Siemens SIMATIC S7 F, Manual

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Configuration
Fail-Safe Systems
4-10
A5E00085588-03
Request for the Password for the Safety Program
A dialog box to request the password for the safety program is displayed in the
following cases:
•
Compilation of changes to the Safety Program
•
Switching safety mode on and off
•
Downloading of changes to the data of the Safety Program when safety mode
is switched off
•
Modification of F constants in CFC test mode
4.8.3 Cancelling Access Rights for the Safety Program
Validity of the Password for the Safety Program
After the password for the safety program has been entered (following a request or
a change), it is valid for an hour. In a session to edit the safety program
(modification, compilation, deactivation of safety mode, downloading of changes),
you only have to enter it once. After an hour you have to enter it again.
You also have to enter the password again if the last of the specified actions during
a session is more than an hour ago.
!
Safety Note – Authorized use of Password
If access to the ES or programming device is not limited by means of access
protection to those individuals authorized to modify Safety Programs, the efficacy
of the password protection must be ensured by means of the following
organizational measures on the ES/programming device:
•
The password must only be accessible to people with authorization.
•
People with authorization must explicitly cancel the authorization when they
exit the ES/programming device. If this is not rigorously adhered to, a screen
saver with a password accessible only to authorized people must also be used.
Cancelling Access Rights
You can cancel access rights at any time using the password for the Safety
Program. To do this, proceed as follows:
1. Select the CPU or its S7 program in SIMATIC Manager.
2. Choose the Options > Edit Safety Program menu command
3. Click the "Password..." button in the dialog box that appears.
4. In the "Password" dialog box that appears, click the "Cancel Access Rights"
button.