Memory Areas; Figure 41: Memory Areas And Data Exchange - WAGO -I/O-SYSTEM 750 Manual

88 Function Description
7.3.1

Memory Areas

Figure 41: Memory areas and data exchange

The controller process image contains the physical data for the bus modules.
These have a value of 0 ... 255 and word 512 ... 1275.

The input module data can be read by the CPU and by the fieldbus side.

Likewise, data can be written to the output modules from the CPU and the
fieldbus side.
The MODBUS PFC variables are stored in each of the memory areas for word
256 ... 511 between these sides.

The MODBUS-PFC input variables are written to the input memory area
from the fieldbus side and read in by the CPU for processing.

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
master.
The memory area for word 1276 ... 1531 for the EtherNet/IP PFC variables is
adjacent to the physical I/O module data.
Manual
1.5.0
750-882 Media Redundancy ETHERNET Controller
WAGO-I/O-SYSTEM 750