SEMI E148 - Specification for Time Synchronization and Definition of the TS-Clock Object -

Abstract

The purpose of this Standard is to define the requirements for any factory component computer clock that requires synchronization of time to maintain and manage date/time accurately and consistently by using a common time synchronization protocol.

 

This Standard defines the TS-Clock object for accessing factory application and equipment time value and synchronization status, describes an example of network time synchronization architecture, and specifies which protocol to use for precise time synchronization of clocks in factory environments that use network communication.

 

RFC 5905, NTPv4 protocol for time synchronization is specified in this Standard because it is applicable to systems communicating by local area networks supporting multicast messaging including but not limited to Ethernet. This protocol enables heterogeneous systems that include clocks of various inherent precision and stability to synchronize.

This Standard applies to factory components that collect, store, distribute, and process time-sensitive data. Factory components include applications used to manufacture devices, maintain equipment, provide process resources, condition the factory, control processes. In particular, it includes the equipment used in manufacturing.

 

Referenced SEMI Standards (purchase separately)

SEMI E39 — Specification for Object Services Standard (OSS)

SEMI E120 — Specification for the Common Equipment Model (CEM)

SEMI E134 — Specification for Data Collection Management

 

Revision History

SEMI E148-0222 (technical revision)

SEMI E148-1109 (Reapproved 0614)

SEMI E148-1109 (technical revision)

SEMI E148-0309E (editorial revision)

SEMI E148-0309 (technical revision)

SEMI E148-0707 (first published)

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