Siemens Sitrans LR250 Instruction Manual page 74

3.15.4. Maintenance Demanded Limit
If the Total Expected Device Life less Total Device Operating Time is equal to
or less than this limit, a Maintenance Demanded status is generated.
Values
In SIMATIC PDM, open the menu Device – Maintenance, click on Remaining
Device Lifetime.
a) Enable
b) Modify limit values as required. Click Write to accept the changes.
3.15.5. Maintenance Alert Activation
Select limits to be activated.
Options
To enable or disable Maintenance Alert Activation via PDM:
a) Open the menu
Lifetime.
b) Select either or both of Enable Maintenance Required Alert and Enable
Maintenance Demanded Alert. Click Write to accept the changes.
3.15.6. Total Expected Device Life
The device tries to predict its overall lifetime. The factory default can be reset
by the user.
Values
To modify the value via PDM, open the menu Device – Maintenance, click on
Remaining Device Lifetime, enter the desired value then click Write to accept it.
3.15.7. Maintenance Status
Read only. Displays the status of the Maintenance Alerts.
Options
(view only)
Open the menu View – Display Status, click on the Maintenance tab and
check the Device Lifetime Status window.
Page 78 SITRANS LR250 (HART) – INSTRUCTION MANUAL
Range: 0 to 20 years
Default: 0.019 years
3. 1 5.5. Maintenance Alert Activation
Warning Limit 1 (Maintenance Required Limit)
Warning Limit 2 (Maintenance Demanded Limit)
Warning Limits 1 and 2 (Maintenance Required and
Maintenance Demanded Limits)
* OFF
Device – Maintenance
Range: 0 to 20 years
Default: 10.00 years
Maintenance Required Alert active
Maintenance Demanded Alert Active
.
, click on Remaining Device
7ML19985JE01