Title: Module 4 Programming Challenge Chapter 5
Course: Open EIC225 Programmable Controllers > Section: MODULE 4: Basics of PLC Programming & Developing PLC Wiring Diagrams and Ladder Logic Programs

Problems 2,3,9 Chapter 6 5, 10

Upload or email the files for this assignment.  There will be both documents, drawing or scanned files and PLC programs to be submitted for this assignment. All figures mentioned are in the book.  This is a long assignment so plan ahead.

Chapter 5

2.  Redraw the program shown in Figure 5-50 corrected to solve the problem of a nested contact.

3.  Redraw the program shown in figure 5-51 corrected to solve the problem of a nested vertical programmed contact.

9.  Write the ladder program needed to implement each of the following (assume inputs A, B, and C are all normally open toggle switches):

a.  When input A is closed, turn ON and hold ON outputs X and Y until A opens.
b.  When input A is closed and either input B or C is open, turn ON output Y; otherwise, it should be off.
c.  When input A is closed or open, turn ON output Y.
d.  When input A is closed, turn ON output X and turn OFF output Y.

Chapter 6

5.  Design a PLC program and prepare a typical I/O connection diagram and ladder logic program that will correctly execute the hardwired control circuit in Figure 6-70.  Assume:

  - Stop pushbutton used is an NO type.
  - Run pushbutton used is an NO type.
  - Jog pushbutton used has one set of NO contacts.
  - OL contact is hardwired.

10.  A pump is to be used to fill two storage tanks.  The pump is manually started by the operator from a start/stop station.  When the first tank is full, the control logic must be able to automatically stop flow to the first tank and direct flow to the second tank throught the use of sensors and electric solinoid valves.  When the second tank is full the pump must shut down automatically.  Indicator lamps are to be included to signal when each tank is full.

  - Draw a sketch for the process.
  - Prepare a typical PLC proram for this control process.