Lenze EMF2192IB - Manual (Page 37)

Data transfer 7
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37 EDSMF2192IB EN 3.1
7 Data transfer
With EtherCAT, data is transmitted in "EtherCAT frames". The EtherCAT nodes only take
the data determined for them while the EtherCAT frame passes through the device.
Output data are entered in the frame the same way during the passage. Read and write
accesses are only executed in a small section of the total EtherCAT frame, the datagrams.
Thus, a frame does not need to be received completely before being processed. Processing
starts as early as possible.
EtherCAT transmits process data, parameter data, configuration data and diagnostic data
between the host system (master) and the controllers connected to the fieldbus (slaves).
The data is transmitted via corresponding communication channels depending on their
time−critical behaviour
(see chapter "Process data transfer" (
¶ 41) and chapter "Parameter data
transfer" (
¶ 42).