Rockwell Automation 1756-HIST2G FactoryTalk Historian ME 2.2 - Manual (Page 143)

8 • A DMINISTERING THE M ODULE
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Check the NTP Server field to ensure that your NTP server is properly set. Note the
“time reset” and “synchronize to” messages, which indicate successful
synchronization.
If the time synchronization with an NTP server (including a FactoryTalk Historian
SE or PI server) is not successful, you may see the following error messages in the
NTP Logs section.When any of these error messages are logged, check to make sure
that the NTP server is running properly, and then reboot the module to synchronize
with the NTP server again.
NTP Log Message Message Information
sendto(“'IP”) (fd=-1): bad file
descriptor (fd=-1) Where IP is the IP address of the NTP
Server.
frequency error xxx PPM exceeds
tolerance 500 PPM Where xxx is the PPM value that is larger
than 500.
Verify your NTP
server is listed
Note “time reset” and
“synchronized to”
messages