CEI EN 61158-4-21
Industrial communication networks - Fieldbus specifications Part 4-21: Data-link layer protocol specification - Type 21 elements
inactive
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| Organization: | CEI |
| Publication Date: | 1 November 2013 |
| Status: | inactive |
| Page Count: | 112 |
| ICS Code (Networking): | 35.110 |
| ICS Code (Data link layer): | 35.100.20 |
| ICS Code (Industrial process measurement and control): | 25.040.40 |
scope:
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 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
October 1, 2019
Industrial communication networks - Fieldbus specifications Part 4-21: Data-link layer protocol specification - Type 21 elements
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 internal...
CEI EN 61158-4-21
November 1, 2013
Industrial communication networks - Fieldbus specifications Part 4-21: Data-link layer protocol specification - Type 21 elements
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 internal...