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Pico Pico LAB#1. Starting & Stopping Motors. What we are going to do:. Program a series of three basic ladder logic rungs. These basic rungs are the most common rungs found in every ladder program. Each of these rungs will help you to “Frame” how a Pico is programmed, and how they operate. - PowerPoint PPT Presentation
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Starting & Stopping Motors
Pico Pico LAB#1
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• Program a series of three basic ladder logic rungs. These basic rungs are the most common rungs found in every ladder program.
• Each of these rungs will help you to “Frame” how a Pico is programmed, and how they operate.
What we are going to do:
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Pico Overview, Features
1. Incoming Power connection2. Inputs connections3. Keypad4. Communication Cable,
Memory module interface cover
5. Outputs connections6. LCD Display7. Write-On Surface
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Pico Overview, Operating Buttons
1.Del- Delete object in the circuit diagram
2.Alt- Special functions in the circuit diagram
3.Cursor Buttons- – Move cursor – Select menu items– Choose contact numbers, values,
times, etc– P-button function (when enabled)
• Left arrow, Input P1• Up arrow, Input P2• Right arrow, Input P3• Down arrow, Input P4
4.Ok- Next menu level, store your entry
5.Esc- Previous menu level, cancel your entry
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Pico Overview, Circuit Diagram Symbols
1. Input Field2. Output Coil FieldCircuit Diagram Symbols
– P- Cursor button as input – I - Contact for input – Q - Contact for output– M - Contact for internal marker relay – T - Contact for timer relay – C - Contact for counter relay – - Contact for real time clock contact – A - Analog comparator contact
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I 1-------------[Q1
I 2--I 3-------[Q2
-Q2-
Q1--Q2-------[Q3
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12-Point Status Display
Real Time Clock•Day of the week•Time
Input StatusOFF/ON
Output StatusOFF/ON
Mode•RUN/STOP
I12345678 SU 12:00Q1234 STOP
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Delete existing Program
1. Change Mode– The PICO must be in the Stop mode
to delete the resident program if one exists in the PICO
– From the “Status Display” screen Press “OK” to display next menu screen.
– If this screen is displaying “RUN” The PICO is already in the “STOP” mode. Proceed to next page to delete the resident program
– If this screen is displaying “STOP” The PICO is in “RUN” mode continue with next step
– Press “Down” arrow once to highlight “STOP” the “STOP” is flashing
– Press “Ok” key the display will change to “RUN” The PICO is now in the “STOP” mode. You are now ready to delete the program in the PICO
Note – left/right arrows: Move cursor– up/down arrows: Change values– The “…” after a menu listing refers
to a second level of menus.
PROGRAM...STOPPARAMETERSET CLOCK...
I12345678 TH 12:00Q1234 RUN
PROGRAM...RUNPARAMETERSET CLOCK...
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Delete existing Program
2. Delete Program– From this screen press the “Up”
arrow to select “PROGRAM…”– Press “Ok” key when
“PROGRAM…” is flashing.– Press “Down” arrow to select
“DELETE PROG”– Press “Ok” to accept “DELETE
PROG”– Press “Ok” to accept “DELETE?”– Press “Esc” to exit back one menu
screen
PROGRAM...RUNPARAMETERSET CLOCK...
DELETE ?PROGRAMDELETE PROG
PROGRAM...RUNPARAMETERSET CLOCK...
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Setting Day/Time
3. Setting Day / Time– Press “Down” arrow three times to
highlight “SET CLOCK...” – Press “Ok” to select “CLOCK
SET…”– Press “Ok” to edit “CLOCK SET”
SET CLOCKSUMMER TIME
PROGRAM...RUNPARAMETERSET CLOCK...
PROGRAM...RUNPARAMETERSET CLOCK...
