Basic Circuits - Allen-Bradley PicoTM Controller 1760 Product Manual

Basic Circuits

Significance of Logic Values
Value Function
"0" Make contact open, break contact closed, relay coil not energized
"1" Make contact closed, break contact open, relay coil energized
Negation (NOR)
I1 Q1
1 0
0 1
Permanent Contact (Unconditional Rung)
--- Q1
1 1
Flip-Flop Output
I1 State Q1 Q1
0 0 0
0 to 0 1
1
0 1 1
0 to 1 0
1
Drawing a Circuit with Pico
I1---------{Q1
-----------{Q1
I1---------
Publication 1760-GR001C-EN-P - April 2005
2-23
Q1