Process Data Architecture For Ethercat - WAGO I/O-SYSTEM 750 Manual

154 I/O Modules
11.2

Process Data Architecture for EtherCAT

In the case of an EtherCAT
structure (with word alignment). The internal mapping method for data greater
than one byte conforms to the Intel format.
The following section describes the process image for various WAGO-I/O-
SYSTEM 750 and 753 I/O modules when using an EtherCAT
The fieldbus coupler processes diagnostic information provided by the I/O
modules in addition to the process images. Diagnostic information is reported by
the fieldbus coupler in the diagnostic status word.
When using digital I/O modules with diagnostics, the status of the diagnostic
information is entered, like that provided by the I/O module, in the EVTCODE bit
field of the diagnostic status word.
Additional information about the diagnostic status word
The structure of the diagnostic status word is available in the "Diagnostics"
chapter,  "I/O Module Diagnostics"  "Diagnostic Status Word"
When using analog I/O modules, the EVTCODE bit field is set to the value 7'
during the occurrence of a diagnostic event.
Equipment damage due to incorrect address!
Depending on the specific position of an I/O module in the fieldbus node, the
process data of all previous byte or bit-oriented modules must be taken into
account to determine its location in the process data map.
Manual
Version 1.2.1
750-354/000-001 EtherCAT® Fieldbus Coupler, ID Switch
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fieldbus coupler, the process image uses a word
WAGO-I/O-SYSTEM 750
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fieldbus coupler.