Rockwell Automation 1336-GM1 Remote I/O Communications Module - Manual (Page 59)

Using Block Transfer Messages 5–7
Calculating the Rack, Group, Slot Address
The Rack, Group, Slot address for a block transfer is calculated as
shown in the table below.
This value is needed as part of the data file that is copied to the
M0-file block transfer buffer in the 1747-SN RIO Scanner module.
Example Logix5550 Block
Transfers Figure 5.6 is an example of block transfer programming from a
Logix5550 controller to a Remote I/O communications module.
Rack, Group, Slot Address Decimal Value
0,0,0 0
1,0,0 100
1,2,0 120
2,4,0 240