Lenze E84DGFCT - Manual (Page 37)

EDS84DMOTECAT EN 2.1 - 11/2012
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Communication manual 8400 motec EtherCAT®
Process data transfer
8 Process data transfer
 Process data are transmitted by means of so-called EtherCAT datagrams ( 34) via the
process data channel.
 The Inverter Drive 8400 motec is controlled by means of the process data.
 Transferring process data is time-critical.
 Process data are cyclically transferred between the host (master) and the controllers
(slaves) (continuous exchange of current input and output data).
 The master can directly access the process data. In the PLC for instance, the data are
directly stored in the I/O area.
 A maximum of 10 process data words (max. 20 bytes) can be sent to the master.
 A maximum of 8 process data words (max. 16 bytes) can be sent by the master.
 Process data are not saved to the Inverter Drive 8400 motec.
 Process data are for instance setpoints, actual values, control words, and status words.