Operating Instructions

Remaining Device Lifetime (4.2.)
Note
● Default settings in the parameter tables are indicated with an asterisk (*) unless explicitly
stated.
● Four sets of parameters allow you to monitor the Device/Sensor Lifetimes and set up
Maintenance/Service schedules, based on operating hours instead of a calendar-based
schedule. See also Remaining Sensor Lifetime (4.3.), Service Schedule (4.4.),
and Calibration Schedule (4.5.).
● Performing a reset to Factory Defaults will reset all the Maintenance Schedule parameters
to their factory defaults.
● The device operates in years. To view Remaining Device Lifetime parameters in hours or
days (via SIMATIC PDM only) see Lifetime (Expected) (4.2.1.).
The device tracks itself based on operating hours and monitors its predicted lifetime. You can
modify the expected device lifetime, set up schedules for maintenance reminders, and
acknowledge them.
The maintenance warnings and reminders are available through HART communications. This
information can be integrated into an Asset Management system. For optimal use, we
recommend that you use SIMATIC PCS7 Asset Management Software in conjunction with
SIMATIC PDM.
To access these parameters via SIMATIC PDM:
● Open the menu Device – Maintenance and select the Remaining Device Lifetime tab.
● After modifying values/units as required, click on Write to accept the change, and Read to
view the effect of the change.
● Click on Snooze to add a year to the Total Expected Device Life.
Time Units
Options
a)
Hours; days; years
Default: years
a)
Selectable only via SIMATIC PDM.
Parameter reference
SITRANS LR250 with mA/HART
132 Operating Instructions, 10/2019, A5E32220602-AG