GB/T 38844-2020 (English Version) PDF

Scope: This standard specifies the basic composition, configuration and networking principles of the clock synchronization system for smart factories and industrial automation systems, specifies the terminology, definition functions, requirements of the clock synchronization system, and the management method of the clock synchronization system. The measurement test conditions of the synchronization system, the measurement method of the measurement item, the measurement target and the measurement cycle and other requirements. This standard is applicable to work in the basic reference model of open system interconnection specified in GB/T9387.1 Layer 1-2 or layer 1-3, and the physical layer conforms to IEEE802.3 specification, and the data link layer conforms to IEEE802. 1D and GB/T15629.2 specifications, the network layer conforms to the industrial Ethernet switch of the Internet Engineering Task Force (CIETEF) IP protocol complex specification.

GB/T 38844-2020 Referenced Document

GB/T 13729 Remote terminal unit equipment
GB/T 15629.2 Information technology.Telecommunications and information exchange between systems.Local and metropolitan area networks.Specific requirements.Part 2:Logical link control
GB/T 17626.10 Electromagnetic compatibility—Testing and measurement techniques—Damped oscillatory magnetic field immunity test
GB/T 17626.2 Electromagnetic compatibility.Testing and measurement techniques.Electrostatic discharge immunity test
GB/T 17626.3 Electromagnetic compatibility test and measurement technology Part 3: Radio frequency electromagnetic field radiation immunity test*， 2023-12-28 Update
GB/T 17626.4 Electromagnetic compatibility－Testing and measurement techniques－Electrical fast transient/burst immunity test
GB/T 17626.5 Electromagnetic compatibility—Testing and measurement techniques－Surge immunity test
GB/T 17626.8 Electromagnetic compatibility Testing and measurement techniques Power frequency magnetic field immunity test
GB/T 17626.9 Electromagnetic compatibility. Testing and measurement techniques. Pulse magnetic field immunity test
GB/T 25931 Precision clock synchronization protocol for networked measurement and control systems
GB/T 6107 Interface between data terminal equipment and data circuit termination equipment employing serial binary data interchange
GB/T 9387.1 Information technology--Open Systems Interconnection--Basic Reference Model--Part 1: The Basic Model
IEEE 802.3

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