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EXERCISE
MANUAL INDEX
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There are some samples
of the corresponding Ladder Diagrams on this page, which are available
for all exercises in the Manual.
CHAPTER
1
AN OVERVIEW OF PROGRAMMABLE LOGIC
CONTROLLERS
CHAPTER
2
PLC HARDWARE
COMPONENTS
CHAPTER
3
NUMBER SYSTEMS
AND CODES
CHAPTER
4
FUNDAMENTALS
OF LOGIC
CHAPTER
5
BASICS OF PLC
PROGRAMMING
CHAPTER
6
DEVELOPING FUNDAMENTAL
PLC WIRING DIAGRAMS AND LADDER LOGIC PROGRAMS
CHAPTER
7
PROGRAMMING TIMERS
CHAPTER
8
PROGRAMMING COUNTERS
CHAPTER
9
PROGRAM CONTROL
INSTRUCTIONS
CHAPTER
10
DATA MANIPULATION
INSTRUCTIONS
CHAPTER
1
PROGRAMMABLE LOGIC CONTROLLERS
(PLC?s)
AN OVERVIEW
1-3 Given four NO pushbuttons
(A-B-C-D), write a program that will turn a lamp on if pushbuttons A and
B or C and D are closed. Use the I/0 simulator screen and the following
addresses to simulate the program:
INPUTS
OUTPUT
Pushbutton A - I: 1/0
L1 - O: 1/0
Pushbutton B - I: 1/01
Pushbutton C - I :1/06
Pushbutton D - I :1/07
1 -4 Write a program for
the relay schematic shown.
Use the 1/0 simulator screen
and the following addresses to simulate the program.
INPUTS
OUTPUT
S1 - I: 1/0
L1 -O: 1/0
LS1 - I: 1/1
LS2 - I: 1/6
CHAPTER
2
PLC HARDWARE
COMPONENTS
2-1 Write a program that
will simulate the input module, output module, and data table conditions
for the PLC diagram shown.
Use the I/O simulator
screen and the following addresses to simulate the program:
INPUTS
OUTPUTS
NC Pushbutton - I: 1/4
L1 - O: 1/2
NO Pushbutton - I: 1/7
L2 - O: 1/7
CHAPTER
3
NUMBER SYSTEMS AND
CODES
3-1 Write a program that
will result in the binary number 101 being stored at output word one. Use
the I/O simulator screen and the following addresses to simulate the program:
INPUTS
OUTPUTS
I: 1/0
O: 1/0
I: 1/1
O: 1/1
I: 1/2
O: 1/2
CHAPTER
4
FUNDAMENTALS OF LOGIC
4-4 Write a program for
the relay schematic shown. Use the I/O simulator screen and the following
addresses to simulate the program:
INPUTS
OUTPUT
LS1 - I: 1/0
SOL - O: 1/0
LS2 - I: 1/1
CHAPTER
5
BASICS OF PLC PROGRAMMING
5-3 Write a program that
will implement the ladder logic program shown.
Use the I/O simulator
screen and the following addresses to simulate the program:
INPUTS
OUTPUT
A - I: -1/0
Y - O: 1/0
B - I: -1/1
C - I: -1/6
D - I: -1/7
E - I: 1/2
CHAPTER
6
DEVELOPING FUNDAMENTAL
PLC WIRING DIAGRAMS
AND LADDER LOGIC PROGRAMS
6-1 Write a program that
will implement the hardwired motor control relay schematic shown. Use the
I/O simulator screen and the following addresses to simulate the program:
INPUTS
OUTPUTS
Stop - I: 1/4
F - O: 1/0
Start - I: 1/2
R - O: 1/1
Selector Switch - I: -1/0
(closed for forward)
OLs I:1/5
CHAPTER
7
PROGRAMMING TIMERS
7-1 Write a program that
will simulate the on-delay timer circuit schematic shown. Use the I/O simulator
screen and the following addresses to simulate the program:
INPUT
OUTPUT
TIMER
S1 - I: 1/0
L1 - O: 1/0
TON ? T1
CHAPTER
8
PROGRAMMING COUNTERS
8-2 Write a program that
will implement the following conveyor motor control process:
OPERATIONAL SEQUENCE
- The start button is
pressed to start the conveyor motor.
- Cases move past the
proximity switch and increment the counter's accumulated value.
- After a count of 13,
the conveyor motor stops automatically and the counter?s accumulated value
is reset to 0.
- The conveyor motor can
be stopped and started
manually at any time
without loss of the accumulated
count.
- The accumulated count
of the counter can be reset manually at any time by means of the count
reset button.
- The process is repeated
when the start button is
pressed.
Use the Silo simulator screen
and the following addresses to
simulate the program:
INPUTS
OUTPUT
COUNTER
Start button - I: 1/1
Conveyor Motor - O: 1/0
CTU - C1
Stop button - I: 1/0
Count reset button - I:
1/2
Proximity Switch (NO)
- I: 1/3
8-23 Write a program
to implement the process illustrated. An up-
counter must be programmed
as part of a batch-counting operation to sort parts automatically for quality
control. The counter is installed to divert 1 part out of every 10 for
quality control or inspection process. The circuit operates as follows.
- A start/stop pushbutton
station is used to turn the conveyor motor on and off.
- A proximity sensor counts
the parts as they pass by on the conveyor.
- When 10 is reached,
the counter's output activates the gate solenoid, diverting the part to
the inspection line.
- The gate solenoid is
energized for 2 s, which allows enough time for the part to continue to
the quality control line.
- The gate returns to
its normal position when the 2 s time period ends.
- The counter resets to
zero and continues to accumulate counts.
- A reset pushbutton is
provided to reset the counter manually.
Use the Silo simulator screen
and the following address to simulate the program:
INPUTS
OUTPUTS
Conveyor stop PB - I:
1/0 Conveyor motor
- O: 1/0
Conveyor start PB - I:
1/1 Solenoid - O:
1/0
COUNTER TIMER
CTU - C1 TON - T1
CHAPTER
9
PROGRAM CONTROL INSTRUCTIONS
9-1 A temporary jumper
can be installed in a PLC program in order to force a control ON or OFF
as illustrated below. A dedicated I/O address can be used to operate all
jumpers. Jumpers that are identified in this way are easy to locate in
the program. Simply look for that particular I/O address and you will find
every jumper that is used in the program.
9-1(a) Construct a PSIM
program for the generic ladder logic program shown.
Use the I/O simulator screen
and the following address to simulate the Program:
INPUTS
OUTPUTS
S1 - I: 1/0
PL1 - O: 1/1
S2 - I: 1/1
PL2 - O: 1/2
S3 - I: 1/6
PL3 - O: 1/4
PL4- O: 1/4
CHAPTER
10
DATA MANIPULATION
INSTRUCTIONS
10-6 Write a PSIM program
that will implement the generic adjustable on-delay PLC timer program shown
using data compare instructions.
Use the I/O simulator
screen and the following addresses to simulate the program:
INPUT
OUTPUT
TIMER
PB1 - I: 1/2
PL1 - O: 1/0 TON - T1
SS1 - I: 1/0
INTERNAL RELAYS
O: 2/0 & O: 2/1
End of Sample Exercise Manual
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