ProSoft Technology PLX8X-MNET-61850 - Manual (Page 145)

PLX8x-MNET-61850 ♦ Communication Gateway Reference
Modbus TCP/IP to IEC 61850 User Manual
ProSoft Technology, Inc. Page 145 of 228
May 14, 2014
6.3.3 SNTP/NTP
This section cov ers the gateway’s implementation of IEC 61850-7-2 Clause 18:
Time and time-synchronization model (SNTP/NTP).
The IEC 61850 driver in the gateway i s dependent upon the gateway’s
SNTP/NTP server. The gateway can set its time by making periodic requests for
the current time to a Coordinated Universal Time (UTC) system. The user can
define a NTP server in ProSoft 61850 Configuration Manager. It must be
synchronized to some known level of accuracy, and the elapsed seconds
received by the NTP server are since a defined Epoch, and the time server shall
indicate LeapSecondsKnown (true or false).
There are two configuration parameters:
 SNTP/NTP server Address
 SNTP/NTP server Update Time (in minutes)
The ProSoft gateway hardware will be 17 seconds off per day for a Linux clock. If
better time sync is required, the setup for the SNTP/NTP time server will need to
be performed either from the internet or local clock that can sync up every one
(1) minute as configured on the gateway.