Operating Instructions

Table Of Contents
8.6.17 Total Sensor Operating Time (SENS OP. TIME) (3.16.1.)
Displays the amount of time the sensor has been operating in selected units. Can be reset to
zero after performing a service or replacing the sensor.
To reset to zero:
In SIMATIC PDM, open the menu Device – Maintenance, click on the Remaining Sensor
Lifetime tab, and click on Sensor Replaced to restart the timer and clear any fault messages.
Via the handheld programmer, manually reset Total Sensor Operating Time to zero.
8.6.18 Remaining Sensor Lifetime (REMAIN. LIFETIME) (3.16.2.)
Read only. Total Expected Sensor Life less Total Sensor Operating Time in selected units.
8.6.19 Maintenance Required Limit (MAINT. REQ. LIMIT) (3.16.3.)
If Remaining Sensor Lifetime is equal to or less than this limit, the device sets Maintenance
Required.
Values Range: 0 to 20 years
Default: 0.164 years
To modify the value via PDM, open the menu Device – Maintenance and click on Remaining
Sensor Lifetime.
1. Modify limit values as required.
2. Enable 3.16.5. Maintenance Alert Activation (ALERT ACTIVATION) . Click on Write to
accept the changes.
8.6.20 Maintenance Demanded Limit (MAINT. DEM. LIMIT) (3.16.4.)
If Remaining Sensor Lifetime is equal to or less than this limit, the device sets Maintenance
Demanded.
Values Range: 0 to 20 years
Default: 0.019 years
To modify the value via PDM, open the menu Device – Maintenance and click on Remaining
Sensor Lifetime.
Modify limit values as required.
Enable 3.16.5. Maintenance Alert Activation (ALERT ACTIVATION) (Page 102). Click on Write
to accept the changes.
Parameter reference
8.6 Diagnostics (3.)
SITRANS LR260 with mA/HART
Operating Instructions, 11/2019, A5E32337683-AD 101