1
Starting & Stopping Motors
Pico Pico LAB#4
2
• 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:What we are going to do:
3
Pico Overview, Features Pico Overview, Features
1. Incoming Power connection
2. Inputs connections
3. Keypad
4. Communication Cable, Memory module interface cover
5. Outputs connections
6. LCD Display
7. Write-On Surface
21
3
4
5
7
6
4
Pico Overview, Operating ButtonsPico 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
21
3
4
5
5
Pico Overview, Circuit Diagram SymbolsPico Overview, Circuit Diagram Symbols
1. Input Field
2. Output Coil Field
Circuit 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
2
1
P1-------------[Q1
I 2--I 3-------[Q2
-Q2-
Q1--Q2-------[Q3
6
12-Point Status Display12-Point Status Display
Real Time Clock•Day of the week•Time
Input StatusOFF/ ON
Output StatusOFF/ ON
Mode•RUN/STOP
I12345678 P
SU
12:00
Q1234 STOP
7
Creating a new ProgramCreating a new Program
1. Change Mode– The PICO must be in the Stop mode
to delete the resident program. – From the “Status Display” screen
Press “OK” to display next menu screen.
– If this screen is displaying “RUN” The PICO is in “STOP” mode. Proceed to next page and delete program
– If this screen is displaying “STOP” The PICO is in “RUN” mode continue with next step
– Press “Down” arrow once to highlight “STOP”
– Select “STOP” by pressing the “Ok” key when “STOP” is flashing The display will change to “RUN” The PICO is now in the Stop mode
Note – left/right arrows: Move cursor– up/down arrows: Change
values– The “…” after a menu listing
refers to a second level of menus.
PROGRAM...
STOP
PARAMETER
SET CLOCK...
I12345678
TH
12:00
Q1234 RUN
PROGRAM...
RUN
PARAMETER
SET CLOCK...
8
Delete existing ProgramDelete existing Program
2. Delete Program– Press “Up” arrow once to highlight
“Program”– Select “PROGRAM” by pressing
the “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...
RUN
PARAMETER
SET CLOCK...
DELETE ?PROGRAM
DELETE PROG
PROGRAM...
RUN
PARAMETER
SET CLOCK...
9
Setting Day/TimeSetting Day/Time
3. Setting Day / Time– Press “Down” arrow three times to
highlight “SET CLOCK...” – Press “Ok” to select “ SET
CLOCK…”– Press “Ok” to edit “SET CLOCK”
SET CLOCK
SUMMER TIME
PROGRAM...
RUN
PARAMETER
SET CLOCK...
PROGRAM...
RUN
PARAMETER
SET CLOCK...
WINTER TIME
DAY : SU
TIME : 12:00
10
Setting Day/TimeSetting 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
PROGRAM
RUN
PARAMETER
SET CLOCK
SET CLOCK
SUMMER TIME
WINTER TIME
DAY :SU
TIME :12:00
WINTER TIME
DAY : SU
TIME : 12:00
11
Enable the Cursor Push ButtonEnable the Cursor Push Button
5.Enable cursor buttons– From the “Status Display” screen
press the “Del” and “Alt” keys simultaneously
– Press “Down” arrow to highlight the “SYSTEM” Menu
– Press “Ok” to select– Press “Down” arrow to select
“P ON” flashing– Press “Ok” to enable push buttons
“P OFF” is flashing. Push buttons are now enabled
– Press “Esc” twice to exit to “Status Display” screen
Note: Once the cursor push buttons are enabled the user must have logic in the program addressed to the pushbuttons in order for the “P” to be displayed in the Status Screen.
PASSWORD…
SYSTEM
GB D F E I…
I12345678
SU
12:00
Q1234 STOP
DEBOUNCE OFF
P ON
MODE: STOP
RETENTION ON
DEBOUNCE OFF
P OFF
MODE: STOP
RETENTION ON
12
Creating Ladder LogicCreating Ladder Logic
6.Create a New Program– From the “Status Display” screen
press “OK” to display next 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
PROGRAM…
RUN
PARAMETER
SET CLOCK…
I12345678
SU
12:00
Q1234 STOP
PROGRAM
DELETE PROG
13
Creating the 1st Rung of Ladder LogicCreating the 1st Rung of Ladder Logic
Program rung 1 :
6.Add I/O instructions– Press “Ok” to insert input– Press “UP” arrow once to select
the “P” input– Press “Ok” to accept the input “P” – 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.
