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CJ1-H/CJ1M CPU Unit Ver. 2.0 Upgrades Section 1-5
Usage
Apply read protection to tasks when you want to convert those tasks (pro-
grams) to “black box” programs.
Note 1. If CX-Programmer Ver. 3.2 or a lower version is used to read a task with
task read protection applied, an error will occur and the task will not be
read. Likewise, if a Programming Console or the PT Ladder Monitor func-
tion is used to read a password protected task, an error 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. It is also possible to connect
online and create a program file (.OBJ file) with file memory operations. In
both cases, the task read protection remains 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.
Restrictions to Function
Block Use
Function block definitions can be read even if the entire program or individual
tasks in a program containing function blocks (CPU Unit Ver. 3.0 or later only)
are read-protected.
Enabling/Disabling Creating File Memory Program Files
Previous CPU Units (Pre-
Ver. 2.0 CPU Units)
With the pre-Ver. 2.0 CS/CJ-series CPU Units, it was possible use file mem-
ory operations to transfer a program file (.OBJ file) to a Memory Card even if
the program was protected with UM read protection. (Consequently, illegal
copies could be made.)
CPU Unit Ver. 2.0 or Later
and CX-Programmer
Ver. 4.0 or Higher
Overview
When the entire program or individual tasks in a CPU Unit Ver. 2.0 or later are
read-protected from the CX-Programmer, an option can be set to enable or
disable the creation/backup of .OBJ program files. It will not be possible to
create program files (.OBJ files) with file memory operations if the creation/
backup of program files is prohibited with this setting. (This setting prohibits
both online transfers to a Memory Card/EM file memory as well as offline stor-
age of PLC data that was uploaded to the CX-Programmer.)
END
END
END
Task 0
Task 1
Task 2
Password applied.
Task converted to "black box."
Accessable
Not accessable
Accessable
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