GB/T 38844-2020Smart factory—General specification for time synchronization, time management and test in industry automation system (English PDF)

1 Scope

This standard specifies the basic composition, configuration and networking principles of the clock synchronization system for smart factories and industrial automation systems.

It describes the terms, definitions, functions, requirements of clock synchronization systems, and the methods of clock synchronization system management. It also specifies the clock synchronization system

Requirements for measurement test conditions, measurement items, measurement methods, measurement targets and measurement cycles.

This standard applies to working on the basic reference model of open system interconnection specified in GB/T 9387.1 layer 1 ~ layer 2 or layer 1 ~ layer 3,

And the physical layer complies with IEEE802.3 specifications, the data link layer complies with IEEE802.1D and GB/T 15629.2 specifications, and the network layer complies with

Industrial Ethernet switch specified by the Internet Engineering Task Force (IETF) IP protocol cluster.

2 Normative references

The following documents are essential for the application of this document. For dated reference documents, only the dated version applies to this article

Pieces. For the cited documents without date, the latest version (including all amendments) applies to this document.

GB/T 6107 Interface between data terminal equipment and data circuit termination equipment using serial binary data exchange

GB/T 9387.1 Basic reference model for open system interconnection of information technology Part 1.Basic model

GB/T 13729-2019 Telecontrol terminal equipment

GB/T 15629.2 Particular requirements for local area network and metropolitan area network for remote communication and information exchange between information technology systems Part 2

Points. logical link control

GB/T 17626.2-2018 Electromagnetic Compatibility Test and Measurement Technology Electrostatic Discharge Immunity Test

GB/T 17626.3-2016 Electromagnetic compatibility test and measurement technology RF electromagnetic field radiation immunity test

GB/T 17626.4-2018 Electromagnetic compatibility test and measurement technology Electrical fast transient pulse group immunity test

GB/T 17626.5-2019 EMC test and measurement technology surge (shock) immunity test

GB/T 17626.8-2006 EMC test and measurement technology power frequency magnetic field immunity test

GB/T 17626.9-2011 electromagnetic compatibility test and measurement technology pulse magnetic field immunity test

GB/T 17626.10-2017 Electromagnetic compatibility test and measurement technology Damped oscillating magnetic field immunity test

Accurate clock synchronization protocol of GB/T 25931 network measurement and control system

IEEE802.1D IEEE local area network and metropolitan area network standard medium access control (MAC) bridge [IEEEStandardforLocal andmetropolitanareanetworks.MediaAccessControl(MAC)Bridges]

IEEE802.3 IEEE Information Technology Standard Specific Requirements for Local Area Networks and Metropolitan Area Networks Part 3.Carrier Detection with Collision Detection

Listening to multiple access methods and physical layer specifications [IEEEStandardforInformationtechnology-Localandmetropolitan areanetworks-Specificrequirements-Part 3.CarrierSenseMultipleAccesswithColisionDetection (CSMA/CD)AccessMethodandPhysicalLayerSpecifications]

IRIGStandard200-04 IRIG serial clock code format (IRIGSerialTimeCodeFormats)

3 Terms, definitions and abbreviations