Rockwell Automation 1791-XXXX Discrete I/O AC and DC Block I/O Input and Output Modules User Manual
Page 63
Configuring Your Block I/O for PLC
Family Programmable Controllers
Chapter 4
4-6
Figure 4.3
Input/Output Image Table Usage Example for One Starting I/O Group for
16 Output Modules (cat. no. 1791Ć0A16, Ć0B16)
11 10
110
111
010
011
Starting
I/O
Group
0
Block Data
Block Data
Input Image
Output Image
Type of I/O
I/O Rack Number
I/O Group Number
I/O Bit
0 1 0 00
1 = Input
0 = Output
PLCĆ2 Example
10838ĆI
Type of I/O
I/O Rack Number
I/O Group Number
I/O Bit
O 1 0 00
I = Input
O = Output
PLCĆ3, PLCĆ5, PLCĆ5/250 Example
11 10
7
6
5
4
3
2
1 0
16 15 14 13 12 11 10
17
Reserved
Reserved
Reserved
Figure 4.4
Input/Output Image Table Usage Example for One Starting I/O Group with
16 Input Modules (cat. no. 1791Ć16A0, Ć16B0)
11 10
110
111
010
011
Starting
I/O
Group
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
PLCĆ2 Example
10838ĆI
Type of I/O
I/O Rack Number
I/O Group Number
I/O Bit
I 1 0 00
I = Input
O = Output
PLCĆ3, PLCĆ5, PLCĆ5/250 Example
7
6
5
4
3
2
1 0
16 15 14 13 12 11 10
17
Reserved
Reserved
Reserved
Figure 4.5
Input/Output Image Table Usage Example for One Starting I/O Group for
8 Input/8 Output Modules (cat. no. 1791Ć8AC, Ć8BC, Ć8AR, Ć8BR)
11 10
110
111
010
011
Starting
I/O
Group
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
PLCĆ2 Example
10838ĆI
Type of I/O
I/O Rack Number
I/O Group Number
I/O Bit
I 1 0 00
I = Input
O = Output
PLCĆ3, PLCĆ5, PLCĆ5/250 Example
11 10
7 6
5 4
3 2
1
Reserved
0
7
6 5
4 3
2 1 0
Reserved
Reserved
Reserved