Rockwell Automation 1772-LP3 PLC - 2/30 Programmable Controller Programming and Operations Manual - Manual (Page 49)

Data Table
Chapter 3
3Ć22
Figure 3.7
Relationship of Word Address to Hardware
17 16 15 14 13 12 11 10 07 06 05 04 03 02 01 00
1 0 0 1 0 1
1
1 1 1 1 0
0
0 0 1 0 0 012
8
1 0 0 0 1 0 1 1 1 1 0 0 0 0
3ĆDigit Word Addresses
Output Module in
Assigned I/O Rack No. 1,
I/O Group No. 2
Output Terminal
012/06
010
8
Energized
Output
Input Image Table
BIT 113/12
1 = ON
0 = OFF
UserĆProgrammed Rung
Input Terminal
113/12
Input Module in
I/O Rack No. 1,
I/O Group No. 3
2-Digit Bit and
Terminal Address
Output Image Table
BIT 012/06
1 = ON
0 = OFF
012
( ) | ą|
Closed
Input
017
8
113
8
110
8
177
8
06 12
113 Instruction
Intensified
When Enabled
When the input device wired to terminal 113/12 opens, the input module
senses no voltage. The Off condition is reflected in the input image table
bit 113/12. During the program scan, the processor examines bit 113/12
for an On (1) condition. Since the bit is off (0), logic continuity is not
established, the rung is false and the output instruction is not intensified.
The processor then sets output image table bit 012/06 to off (0). In the next
I/O scan, it turns off terminal 012/06 and the output device wired to this
terminal is turned off.