WAGO I/O-SYSTEM 750 Manual page 38

38 • I/O Modules
Special Modules
In doing so, the slaves only send "excerpts" of their process data to the master.
The size of these "excerpts" is determined by "cutoff" in the configuration
mode. The command "cutoff" is symmetrical for the data stream entering and
exiting the master. The current data to be read and written, which are assigned
slots in the master's process image, remain (see Figure 11).
Figure 11: Process image mapping between master and slaves
The following example (see Table 16) shows that both slots in the process im-
age not occupied by slaves (see slot 1 and 4) as well as slots that are not visi-
ble due to a "cutoff" of 0 (see slot 4) can be visible. A "cutoff" of 0 is inde-
pendent of whether a device has been set up for the slot or not.
Table 16: Example of a slot configuration
Slot
1
2
3
4
Slave A Slave B
Master Slot1 Slot 2
Cut off by cutoff, is not transmitted
Slave
-
"Pump"
"Valve"
-
Slave C
Slot 3 Slot 4 Slot 5 Slot 6
Cutoff
4
6
10
0
Slave X
... ...
Process image
...
Radio transmission
(without control/status byte )
...
Offset
0
4
10
20
WAGO-I/O-SYSTEM 750
I/O Modules
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