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P-SIM 1000 Programmable Logic Controller
- Lesson Details
Testing and Evaluation
Each of the 10 lessons has a "test your knowledge"
section associated with it. There are 8 questions in each of the 10 lessons. At the end of the eighth
question the student may get a summary of the results of the individual test. The summary includes the
score out of 8 as well as the number of attempts per question. The test data is automatically saved to
hard disk. The results may also be saved to a floppy disk. This option is selected by clicking on Quit
from the main menu and selecting SAVE MENU DATA.
After completing all 10 lessons, the student can
get an overall summary of results on all 80 questions. This can be obtained by clicking on the
EVALUATION section under TEST RESULTS from the main menu. The evaluation section is a useful feedback
mechanism as it displays in bar form the number of attempts associated with each question as well as
the overall results. This will help in determining any remedial action.
Test results can be loaded from the floppy disk at
the start of a session. This is done from the TEST RESULTS selection on the main menu.
In addition, test data can be initialized to zero
attempts from the TEST RESULTS selection on the main menu.
Lesson Summary
Lesson 1 - Introduction to the PLC
- Describes the PLC.
- Introduces the various modules and their functions in a typical PLC.
- Describes a typical PLC type of application.
Lesson 2 - Introduction to ladder logic
- Relates a simple electrical circuit and its corresponding relay ladder logic diagram.
- Describes the operation of a relay.
- Introduces concept of normally open and normally closed contacts.
Lesson 3 - And'd normally open contacts
- Reviews concept of normally open and relates to PLC term (examine if closed)
- Introduces logic And operation and And gate
- Relates a relay ladder logic diagram to a ladder logic program.
Lesson 4 - Or'd normally open contact
- Introduces logical Or operation and Or gate.
- Relates a relay logic diagram using Or operation to a ladder logic program.
Lesson 5 - Normally open / normally closed contacts
- Reviews maintained and momentary push buttons.
- Relates a relay ladder logic diagram using normally open and normally closed operation to
ladder logic program.
Lesson 6 - Interlocked logic
- Introduces concept of Not.
- Reviews concept of normally open and normally closed relay contacts.
- Relates normally closed concept to examine if open.
- Describes the concept of the interlock.
- Relates a relay ladder logic diagram using interlock concept to a ladder logic program.
Lesson 7 - Lockin using momentary contacts
- Introduces concept of latch.
- Reviews concept of momentary and maintained push buttons.
- Reviews concept of Not
- Relates a relay ladder logic diagram using a lockin to ladder logic program.
Lesson 8 - On delay timer
- Introduces on and off delay timers.
- Describes use of accumulated time, preset time, and done contact.
- Relates a hardware on delay timer to a ladder logic program implementation of an on delay
timer.
Lesson 9 - Traffic light logic
- Describes the relay ladder logic implementation of a traffic light logic circuit.
- Relates the relay ladder logic implementation to a ladder logic program for the traffic
light application.
- Reviews the on delay timer.
Lesson 10 - Counter application
- Introduces the up counter.
- Describes use of the accumulated count, preset count, counter reset, and done contact.
- Describes a ladder logic programming application that makes use of the up counter.
Learning Outcome
When you have completed the lessons and tests, you
will have developed the following skills:
- Identify the various components of a relay.
- Identify the various programmable logic controller modules and their functions.
- Produce a relay ladder drawing from an electric circuit.
- Identify the differences and similarities between normally open (examine if closed)
contacts, normally closed (examine if open) contacts, momentary push-button switches, and
maintained push-button switches.
- Produce a ladder logic program from a relay ladder logic circuit.
- Use And, Or and Not logic components in developing a ladder logic program.
- Use On delay timers in developing a ladder logic program.
- Identify the differences between On delay and Off delay timers.
- Use Up counters in developing a ladder logic program.
- Use Latches or Lockins in developing a ladder logic program.
- Use Interlocks in developing a ladder logic program.
- Use Only delay timers, And, Or, Not, logic in developing traffic light application.
- Use a counter, On delay timer, And, Or, Not, logic in developing a conveyor hopper bin
loading application.
Further practice and skills development After
completing P-SIM 1000, the student should practice his/her programming skills on a simulator. The
P-SIM 2000 simulator is an excellent program that emulates a ladder logic development program and
allows the student to test his/her program on a simulated process.
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