Rockwell Automation 1760-xxxx Pico Controller User Manual - Manual (Page 68)

Publication 1760-UM001D-EN-P - September 2005
4-8 Draw a Circuit Diagram with Pico
Work with Contacts and
Relays In Pico circuit diagrams, the switches, buttons, and relays of
conventional relay logic are connected using input contacts and relay
coils.
First, specify which input and output terminals you wish to use in
your circuit.
Depending on the model, Pico controllers have 8, 12 or 24 input
terminals and 4, 6, 8, 10 or 16 outputs. The signal states at the input
terminals are recorded in the circuit diagram using input contacts I1 to
I12. In the circuit diagram, the outputs are switched using output
relays Q1 to Q6. The expansion modules can add another 12 inputs
and 6 or 8 outputs. The signal states at the input terminals are
recorded in the circuit diagram as R1 to R12. The outputs are switched
using S1 to S8.
Enter or Modify the Contact or Relay
Define a contact in Pico via its name and number.
A relay is defined by its coil function, name and number.
A full list of all the contacts and relays is given on page 4-4. Enter
mode is used to modify the value of contact fields and coil fields. The
value to be modified will flash. If the field or section is empty, Pico
will enter contact ’I1’ or the coil ’{Q1’.
• Move the cursor using the buttons to a contact or coil field.
• Press Ok to switch to Enter mode.
• Use the left and right arrow keys to select the position you wish
to change, or press Ok to jump to the next position.
• Use the up and down arrow keys to modify the value of the
position
I2----------{Q4
I3
S1
S2
CR1
M1
CR1
Connect S1 to Pico input terminal I2
Connect S2 to Pico input terminal I3
Connect load M1 to Pico output Q4
S1 or S2 switches on M1.
Pico Circuit Diagram
I 2
Contact
Name
Contact
Number
{ Q 4
Coil Function
Relay Name
Relay Number