WINTER TIMEDAY : SUTIME : 12:00
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Setting Day/Time
4. Setting Day / Time– Press “Left” or “Right” arrow once
to move to the Day of week– Press “Up” or “Down” arrow to
select the Day of week– Press “Left” or “Right” arrow to
move to the Time of day. Time of day is displayed in military
– Press “Up” or “Down” arrow to select correct Time of day
– Press “Ok” to accept edits– Press “Ok” to exit “SET CLOCK”
display– Press “Esc” twice to exit back to
“Status Display” screen
PROGRAMRUNPARAMETERSET CLOCK
SET CLOCKSUMMER TIME
WINTER TIMEDAY :SUTIME :12:00
WINTER TIMEDAY : SUTIME : 12:00
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Creating Ladder Logic
5.Create a New Program– From the “Status Display” screen
press “OK” to display next menu screen
– Select “PROGRAM…” by pressing the “Ok” key when “PROGRAM” is flashing
– Select “PROGRAM” by pressing the “Ok” key when “PROGRAM” is flashing
– You are now ready to start programming the PICO
PROGRAMRUNPARAMETERSET CLOCK
I12345678 SU 12:00Q1234 STOP
PROGRAMDELETE PROG
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Creating the 1st Rung of Ladder Logic
Program rung 1 :
6.Add I/O instructions– Press “Ok” to insert input– Press “Ok” to accept the input “I” – Press “Ok” to accept the input
address “1”– Press “Alt” to activate the draw
function– Press “Right” arrow twice to draw
the connection– Press “Alt” to exit the draw
function– Press “Ok” to insert output– Press “Ok” to accept output “Q”– Press “Ok” to accept output
address “1”– Press “Ok” to accept the output.
This will start the next rung.
I 1-------------[Q1
I 1 I 1------------- I 1-------------[Q1
I 1-----------[Q1
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I 1-------------[Q1
I 2
Program this 2nd rung:
7.Add Input instructions– Press “Ok” to insert input “I”– Press “Alt” to select break contact
function (normally closed contact). Press “Ok”
– Press “UP” arrow to select the input address “2”
– Press “Ok” to accept input “I2”– Press “Ok” to select the input
instruction “I”. Press “Ok” to accept instruction type
– Press “UP” arrow to select the input address of “3”
– Press “Ok” to accept input “I3”– Press “Alt” to activate the draw
function– Press “Right” arrow once to draw
the connection– Press “Alt” to exit the draw
function
I 1-------------[Q1
I 2--I 3
I 1-------------[Q1
I 2--I 3-------
Creating the 2nd Rung of Ladder Logic
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I 1-------------[Q1
I 2--I 3-------[Q2
-Q2-
I 1-------------[Q1
I 2--I 3-------[Q2
-Q2-
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Creating the 2nd Rung of Ladder Logic, cont.
Program this 2nd rung:
8.Add Output instruction– Press “Ok” to insert output– Press “Ok” to accept output “Q”– Press “Up” arrow to select “2”– Press “Ok” to accept output “Q2”.
This will start the next rung
9.Add Branch– Press “Right” arrow once to move
under the “I3”– Press “Ok” to select input– Press “Down” once to select “Q”– Press “Ok” to accept “Q”– Press “Up” arrow to select the
input address of “2” – Press “Ok” to accept input “Q2”.– Press “Alt” to activate the draw
function– Press “Up” arrow once to draw
branch
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I 1-------------[Q1
I 2---I 3------[Q2
I 1-------------[Q1
I 2--I 3-------[Q2
-Q2-
I 1-------------[Q1
I 2---I3-------[Q2
-Q2-
I 1-------------[Q1
I 2--I 3-------[Q2
-Q2-
I 1-------------[Q1
I 2--I 3-------[Q2
-Q2-
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I 1-------------[Q1
I 2--I 3-------[Q2
-Q2-
Creating the 2nd Rung of Ladder Logic, cont.
