Prosoft-technology PLX8X-MNET-61850 Instrukcja Użytkownika Pobierz pdf (Strona 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 covers 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 is 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.

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Prosoft-technology PLX8X-MNET-61850 Instrukcja Użytkownika Strona 145