an error message is displayed.
-
If actions with other security settings occur
while the password input screen is displayed for log in, the
behavior as follows will take place.
Interruptions to the password input screen.
Screen Change
|
Relationship between Interrupt Request Level
and Current Level
|
Condition after Interruption
|
Log in
|
|
Current level < Request level
|
New password screen is displayed
|
Cancel
|
|
Current level >= Request level
|
Screen is changed
|
Cancel
|
Window Display
|
Relationship between Interrupt Request Level
and Current Level
|
Condition after Interruption
|
Log in
|
|
Current level < Request level
|
The password screen remains displayed. If
password input is cancelled, the password window screen is
displayed immediately.
|
Password input process continues
|
|
Current level >= Request level
|
The password screen remains displayed. The
window is display in the background.
|
Password input process continues
|
Log
off
If you set [Log off] in [Action] of the special switch, you can
create a log-off switch for clearing the current security
level.
-
The current security level can be cleared (= 0)
using a log off switch.
When the log-off switch is pressed, the screen changes as set up,
and the current security level and the system variable
#H_LoginUserID are cleared.
-
If a security level is set on the screen after
log off, the following behavior will take place.
-
The level of the screen after log off is the
same or lower than the current level
The screen will change and the level is cleared.
-
The level of the screen after log off is higher
than the current level
Password input screen is displayed. You cannot log off unless
authentication is successful.
-
If the base screen of the log off screen number
does not exist, only the current security level is cleared. The
screen will not be changed.
-
Clearing of the system variable #H_LoginUserID is
the same as the usual level clearing.
-
The log-off switch will not function if there is
no password setting for the project data.
Current Level
The current security level is stored in LS9301 (Security
function status). However, you cannot change the values in LS9301
(Read-only).
When operating from GP-Viewer
As for operation from GP-Viewer, the log-in/log-off switch does
not function regardless of Synchronous/Asynchronous Mode. If the
log-in/log-off switch is pressed on the GP-Viewer side, an error
message is displayed.
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