Object Dictionary; Structure "Module Ident; Table 81: Structure Of "Module Ident" For Digital I/O Modules - WAGO I/O-SYSTEM 750 Manual

96 Function Description
7.4

Object Dictionary

The EtherCAT
available objects are entered.
Additional Information about the Object Dictionary
A listing of all objects and the meaning of the entries is described in the
appendix > "EtherCAT
Certain special objects from the complete list in the appendix will be presented in
more detail in the following sections.
7.4.1

Structure "Module Ident"

Some of the objects documented below use the term "Module Ident". This is
defined by the modular device profile and should represent a 32-bit ID that
uniquely identifies one I/O module (when possible).
Based on the history of the local bus system, a unique 32-bit ID cannot be
defined for most I/O modules. All digital I/O modules, among others, are affected
by this. For complex I/O modules, variants cannot be completely uniquely
identified because the scope of the configuration data is too large to be included
in a 32-bit ID. The distinguishing features that flow into the ID are, however,
sufficient in each case to enable sensible online and offline configurations.
The "Module Ident" is structured for digital I/O modules as follows:

Table 81: Structure of "Module Ident" for Digital I/O Modules

Module Ident = 0x8aabbccd
Code
aa
bb
cc
d
Example of 750-418, 2-Channel Digital Input with Diagnostics
Module Ident =
• 8 – digital I/O module,
• 02 – internal parameter of the module,
• 02 – two digital bits,
• 02 – two channels,
• 3 – inputs present, outputs present (acknowledgement bits)
The "Module Ident" is structured for complex I/O modules as follows:
Manual
Version 1.2.1
750-354/000-001 EtherCAT® Fieldbus Coupler, ID Switch

fieldbus coupler contains an Object Dictionary in which all

Object Dictionary".
Explanation
An internal parameter of the module
Number of diagnostics bits
Number of channels
Input/output data:
Bit 0 = Inputs present
Bit 1 = Outputs present
0x80202023:
WAGO-I/O-SYSTEM 750