Rockwell Automation 1772-LS_LSP,D17726.8.6 PROG/OPER MANUAL-MINI PLC-2/05 - Manual (Page 217)

Programming Techniques
Chapter 18
18-9
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. This application is only for demonstration
purposes. Do not try to program this application using your online
production equipment.
Documenting Your Program
Here is a list of tasks for you to practice good documentation habits.
This task: Is this:
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 NO TAG and NO TAG. Additional worksheet
are available through your local AllenĆBradley distributor or sales
engineer.
Task 4 Write out your processor's 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 three seconds.
6. The file tubes are removed from each bottle.
7. A solenoid moves the bottles to the next station.
Bottle Filling Application