Omron CP1L Operation Manual page 441

Program Protection
Restrictions to Function
Block Use
Prohibiting Backing Up
the Programs to a Memory
Cassette
Usage
Apply read protection to tasks when you want to convert those task programs
to "black box" programs.
Note 1. If the CX-Programmer is used to read a task with task read protection ap-
plied, an error will occur and the task will not be read. Likewise, if the PT
Ladder Monitor function is used to read a password protected task, an er-
ror will occur and the task will not be read.
2. The entire program can be transferred to another CPU Unit even if individ-
ual tasks in the program are read-protected. The task read protection will
remain in effective for the password-protected tasks.
3. When the CX-Programmer is used to compare a user program in the com-
puter's memory with a user program in the CPU Unit, password-protected
tasks will be compared too.
Function block definitions can be read even if the entire program or individual
tasks in a program containing function blocks are read-protected. If required,
set read protection individually for each function block.
Overview
When a password is set for the entire user program or for a task from the CX-
Programmer, prohibiting backing up the user program can be set as an option.
Doing so will make it impossible to upload PLC data to the CX-Programmer
and make it impossible to save PLC data offline to a storage device.
CX-Programmer
Password?
Creating a backup to a Memory
Cassette online can be prohibited.
CPU Unit
Operating Procedure
1,2,3... 1. When registering a password in the UM read protection password Box or
Task read protection Box, select the Prohibit from saving to a memory
card , and transferring program from PLC Option.
Task 0
Accessible
END
Task 1
Not accessible
END
Task 2
Accessible
END
When a password is set for the entire user program, or for one or more tasks,
backing up the user program (i.e., creating an OBJ program file) can be prohibited.
Memory Cassette
A program file (.OBJ) cannot be created with file memory operations.
Password applied.
Task converted to "black box."
CX-Programmer
No PLC data
can be uploaded.
Section 6-7
407