Siemens 7ML5431 - Page 144

Parameter reference
SITRANS LR250 with mA/HART
144 Operating Instructions, 10/2019, A5E32220602-AG
Time in Operation (4.3.2.)
The amount of time the sensor has been operating. 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 Time in Operation (4.3.2.) to zero.
Remaining Lifetime (4.3.3.)
Read only. Lifetime (Expected) (4.3.1.) less Time in Operation (4.3.2.).
Activation of Reminders (4.3.4.)
Note
To modify this parameter via SIMATIC PDM it must be accessed via the pull
-down menu
Device – Maintenance
.
Allows you to enable a maintenance reminder.
Options
Reminder 1 (Maintenance Required)
Reminder 2 (Maintenance Demanded)
Reminders 1 and 2
*
OFF
1. First set the values in Reminder 1 before Lifetime (Required) (4.3.5.)/Reminder 2 before
Lifetime (Demanded) (4.3.6.).
2. Select the desired Activation of Reminders option.
Reminder 1 before Lifetime (Required) (4.3.5.)
If Remaining Lifetime (4.3.3.) is equal to or less than this value, the device generates a
Maintenance Required reminder.
Values
Range: 0 to Lifetime (Expected) (4.3.1.)
Default: 0.164 years
1. Modify values as required.
2. Set Activation of Reminders (4.3.4.) to the desired option.