beautypg.com

When the input goes false – Rockwell Automation 1747-PT1, D1747NP002 Hand-Held Terminal User Manual

Page 97

background image

Chapter 5
Ladder Program Basics

5–13

When the Input Goes False

0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0

15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0

15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

2

O:0.0

1

Input Data File

O:0

I:0

Output Data File

Ladder Program

Instructions intensified

Output Bit Energized

Input Bit Energized

Scan before input goes false (scan 1999).

I:0.0

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0

15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

2

O:0.0

1

Input Data File

Ladder Program

Output Data File

O:0

I:0

Output Bit Energized

Input Bit De–energized

Instructions are normal
intensity.

First scan after input goes false (scan 2000).

I:0.0

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

2

O:0.0

Input Data File

Ladder Program

Output Data File

O:0

I:0

Output Bit De–energized

Input Bit De–energized

Instructions are normal
intensity

Second scan after input goes false (scan 2001).

1

I:0.0

Input Scan

Program
Scan

Input Scan

Program
Scan

Input Scan

Program
Scan