Equipment Description
SafeEthernet
Overview | This section provides information about SafeEthernet protocol and OSI model. |
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Description | In the field of automation, requirements, such as determinism, reliability, |
| interchangeability, extensibility, interoperability and the overall safety are central |
| themes. Based on the Ethernet technology, SafeEthernet provides a transfer |
| protocol for transmitting |
| implements a mechanism that can detect and react to the following: |
| Corruption of transmitted data |
| Incorrect address allocation for the messages (transmitter, receiver) |
| Incorrect data sequence (repetition, loss, change) |
| Incorrect timing (delay, echo) |
| SafeEthernet is based on the standard Ethernet or FastEthernet according to |
| IEEE 802.3. |
| The transmission of the |
| the standard Ethernet. |
| According to the Black Channel Approach in SafeEthernet, "insecure transmission |
| channels" (Ethernet) are used and controlled by |
| at transmitter and receiver. This way, regular Ethernet network components, such |
| as hubs, switches, routers, and PCs supplied with network interfaces can be used |
| within a |
| determinism, the |
| A special protocol mechanism ensures deterministic behavior even in case faults |
| occur or new communication participants emerge. New components are |
| automatically integrated into the running system. All components of the network |
| could be changed while the system is running. With the use of switches, |
| transmission times can be clearly defined. This way, Ethernet works in real time. |
| Possible transfer speed up to 100Mbit/s for |
| speed normally used. Copper lines as well as fiber optic cables can be used as |
| transmission media. The integration of firm intranets as well as connections to the |
| Internet, can be realized with SafeEthernet technology. The terms for |
| communication have to be considered. |
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