Program this 2nd rung:
10.Add Branch– Press ”Left” arrow once to move to
the left side of “I3”– Press “Alt” to activate the draw
function– Press “Down” arrow once to draw
branch– Press “Alt” to exit the draw
function– Press “Left”arrow once and
“Down” arrow once. This will start the new rung
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I 1-------------[Q1
I 2--I 3-------[Q2
-Q2-
I 1-------------[Q1
I 2--I 3-------[Q2
-Q2-
I 1-------------[Q1
I 2--I 3-------[Q2
-Q2-
I 1-------------[Q1
I 2--I 3-------[Q2
-Q2-
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I 1-------------[Q1
I 2--I 3-------[Q2
-Q2-
Q1--Q2-------
Creating the 3rd Rung of Ladder Logic, cont.
Program this 3rd rung:
11. Add Input instructions– Press “Ok” to insert input– Press “Down” arrow to select “Q”– Press “Ok” to accept input “Q”– Press “Ok” to accept the input
address of “Q1”– Press “Ok” to insert 2nd input– Press “Down” arrow to select “Q”– Press “Ok” to accept input “Q” – Press “Up” arrow to select “2”– Press “Ok” to accept the input
address of “Q2”– Press “Alt” to activate the draw
function– Press “Right” arrow once to draw
connection– Press “Alt” to exit draw function
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I 1-------------[Q1
I 2--I 3-------[Q2
-Q2-
Q1--Q2-------[Q3
I 1-------------[Q1
I 2--I 3-------[Q2
-Q2-
Q1
I 1-------------[Q1
I 2--I 3-------[Q2
-Q2-
Q1--Q2
I 1-------------[Q1
I 2--I 3-------[Q2
-Q2-
Q1--Q2-------[Q3
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Creating the 3rd Rung of Ladder Logic, cont.
Program this 3rd rung:
12. Add Output instruction– Press “Ok” to insert output– Press “Ok” to accept output “Q”– Press “Up” arrow to select “3”– Press “Ok” to accept output
address “Q3”
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I 1-------------[Q1
I 2--I 3-------[Q2
-Q2-
Q1--Q2-------[Q3 I 1-------------[Q1
I 2--I 3-------[Q2
-Q2-
Q1--Q2-------[Q3
I 1-------------[Q1
I 2--I 3-------[Q2
-Q2-
Q1--Q2-------[Q3
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Monitor the program.
13. Change Mode– Press “Esc” twice to exit back to
the 1st “MENU DISPLAY” screen– Press “Down” arrow to Highlight
“RUN” – Press “Ok” to accept the RUN
mode– The PICO is now running– Press “Esc” to exit back to the
“Status Display. In this screen you can monitor the I/O
14. Monitor the Ladder– Press “OK” twice to enter the
ladder program
PROGRAMRUNPARAMETERSET CLOCK
PROGRAMDELETE PROG
I12345678 TH 12:00Q1234 RUN
I 1-------------[Q1
I 2--I 3-------[Q2
-Q2-
Q1--Q2-------[Q3
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Monitor the Program
PROGRAM OPERATION
– RUNG 0- Because the input simulators have latching pushbuttons. Press input pushbutton # I1 so as not to latch the pushbutton, output #Q1 will turn ON release the pushbutton and output #Q1 will turn OFF. This output is dependent on the input condition.
– RUNG 1-Press input pushbutton # I3 (start button) so as not to latch the pushbutton, output # Q2 will latch ON. Lightly press input pushbutton # I2 (stop button) will turn OFF output #2. This is a simple motor control circuit. This circuit utilizes both AND and OR placement of instructions.
– RUNG 2- The two inputs on rung 2 are conditions of rungs 0 and 1. The output (output #Q3) is a condition of the two inputs. So each outputs of rungs 0 and 1 must be true to turn on output #Q3. This circuit utilizes AND placement of instructions.
I 1-------------[Q1
I 2--I 3-------[Q2
-Q2-
Q1--Q2-------[Q3