P1-------------[Q1
P1 P1------------- P1------------[Q1
P1-----------[Q1
14
P1-------------[Q1
P2
Program this 2nd rung:
7.Add Input instructions– Press “Ok” to insert input– Press “UP” arrow once to select
the “P” input– Press “Alt” to select break contact
function (Normally Closed). Press “Ok” to accept
– Press “UP” arrow to select the input address “2”
– Press “Ok” to accept input “P2”– Press “Ok” to select the next input– Press “UP” once to select “P”– Press “OK” to accept “P” – Press “UP” arrow to select the
input address of “3” – Press “Ok” to accept input “P3”– Press “Alt” to activate the draw
function– Press “Right” arrow once to draw
the connection– Press “Alt” to exit the draw
function
P1-------------[Q1
P2—P3
P1-------------[Q1
P2--P 3-------
Creating the 2nd Rung of Ladder LogicCreating the 2nd Rung of Ladder Logic
8
P1-------------[Q1
P2--P3--------[Q2
-Q2-
P1-------------[Q1
P2--P3--------[Q2
-Q2-
15
Creating the 2nd Rung of Ladder Logic, cont.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 “P3”– 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
8
P1-------------[Q1
P2---P3-------[Q2
P1-------------[Q1
P2--P3--------[Q2
-Q2-
P1-------------[Q1
P2---P3-------[Q2
-Q2-
P1-------------[Q1
P2--P3--------[Q2
-Q2-
P1-------------[Q1
P2--P3--------[Q2
-Q2-
16
P1-------------[Q1
P2--P3--------[Q2
-Q2-
Creating the 2nd Rung of Ladder Logic, cont.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
8
P1-------------[Q1
P2--P3 -------[Q2
-Q2-
P1-------------[Q1
P2--P3--------[Q2
-Q2-
P1-------------[Q1
P2--P3--------[Q2
-Q2-
P1-------------[Q1
P2--P3--------[Q2
-Q2-
17
P1-------------[Q1
P2--P3--------[Q2
-Q2-
Q1--Q2-------
Creating the 3rd Rung of Ladder Logic, cont.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
8
P1-------------[Q1
P2--P3--------[Q2
-Q2-
Q1--Q2-------[Q3
P1-------------[Q1
P2--P3--------[Q2
-Q2-
Q1
P1-------------[Q1
P2--P3--------[Q2
-Q2-
Q1--Q2
P1-------------[Q1
P2--P3--------[Q2
-Q2-
Q1--Q2-------[Q3
18
Creating the 3rd Rung of Ladder Logic, cont.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”
8
P1-------------[Q1
P2--P3--------[Q2
-Q2-
Q1--Q2-------[Q3 P1-------------[Q1
P2--P3--------[Q2
-Q2-
Q1--Q2-------[Q3
P1-------------[Q1
P2--P3--------[Q2
-Q2-
Q1--Q2-------[Q3
19
Monitor the program.Monitor the program.
13. Change Mode– Press “Esc” to exit back to the 2nd
“Menu” screen– Press “Esc” to exit back to the 1st
“Menu” screen– Press “Down” arrow to Highlight
(Flashing) “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 and verify the “P” in the upper right corner of the screen.
14. Monitor the Ladder– The P-buttons are only recognized
as switch contacts in the Status menu and not in any other display
– Press “OK” twice to enter the ladder program
PROGRAM…
RUN
PARAMETER
SET CLOCK…
PROGRAM
DELETE PROG
I12345678 P
TH
12:00
Q1234 RUN
P1-------------[Q1
P2--P3--------[Q2
-Q2-
Q1--Q2-------[Q3
20
Monitor the ProgramMonitor the Program
PROGRAM OPERATION
– RUNG 0-Press cursor pushbutton # P1 output #Q1 will turn ON release the pushbutton and output #Q1 will turn OFF. This output is dependent on the input condition. Verify this from the status screen. The “P” will display “P1” and the “Q1” will enable.
– RUNG 1-Press cursor pushbutton # P3 (start button) output # Q2 will latch ON. Press input pushbutton # P2 (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.
P1
P4
P3
P2
I12345678 P1
TH
12:00
Q1234 RUN
I12345678 P3
TH
12:00
Q1234 RUN
I12345678 P1
TH
12:00
Q1234 RUN
I12345678 P1
TH
12:00
Q1234 RUN