User manual

IEC61131 User and Reference Manual
April 22, 2008
131
To unlock the target controller enter the password that was used to lock the controller in the
Password edit box. Any character string up to eight characters in length may be entered.
Typing in this edit box is masked. An asterisk is shown for each character typed.
The Cancel button closes the dialog without any action.
The OK button sends the Unlock Controller command to the controller. If the password is
correct the controller will be unlocked. If the password is not correct, the controller will
remain locked.
If the password is forgotten the Override Controller Lock command can be used to unlock
the controller. The Override Controller Lock will erase all programs in the controller.
Override Controller Lock Command
The Override Controller Lock command unlocks a controller without knowing the password.
This can be used in the event that the password is forgotten.
To prevent unauthorized access to the information in the controller, the IEC 61131
Application and C programs are erased. Use this command with caution, as the programs in
the target controller are lost.
When selected this command opens the Override Controller Lock dialog.
The Yes button unlocks the controller and erases all programs.
The No button closes the dialog without any action.
Show Lock Status Command
The Show Lock Status command displays the Lock State of the target controller. When
selected this command opens a dialog showing one of the following states:
 unlocked
 locked against programming commands
 locked against programming commands and database write
 locked against programming commands and database read/write
The OK button closes the dialog.
C/C++ Program Loader Command
The C/C++ Program Loader command opens the C/C++ Program Loader dialog. This dialog
allows the user to load, run, stop and delete C/C++ programs.