GFK-0467K Chapter 2 System Operation 2-37
2
Privilege Level Change Requests
A programmer requests a privilege level change by supplying the new privilege level and the
password for that level. A privilege level change is denied if the password sent by the programmer
does not agree with the password stored in the PLC’s password access table for the requested
level. The current privilege level is maintained and no change will occur. If you attempt to access
or modify information in the PLC using the Hand-Held Programmer without the proper privilege
level, the Hand-Held Programmer will respond with an error message that the access is denied.
Locking/Unlocking Subroutines
Subroutine blocks can be locked and unlocked using the block locking feature of programming
software. Two types of locks are available:
Type of Lock Description
View Once locked, you cannot zoom into that subroutine.
Edit Once locked, the information in the subroutine cannot be edited.
A previously view locked or edit locked subroutine may be unlocked in the block declaration
editor unless it is permanently view locked or permanently edit locked.
A search or search and replace function may be performed on a view locked subroutine. If the
target of the search is found in a view locked subroutine, one of the following messages is
displayed, instead of logic:
Found in locked block <block_name> (Continue/Quit)
or
Cannot write to locked block <block_name> (Continue/Quit)
You may continue or abort the search.
Folders that contain locked subroutines may be cleared or deleted. If a folder contains locked
subroutines, these blocks remain locked when the programming software Copy, Backup, and
Restore folder functions a re used.

Permanently Locking a Subroutine

In addition to VIEW LOCK and EDIT LOCK, there are two types of permanent locks. If a
PERMANENT VIEW LOCK is set, all zooms into a subroutine are denied. If a PERMANENT
EDIT LOCK is set, all attempts to edit the block are denied.
Caution
The permanent locks differ from the regular VIEW LOCK and EDIT
LOCK in that once set, they cannot be removed.
Once a PERMANENT EDIT LOCK is set, it can onl y be chan g ed t o a PE RMANENT VIEW
LOCK. A PERMANENT VIEW LOCK cannot be changed to an y other t ype of lock.