DS/EN IEC 61158-4-21
Industrial communication networks – Fieldbus specifications – Part 4-21: Data-link layer protocol specification – Type 21 elements
active, Most Current
| Organization: | DS |
| Publication Date: | 15 May 2023 |
| Status: | active |
| Page Count: | 118 |
| ICS Code (Networking): | 35.110 |
| ICS Code (Data link layer): | 35.100.20 |
| ICS Code (Industrial process measurement and control): | 25.040.40 |
scope:
The DLL provides basic time-critical data communications between devices in an automated environment. Type 21 provides priority-based cyclic and acyclic data communication using an internal collision-free, full-duplex dual-port Ethernet switch technology. For wide application in various automation applications, Type 21 does not restrict the cyclic/acyclic scheduling policy in the DLL.
Document History
DS/EN IEC 61158-4-21
May 15, 2023
Industrial communication networks – Fieldbus specifications – Part 4-21: Data-link layer protocol specification – Type 21 elements
The DLL provides basic time-critical data communications between devices in an automated environment. Type 21 provides priority-based cyclic and acyclic data communication using an internal...
June 24, 2019
Industrial communication networks – Fieldbus specifications – Part 4-21: Data-link layer protocol specification – Type 21 elements
1.1 General The DLL provides basic time-critical data communications between devices in an automated environment. Type 21 provides priority-based cyclic and acyclic data communication using an...