Siemens C79000-Z7076-C552-01 ユーザーズマニュアル

New Functions in Version V4.02

3

Supplement to the STEP 7 User Manual V4.0
C79000-Z7076-C552-01

With the aid of password protection you can:

Protect the user program and its data in the CPU against unwanted changes
(write protection),

Protect the know-how in your user program (read protection),

Inhibit online functions which would interfere with the process.

You can only assign a password to a module if the module supports this function.

If you want to protect a module with a password, you must define the level of
protection and the password in the module parameter assignment, and then
download the modified parameters to the module (see Chapter 3, New CPU
Parameters).

If a password is required before an online function can be executed, the dialog box
“Enter Password” is displayed. By entering the correct password you are
authorized to access modules which have been assigned parameters specifying a
special level of protection. You can then establish online connections to the
protected module and execute the online functions which have been protected.

You can use the menu command PLC 

 Access Rights to open the “Enter

Password” dialog box directly. Here you can specify that the password entered
should be used for all future access to protected modules. The dialog box will then
only appear if this password is invalid.

The tabbed dialog box which you open with the menu command Options 

Customize has been expanded and restructured. For example, you can now
select a “Quick View” when diagnosing hardware (see Chapter 10).