Data Exchange Between Plc Functionality (Cpu) And I/O Modules - WAGO 750 Series Manual

3.1.6.5 Data Exchange between PLC Functionality (CPU) and I/O Modules

Through absolute addresses, the PLC functionality of the controller can
directly address the I/O module data.
The PFC addresses the input data with absolute addresses. The data can then
be processed, internally in the controller, through the IEC 61131-3 program,
whereby the flags are filed in a permanent memory area. Following this, the
linking results can be directly written in the output data via absolute
addressing.
Fig. 3-10: Data exchange between PLC functionality (CPU) and I/O modules
WAGO-I/O-SYSTEM 750
ETHERNET TCP/IP
Inputs
I/O modules
%IW0 %IW512
PII
%IW255 %IW1275
Inputs
PLC functionality (CPU)
Programmable Fieldbus Controller
Fieldbus Controller 750-841
Outputs
750-4xx....6xx
%QW0 %QW512
PIO
%QW255
%QW1275
Outputs
• 75
Data Exchange
PII = Process Input
Image
PIO = Process Output
Image
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