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EtherCAT (Link Layer (2 Link Layer operating modes (Interrupt mode (All…
EtherCAT
Link Layer
Link Layer Parameter
Entscheiden welche Link Layer library geladen wird
2 Link Layer operating modes
Interrupt mode
All received Ehternet frames will be processed immediately in the context of the link layer receiver task
Polling Mode
EtherCAT master will call the Link Layer receiver polling function prio to processing received frames
Optimized Linked Layer Driver
operating diretyl on the network device's register set instead of using the operating system's native driver.
ENI (EtherCAT Network Configuration)
The master must know about
EtherCAT bus topology
cyclic/acyclic frames to exchange with the slaves
Required parameters
identification of the network adapter card to use
The priority of the EtherCAT master timer task
etc.
Operating system
network adapters must support at least 100 MBit
The link layer drivers must be chosen
maybe the system must be configured with special steps
Process Data Memory
Input process data memory
Data which has been received from slaves
Output Process Data Memory
values which shall be sent to slaves