Lenze I/O system 1000 System Manual - Manual (Page 484)

EtherCAT Kommunikation
Transmitting parameter data
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484 EDSIO1000 EN 7.0
10.3 Transmitting parameter data
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Note!
Parameter data can be transferred from the EtherCAT master to the EtherCAT
bus coupler module EPM−S130 (slave). Once the EtherCAT master has been
started, the data is transferred to the bus coupler module where the settings
are accepted after the change from "Pre−operational" operating mode to
"Operational".
EtherCAT transfers parameter data and process data between the master and the bus
coupler modules, which, depending on their time−critical behaviour, are divided into
corresponding communication channels.
Parameter data (SDOs, service data objects) are transmitted via the SDO channel.
ƒ Access to all indexes with CoE (CAN over EtherCAT) is enabled via the SDO channel.
ƒ The transfer of parameter data is not normally time−critical.
ƒ Parameter data corresponds to the indexes of the index list for the EtherCAT bus
coupler module
Establishment of connection between the master and slave
Basically a master can always request parameter tasks from a slave if the slave is at least
in the "Pre−operational" state.
Acyclic data transmission
Parameters ...
ƒ are values which are stored under an index in the Lenze I/O system.
ƒ for instance are used if the system is set once or if material is changed within a
machine.
ƒ are transmitted with a low priority.