Process Data Objects (Pdo); Overview; Pdo Mapping Settings - Omron E3NX-FA Operation Manual

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Process Data Objects (PDO)

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Overview

The process data objects (PDO) are used for real-time data transfer via cyclic communications.
PDOs include RxPDOs, which are used by the slaves to receive data from the EtherCAT master, and
TxPDOs, which are used by the slaves to send data to the EtherCAT master.
EtherCAT
Master
Unit
It is possible to hold multiple objects in the EtherCAT application layer so that various process data of
EtherCAT Sensor Communication Units can be transferred. The details of process data are described
in PDO Mapping Objects and Sync Manager PDO Assignment Objects.
E3NW-ECT EtherCAT Sensor Communication Units support PDO mapping for I/O control.
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PDO Mapping Settings

The PDO mapping indicates the mapping for application objects (realtime process data) between the
object dictionary and PDO.
The number of mapped objects is described in sub-index 0 of the mapping table. In this mapping table,
indexes 1600 hex to 17FF hex are used for RxPDO and 1A00 hex to 1BFF hex are used for TxPDO.
E3NW-ECT EtherCAT Digital Sensor Communication Unit Operation Manual (E429)
RxPDO
output data, operation command, and so on
TxPDO
input data, status, and so on
5 EtherCAT Communications
EtherCAT
Slave
Unit
5
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