Data Arrangement; Acyclic Data (Objects); Cyclic Data (Io Data); Ethercat Exchange Of Cyclic Data - Scaime eNod4-F ETHERNET Software User Manual

State of the ACT / LINK ETH1 and ETH2 network RJ45 connector LED:
Color State
Always on
LINK
(Eth1 & Eth2) Flashing
Green
Always off
ACT
(Eth1 & Eth2) This LED is not used.
Yellow

8.5 Data arrangement

The provision model of data is very similar to the one used in standard eNod4 CANopen (eNod4 DIN).

8.5.1 Acyclic data (Objects)

Acyclic data are available in read-only or read/write access. Each data is an object or a sub-object included in an
object. It is accessed using an index and a sub-index if it is a sub-object. Objects are stored in the eNod4 object
dictionary. The index/sub-index for eNod4 application specific data are presented in the following chapters, they are
similar to those used in standard CANopen eNod4 (eNod4 DIN).
All objects of the object dictionary are described in the EtherCAT Slave Information File (ESI), an XML file that can be
used by an EtherCAT network configuration tool.

8.5.2 Cyclic data (IO Data)

Data exchanged cyclically are either provided by the EtherCAT Slave and consumed by the Master (TxPDOs, Inputs) or
provided by the Master and consumed by the EtherCAT Slave (RxPDOs, Outputs).
The data within PDOs are object dictionary objects (same as for acyclic exchanges). PDOs and their included objects
are defined in the ESI file and are described in another chapter.

8.6 EtherCAT exchange of cyclic data

PDOs are described in ESI file. This file can be imported into the application design software. The designer can choose
PDOs he needs and assign (enable) or de-assign (disable) them. In eNod4 PDOs are of fixed size and cannot be
remapped (change objects constituting them).
There may be no RxPDO data (Outputs, data consumed by eNod4) assigned for the cyclic exchange providing that
there is at least one TxPDOs (Inputs, data produced by the eNod4) assigned. Similarly there may be no assigned
TxPDOs for cyclic data exchange providing that there is at least one assigned RxPDO.
Every PDOs are not default assigned in eNod4 (see tables below).
It is recommended to de-assign RxPDOs if there are not used in application to avoid writing of inappropriate values in
calibration parameters of eNod4.
Meaning
A link is established
The device sends/receives Ethernet frames
No link established
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User manual SCAIME:
NU-Soft-eNod4F-ETH-E-0716_235709-C.doc