Lenze E84AYCEC - Manual (Page 45)

EDS84AYCEC EN 3.0 - 09/2012
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45
E84AYCEC communication manual (Ethernet POWERLINK)
Process data transfer
7 Process data transfer
Ethernet POWERLINK transmits process data, parameter data, configuration data and
diagnostic data between the managing node and the controlled nodes. Depending on their
time-critical behaviour, the data are transmitted via different communication channels.
 Process data are transmitted via the process data channel.
 Process data serve to control the Inverter Drive 8400.
 The transfer of process data is time-critical.
 Process data are cyclically transferred between the managing node and the controlled
nodes (permanent exchange of current input and output data).
 The managing node can directly access the process data. In the PLC, for instance, the
data are directly assigned to the I/O area.
 Up to 16 process data words (16 bit/word) can be exchanged per direction.
 Process data are not saved on the controller.
 Process data are, for instance, setpoints, actual values, control and status words.