Ethernet 8-21
AC30 series Variable Speed Inverters
Simple Network Time Protocol (SNTP) Server
The SNTP Server is implemented in the AC30P and AC30D inverters.
The SNTP Server may be used to share the time and date within a local network.
SNTP Server Parameter Summary
Parameter Name No. Path Default Range Units Writable
189
1
Parameters::Base Comms::SNTP Server
FALSE
FALSE
TRUE
ALWAY
S
Enables the Simple Network Time Protocol Server
SNTP Server Operation
The server requires no configuration other than a simple enable / disable. It will respond to requests from SNTP clients, returning the time from
the local parameter PNO1186 “Time and Date”. This may be useful in a local network that has no access to the World Wide Web or any other PC
or Ethernet device that has a local time source. In this case the AC30 with the server enabled should be fitted with a Real Time Clock to allow the
time to be preserved during a power outage. The local RTC hardware only tracks time to the nearest second. This limits the precision of the
AC30 SNTP server.
The SNTP server transmits UTC time, see above for a description of the relationship between UTC time, the local time zone and daylight saving.
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