Rockwell Automation 1760-xxxx Pico Controller User Manual - Manual (Page 117)

Publication 1760-UM001D-EN-P - September 2005
Draw a Circuit Diagram with Pico 4-57
Exclusive OR Circuit
This circuit is made in Pico using two series connections that are
combined to form a parallel connection (XOR).
XOR means that this circuit is an ‘Exclusive OR circuit’. Only if one
contact switches, can the coil be energized.
Motor Start/Stop Circuit
A combination of a series and parallel connection is used to wire a
latching circuit.
Latching is established by contact Q1 which is parallel to I1. If I1 is
actuated and reopened, the current flows via contact Q1 until I2 is
actuated.
1 0 1 1 1
0 1 1 1 1
1 1 1 1 0
Logic Table
I1 I2 Q1
0 0 0
1 0 1
0 1 1
1 1 0
Logic Table
I1 Start I2 Stop Contact Q1 Coil Q1 Motor
0 0 0 0
0 1 0 0
1 1 1 1
0 1 1 1
1 0 0 0
Logic Table
I1 I2 I3 Q1 Q2
I1-I2-------{Q1
I1-I2
I1-I2-------{Q1
Q1
S1 make contact on I1
S2 break contact on I2