Operating instructions

Operating a project
8.12 Project security
MP 377, MP 377 PRO (WinCC flexible)
Operating Instructions, 10/2008, 6AV6691-1DR01-0AB0
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Users and passwords
Each user is assigned to exactly one user group.
The following people are allowed to create users and assign them passwords:
● The configuration engineer during configuration
● The administrator on the HMI device
● A user with user management authorization on the HMI device
Irrespective of the user group, each user is allowed to change his own password.
Logoff times
A logoff time is specified in the system for each user. If the time between any two user
actions, such as entering a value or changing screens, exceeds this logoff time, the user is
automatically logged off. The user must then log on again to continue to operate objects
assigned password protection.
Backup and restore
The user data is encrypted and saved on the HMI device to protect it from loss due to
power failure.
The users, passwords, group assignments and logoff times set up on the HMI device can be
backed up and restored. This prevents you having to enter all of the data again on another
HMI device.
NOTICE
The currently valid user data is overwritten in the following cases:
• Depending on the transfer settings, when the project is transferred again
• Upon restore of a backed-up project
• Upon import of the user administration via an operating element. Further information on
this may be available in your plant documentation
The retransferred or restored user data and passwords are valid with immediate effect.
Limits for user, password and user View
Number of characters
Length of user name, maximum 40
Length of password, minimum 3
Length of password, maximum 24
Entries in user view, maximum 50