Rockwell Automation 1772-LV Mini-PLC - 2/15 Programmable Controller (Series B) Programming and Operations - Manual (Page 134)

Block Format Instructions
Chapter 10
10Ć12
When programming a sequencer input with a sequencer output instruction,
the counter address for both instructions may be the same.
This application starts when a bottle is placed on a conveyor, it ends when the
bottle is filled and ready for the next sequence of operations. This application is
totally automated.
Again, we emphasize that this application is only for demonstration purposes.
Do not try to program this application using your on-line production equipment.
Before we illustrate how to program the bottle filling application, here is a list
of tasks that would lead you to practice good documentation habits.
Task 1: Write out the sequence of operation that would explain the production
process.
Task 2: Make two lists: one for input devices and one for output devices.
Task 3: Complete the sequence worksheets which are located in this chapter.
They are figures 10.2 and 10.2. Additional worksheets are available through
your local Allen-Bradley distributor or sales representative.
Task 4: Write out your processor program using the sequencer instructions.
Task 5: Program your processor. Test out the program then place your
worksheets and all related information in a notebook for future reference.
Task 1: Sequence of Operation
1. Four bottles are placed at the beginning of a moving conveyor.
2. The bottles are at station one ready to be filled.
3. Each bottle actuates a photocell indicating that each bottle is present.
4. One fill tube is inserted into each bottle.
5. The file tubes fill each bottle for 3 seconds.
6. The file tubes are removed from each bottle.
7. A solenoid moves the bottles to the next station.
Bottle Filling Application
Documenting Your Program