Introduction - Metasys - LIT-12013352 - M4-SNE10500-0 - M4-SNE10501-0 - M4-SNE11000-0 - M4-SNE11001-0 - M4-SNE110L0-0 - M4-SNE110L1-0 - M4-SNE22000-0 - M4-SNE22001-0 - Supervisory Device - SNE10 Network Engine - SNE11 Network Engine - SNE22 Network Engine - SNE Supervisory Network Engine - 12.0

SNE Commissioning Guide

Brand
Metasys
Product name
SNE10 Network Engine
SNE11 Network Engine
SNE22 Network Engine
SNE Supervisory Network Engine
Document type
Commissioning Guide
Document number
LIT-12013352
Version
12.0
Revision date
2022-12-12
Product status
Active
Language
English

The goal of time synchronization is to maintain accurate time across all components within the Metasys system. In general, the Site Director is responsible for requesting time from an external time server, and the Site Director’s child devices request the time from the Site Director. Requests for time are done using Network Time Protocol (NTP) requests. Network-wide time management ensures that scheduling, trending, audit trailing, data collecting, time-stamping of alarms, and other functions that require accurate time management use the correct time zone, date, and time consistently for all system operations.

The following table summarizes the time sources for various system items. All time is in UTC and all system devices adjust to daylight savings time.

Table 1. Time Sources

Item

Time Source

Trend Data, Events, and Commands

Network Engine

Annotations

Metasys Server 1

Event Acknowledgements

Metasys Server1

To ensure that the correct time appears on the Site Management Portal user interface accessed from a client computer, apply the most recent Daylight Saving Time (DST) patch for the operating system on all clients that access the Site Director. The latest DST patch is available from the Microsoft Download center.

1 Includes ADS, ADX, ADS-Lite, and OAS.