Process Data Objects (Pdo) - ABB RECA-01 User Manual

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• Process Data Object (PDO)
•The PDO object is used for cyclic I/O communication, i.e.
• Service Data Object (SDO)
•The SDO object is used for acyclic data transmission.
• Emergency Object (EMCY)
•The EMCY object is used for error reporting when a fault has
The object dictionary is described in chapter
on page 59.

Process Data Objects (PDO)

Process Data Objects (PDOs) are used for exchanging time-
critical process data between the master and the slave. Tx PDOs
are used to transfer data from the slave to the master and Rx
PDOs to transfer data from the master to the slave.
PDO mapping defines which application objects are transmitted
inside a PDO. These typically include the Control and Status
Words, References and Actual Values, but most CoE dictionary
objects and drive parameters can be mapped for cyclical
communication.
RECA-01 has three receive PDOs and three transmit PDOs. Each
PDO can have 0...8 application objects mapped inside it. The
default mappings for the PDOs are described in tables
receive PDO mapping
page 53. Changing the mapping of the PDOs is only possible in
the pre-operational state.
Communication
process data.
occurred in the drive or module.
and Default transmit PDO mapping
CoE object dictionary
Default
on