Process Data Architecture; Basic Structure - WAGO -I/O-SYSTEM 750 Manual

80 Function Description
7.2

Process Data Architecture

7.2.1

Basic Structure

After switching on, the fieldbus controller identifies all I/O modules connected
with the node that send or receive data (data width/bit width > 0).
In a node can consist of a mixed arrangement of analog input/analog output
modules and digital input/digital output modules and special modules.
Up to 250 I/O modules can be connected with coupler module and end
module.
Using the bus extension coupler module 750-628 and bus extension end module
750-627 for local bus extension it is possible to connect up to 250 I/O modules to
the Media Redundancy ETHERNET Controller.
Additional Information
For the number of input and output bits or bytes of the individual I/O modules,
refer to the corresponding description of the I/O modules.
The controller creates an internal local process image on the basis of the data
width, the type of I/O module and the position of the module in the node. This
process image is broken down into an input and an output data range.
The data of the digital I/O modules is bit-oriented; i.e., digital data is sent bit by
bit. Analog I/O modules represent the group of byte-oriented modules – data is
sent byte by byte.
Counter modules or angle and distance measurement modules, for example, are
included in this group of modules.
For both, the local input and output process image, the I/O module data is stored
in the corresponding process image depending on the order in which the
modules are connected to the fieldbus controller.
Manual
1.5.0
750-882 Media Redundancy ETHERNET Controller
WAGO-I/O-SYSTEM 750