Endress+Hauser Proline Promass Q 500, Operating Instructions Manual

Page: 145 / 280

Proline Promass Q 500 PROFIBUS PA Commissioning
Hauser 145
10.9 Protecting settings from unauthorized access
The following write protection options exist in order to protect the configuration of the
measuring device from unintentional modification:
• Protect access to parameters via access code →  145
• Protect access to local operation via key locking →  73
• Protect access to measuring device via write protection switch →  146
10.9.1 Write protection via access code
The effects of the user-specific access code are as follows:
• Via local operation, the parameters for the measuring device configuration are write-
protected and their values can no longer be changed.
• Device access is protected via the Web browser, as are the parameters for the measuring
device configuration.
• Device access is protected via FieldCare or DeviceCare (via CDI-RJ45 service interface), as
are the parameters for the measuring device configuration.
Defining the access code via local display
1. Navigate to the Define access code parameter (→  141).
2. Define a max. 16-digit character string comprising numbers, letters and special
characters as the access code.
3. Enter the access code again in the Confirm access code parameter (→  141) to
confirm the code.
 The -symbol appears in front of all write-protected parameters.
The device automatically locks the write-protected parameters again if a key is not pressed
for 10 minutes in the navigation and editing view. The device locks the write-protected
parameters automatically after 60 s if the user skips back to the operational display mode
from the navigation and editing view.
• If parameter write protection is activated via an access code, it can also only be
deactivated via this access code →  73.
• The user role with which the user is currently logged on via the local display is
indicated by the →  73 Access status parameter. Navigation path: Operation
→ Access status
Parameters which can always be modified via the local display
Certain parameters that do not affect the measurement are excepted from parameter write
protection via the local display. Despite the user-specific access code, they can always be
modified, even if the other parameters are locked.
Parameters for configuring
the local display
Parameters for configuring
the totalizer
↓ ↓
Language Format display Control Totalizer
Contrast display Preset value
Display interval
Defining the access code via the Web browser
1. Navigate to the Define access code parameter (→  141).
2. Max. Define a max. 4-digit numeric code as an access code.