WAGO-I/O-SYSTEM 750
Function Description
73
750-806 Fieldbus Controller DeviceNet
TM
Manual
Version 2.0.0
Figure 39: Memory Areas
In the memory space word 0 … 255, the fieldbus controller process image
contains the physical data of the bus modules.
1
The input module data can be read by the CPU and by the fieldbus side.
2
In the same manner, writing on the output modules is possible from the
CPU and from the fieldbus side. The value of the fieldbus master is put out
on the output while writing on an output.
The PFC variables (fieldbus variables) are filed in the memory space Word
256 … 511 of the process image.
3
The PFC input variables are written to the input memory area from the
fieldbus side and read in by the CPU for processing.
4
The variables processed by the CPU using the IEC-61131-3 program are
places in the output memory area, where they can be read out by the
fieldbus master.
