Lenze I/O system 1000 System Manual - Manual (Page 482)

EtherCAT Kommunikation
Transmitting process data
10
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482 EDSIO1000 EN 7.0
10.2 Transmitting process data
EtherCAT transfers parameter data and process data between the master and the slaves,
which, depending on their time−critical behaviour, are divided into corresponding
communication channels.
The process data are transmitted by means of so−called "datagrams" via the process data
channel.
ƒ The I/O channels are controlled by means of the process data.
ƒ The transmission of process data is time−critical.
ƒ Process data are transmitted cyclically between the host system and the I/O system
(permanent exchange of current input and output data).
ƒ The master can directly access the process data. In the PLC, the data for example are
stored directly in the I/O area.
ƒ Process data are not saved in the I/O system.
ƒ Process data for instance are input and output data of the I/O system.
)
Note!
With regard to their direction, process data telegrams between the master and
the EtherCAT bus coupler modules that are part of the bus are differentiated
into:
ƒ process data telegrams from EtherCAT bus coupler module (Tx data)
ƒ process data telegrams to EtherCAT bus coupler module (Rx data)
)
Note!
The process data size of the I/O area is described by XML device description
files.
Import the following two files via an EtherCAT configurator for this purpose:
EtherCAT bus coupler module: Lenze_IOSystem1000_EPM_S130.xml
I/O compound module: Lenze_IOSystem1000_EPM_S130_Modules.xml