Siemens 7ML5431 Operating Instructions Manual page 141

Time in Operation (4.2.2.)
Read only. The amount of time the device has been operating.
Remaining Lifetime (4.2.3.)
Read only. Lifetime (Expected) (4.2.1.) less Time in Operation (4.2.2.).
Activation of Reminders (4.2.4.)
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.
Values
1. First set the values in Reminder 1 before Lifetime (Required) (4.2.5.)/ Reminder 2 before
Lifetime (Demanded) (4.2.6.).
2. Select the desired Activation of Reminders option.
Reminder 1 before Lifetime (Required) (4.2.5.)
If Remaining Lifetime (4.2.3.) is equal to or less than this value, the device generates a
Maintenance Required reminder.
Values
1. Modify values as required.
2. Set Activation of Reminders (4.2.4.) to the desired option.
Reminder 2 before Lifetime (Demanded) (4.2.6.)
If Remaining Lifetime (4.2.3.) is equal to or less than this value, the device generates a
Maintenance Demanded reminder.
Values
1. Modify values as required.
2. Set Activation of Reminders (4.2.4.) to the desired option.
SITRANS LR250 with mA/HART
Operating Instructions, 10/2019, A5E32220602-AG
* Timer OFF
ON - no reminders checked
ON - Reminder 1 (Maintenance Required) checked
ON - Reminders 1 and 2 checked
ON - Reminder 2 (Maintenance Demanded) checked
Range: 0 to Lifetime (Expected) (4.2.1.)
Default: 0.164 years
Range: 0 to Lifetime (Expected) (4.2.1.)
Default: 0.019 years
Parameter reference
141