Endress+Hauser Proline t-mass A 150, Руководство по эксплуатации, Страница: 72 / 134

Commissioning Proline t-mass A 150 HART
72 Hauser
10.8.1 Write protection via access code
Using the customer-specific access code, the parameters for the measuring device
configuration are write-protected and their values can no longer be changed via local
operation.
Define access code
1. Navigating to the "Define access code" parameter: Setup → Advanced setup → Def.
access code
2. Define a max. 4-digit numeric code as an access code.
 The -symbol appears in front of all write-protected parameters.
Parameters that can always be changed
The write protection does not include certain parameters that do not affect the
measurement. Despite the defined access code, these parameters 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 Resetting the totalizer
Contrast display
Display interval
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 measured value display
mode from the navigation and editing view.
• If write access is activated via access code, it can be also be deactivated only via the
access code →  41.
• In the "Description of Device Parameters" documents, each write-protected
parameter is identified with the -symbol.
10.8.2 Write protection via write protection switch
Unlike write protection via user-specific access code, this allows write access to the entire
operating menu - other than the Contrast display parameter - to be locked.
The values of the parameters are still visible, but can no longer be changed (except for
Contrast display ), either via the local display, the service interface (CDI) or HART protocol.