Summary of protocols
We have examined some protocols, following is a summary of the most important characteristics about them:
| Protocol | Access method | Synchronization | Comm. model | Topology |
|---|---|---|---|---|
| Modbus | CSMA-CD | N/A | P2P | Any |
| Ethernet PowerLink | TDMA | Clock, Master polling | Master/slave | Bus |
| Profinet IO | TT-Switch, TDMA | Modiefied IEEE 1588 | Master/slave | Daisy-chain, ring |
| CAN | Binary countdown | Clock | P2P | Bus |
| LIN | TDMA | Clock | Master/slave | Bus |
| FlexRay | FTDMA | Clock | Master/slave | Bus |