User manual

Publication 1760-UM001A-EN-P

Drawing a Circuit Diagram with Pico 4-39

Example Programs

The Pico circuit diagram is created using ladder logic. This section contains a few

programs intended to demonstrate possibilities for your own circuit diagrams.

The values in the logic table have the following meanings for contacts:

• 0 = make contact open, break contact closed

• 1 = make contact closed, break contact open

For relay coils Qx:

• 0 = coil not energized

• 1 = coil energized

Negation

Negation means that the contact opens, rather than closes, when it is actuated

(NOT circuit).

In the Pico circuit diagram, press the Alt button to

toggle contact I1 between break and make contact.

Logic Table

Permanent Contact (Unconditional Rung)

To energize a relay coil continuously, make a connection

of all contact fields from the coil to the leftmost

position.

Logic Table

Series Connection

Q1 is controlled by a series circuit consisting of three

make contacts (AND circuit).

Q2 is controlled by a series circuit consisting of three

break contacts.

In the Pico circuit diagram, you can connect up to three

make or break contacts in series within a circuit connection. Use “M” marker relays

if you need to connect more than three make contacts in series. (see page 4-8)

I1 Q1

--- Q1

I1----------{Q1

------------{Q1

I1-I2-I3-{Q1

I1-I2-I3-{Q2