Rockwell Automation 1791-IOBB USER MANUAL - Manual (Page 23)

Configuring Your Block I/O for PLC
Family Programmable Controllers
Chapter 3
3Ć4
Figure 3.2
I/O Image Table for One Assigned Rack Number with 1791-IOBA/B
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
Rack 1
For 1791-IOBA/B - 7-0 input and 7-0 output image bits
1791-IOBA/B 1791-IOBA/B 1791-IOBA/B 1791-IOBA/B
10837-I
Figure 3.3
Input Table Usage Example for One Starting I/O Group with 1791-IOBA/B
11 10
11 10 7 6 5 4 3 2 1
Reserved
Reserved
110
111
010
011
Starting
I/O Group
0
7 6 5 4 3 2 1
Reserved
Reserved
0
0
Block Data
Block Data
Input Image
Output Image
Type of I/O
I/O Rack Number I/O Group Number
I/O Bit
1 1 0 00
1 = Input
0 = Output
PLC-2 Example
10838-I
Type of I/O
I/O Rack Number I/O Group Number
I/O Bit
I 1 0 00
I = Input
O = Output
PLC-3, PLC-5, PLC-5/250 Example