Eaton EDR 3000 Installation, Operation And Maintenance Manual page 261

Fault Analysis
If there is no SNTP signal for more than 120 seconds., the SNTP status changes from "active" to "inactive" and an entry
in the Event Recorder will be set.
The SNTP functionality can be checked in the [Operation/Status Display/Time Sync./Sntp] menu.
If the SNTP status is not "active", please proceed as follows:
Check if the wiring is correct (Ethernet-cable connected).
Check if a valid IP address is set in the device (Device Para/TCP/IP).
Check if the Ethernet connection is active (Device Para/TCP/IP/Link = Up?).
Check if the SNTP server as well as the protection device answers to a Ping.
Check if the SNTP server is up and working.
EDR-3000
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