User Manual

Security
10.2 Program access security
LOGO!
Manual, 06/2014, A5E33039675
281
10.2
Program access security
10.2.1
Program password protection
You can protect your circuit program from unauthorized access with a password. Siemens
strongly recommends you use the password-protection to prevent unauthorized reading or
editing of your circuit programs.
For more information about assigning and changing a program password, refer to Section
"Password for circuit program protection (Page 74)".
10.2.2
Program copy protection
The Copy Protect function provides protection for the circuit programs on micro SD cards. A
circuit program is
protected
when you transfer it to a protected memory card.
This additional security feature allows you to bind the circuit program with a specific memory
card. If you copy a protected circuit program to another memory card, LOGO! cannot
recognize the program and reject loading it after you insert the card.
To execute this circuit program in LOGO!, you must leave the card in the LOGO! Base
Module during RUN mode; that is, you cannot remove the card to copy the program to other
LOGO! devices.
A circuit program with password protection is no longer protected after the correct password
has been entered; that is, you can then edit or copy the program and remove the card.
Correlation between the password and the protection function
Password
Protection
Editing
Copying
Deleting
-
-
Yes
Yes
Yes
Yes
-
Yes, with password
Yes
Yes
-
Yes
No
No
Yes
Yes
Yes
Yes, with password
Yes, with password
Yes
Enabling the protection function
To assign the copy protection function to the card, follow these steps:
1. Enter the programming mode and move the cursor to "
①": Press or
2. Confirm "
①" with
OK
.