Lenze I/O system 1000 - 7.3 Transmitting parameter data

Lenze · I/O system 1000 · Reference Manual · DMS 5.0 EN · 09/2016 · TD17 328
7 EtherCAT communication
7.3 Transmitting parameter data
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7.3 Transmitting parameter data
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.
• Access to all indexes with CoE (CAN over EtherCAT) is enabled via the SDO channel.
• The transfer of parameter data is not normally time-critical.
• 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 jobs from a slave if the slave is at least in the "Pre-
operational" state.
Acyclic data transfer
Parameters ...
• are values which are stored under an index in the Lenze I/O system.
• are, for instance, used for one-off plant settings or a change of material in a machine.
• are transmitted with a low priority.
 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".