Rockwell Automation 1791-IOBB USER MANUAL - Manual (Page 25)

Configuring Your Block I/O for PLC
Family Programmable Controllers
Chapter 4
4Ć5
Figure 4.4
I/O Image Table for One Assigned Rack Number with 1791-IOBB
0 17
Output Image
Input Image
Reserved
Reserved
Reserved
Reserved
Reserved
0
1
2
3
4
5
6
7
Reserved
Reserved
Reserved
7 10
0 17
Reserved
Reserved
Reserved
Reserved
Reserved
0
1
2
3
4
5
6
7
Reserved
Reserved
Reserved
7 10
1 I/O Rack
For 1791-IOBB - 11-0 input and 5-0 output image bits
1791-IOBB 1791-IOBB 1791-IOBB 1791-IOBB
Figure 4.5
Input Table Usage Example for One Starting I/O Group with 1791-IOBB
11 10 7 6
Block Data
112
113
012
013
11 10 7 6 5 4 3 2 1
Reserved
Reserved
5 4 3 2 1
Reserved
Reserved
0
0
Starting
I/O Group
2
Block Data
Input Image
Output Image
Type of I/O
I/O Rack Number I/O Group Number
I/O Bit
1 1 2 00
1 = Input
0 = Output
Example