WAGO-I/O-SYSTEM 750
Function Description 81
750-325 CC-Link Fieldbus Coupler
Manual
Version 2.0.1
7.3
Data Exchange
The CC-Link Fieldbus Coupler is essentially equipped with two interfaces for data
exchange:
•
the interface to the fieldbus (Master)
•
the interface to the I/O modules.
Data exchange takes place between the fieldbus master and the I/O modules.
Exchange of process data takes place with CC-Link Fieldbus Coupler using the
CC-Link protocol.
After mapping the I/O data from the I/O modules to the local process image, the
fieldbus coupler cyclically transfers the digital input data from the process image
to the Remote I/O area and the analog input data to the Remote Register area. In
the same way, the digital output data from the Remote I/O area and the analog
output data from the Remote Register area are transferred to the process image.
7.3.1
Memory Space
Figure 40: 750-325750-325Memory Areas and Data Exchange for a Fieldbus Coupler
The fieldbus coupler process image contains the physical data for the
I/O modules. These have a value of 0 ... 255.
1
From the fieldbus side, the input module data can be read via the CC-Link
address areas RX and RWr.
2
It is also possible to write data to the output modules from the fieldbus side
via the CC-Link address areas RY and RWw.