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Process Data Objects (PDO)
Process data objects (PDO) are used for data transfer in a fixed cycle.
PDOs include RxPDOs, which are used by the slaves to receive data from the
EtherCAT master unit, and TxPDOs, which are used by the slaves to send data
to the EtherCAT master unit.
(1)
PDO Mapping Settings
The PDO mapping indicates the mapping for application objects between
the object dictionary and PDO.
In this mapping table, indexes 1600 hex to 17FF hex are used for
RxPDO and 1A00 hex to 1BFF hex are used for TxPDO.
(2)
Sync Manager PDO Assignment Settings
A sync manager channel consists of several PDOs. The sync manager
PDO assignment objects describe how these PDOs are related to the
Sync Manager.
In this table, index 1C12 hex is for RxPDOs and 1C13 hex is for TxPDOs.
Service Data Object (SDO)
The MG80-EC supports SDO communications.
In Operation mode, operation parameters can be changed by reading and
writing data in the object dictionary via SDO communications.
For details, refer to “8.1 Operation Parameters” and “8.2 Object Dictionary
Structure.”
EtherCAT
master
unit
EtherCAT
slave
unit
RxPDO
output data, operation
command, and so on
TxPDO
input data, status, and so
on
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