WAGO-I/O-SYSTEM 750
Function Description
97
750-880, 750-880/025-000 ETHERNET Programmable Fieldbus Controller
Manual
Version 1.0.1
Pos: 75.41 /Serie 750 (WAGO-I/O-SYSTEM)/Funktionsbeschreibung/Datenaustausch/Datenaustausch - Datenaustausch SPS-Funktionalität (CPU) und Busklemmen @ 6\mod_1256049896812_21.doc @ 43313 @ 3 @ 1
7.3.4
Data Exchange between PLC Function (CPU) and I/O
Modules
The PLC function (CPU) of the PFC uses direct addresses to access the I/O
module data.
The PFC uses absolute addresses to reference the input data. The data can then be
processed internally in the controller using the IEC-61131-3 program.
Flags are stored in a non-volatile memory area in this process. The results of
linking can then be written directly to the output data employing absolute
addressing.
%
I
W0
%QW0
%QW
255
%
I
W
255
%
I
W
512
%
I
W
1275
%QW
512
%QW
1275
PII = Process Input
Image
PIO = Process Output
Image
I
n
puts
O
utputs
I
/O
m
o
dules
750-4xx....6xx
PII
PI
O
PL
C
fu
n
cti
on
ality
(C
P
U
)
I
n
puts
O
utputs
P
rogr
ammable Fieldbus
Con
t
ro
lle
r
Figure 44: Data exchange between PLC function (CPU) of the PFC and the I/O modules
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