Rockwell Automation 1772-L8_LW_LWP_LX_LXP,D17726.5.8 User Manual - Manual (Page 99)

Starting Your Processor
Chapter 5
5-17
Figure 5.13 illustrates addressing 4 modules, each with the same I/O group
number, but in the four different racks of a single I/O chassis.
Figure 5.13
Group Address of a Module in Four Different Racks
10337-I
0Ć3 4Ć7 0Ć3 4Ć7 0Ć3 4Ć7 0Ć3 4Ć7
15247
I/O group number
Rack 1 Rack 2 Rack 3 Rack 4
I/O group 1
address
1 1 1
input
rack I/O group
I/O group 1
address
1 2 1
I/O group 1
address
1 3 1
I/O group 1
address
1 4 1
Important: When addressing a block transfer module, it must be
addressed by the lowest group number that it occupies and at slot 0. For
example: a 1-slot block transfer module in rack 1, groups 2 and 3 (slot 2)
would be addressed (by rack-group-slot) at location 120. Be aware that
this module is occupying group 2, slots 0 and 1, and group 3, slots 0 and 1.