There are so many applications of PLC especially in industry environment. Here are few examples of PLC programming applications that have been successfully completed and in use today:
• Plastics Industry
- Extruder factory, silo feeding control system
- Injection molding control system.
• Textile Industry
- Industrial batch washing machine control system
- Closed loop textile shrinkage system.
• Manufacturing Industry
- Lead acid battery plant, complete manufacturing system.
- Extruder factory, silo feeding control system
• Travel Industry
- Escalator operation, monitored safety control system.
- Lift operation, monitored safety control system.
• Aerospace
- Water tank quenching system
• Printing Industry
- Offset web press print register control system.
- Multi stage screen washing system.
• Food Industry
- Filling machine control system
- Main factory feed water pump duty changeover system
• Hospitals
- Coal fired boiler fan change-over system.
• Film Industry
- Servo axis controlled camera positioning system.
• Corrugating
- Main corrugators machine control system.
- BOBST platen press driver and control system.
• Agriculture
- Glasshouse heating, ventilation & watering system.
• Foundry
- Overhead transportation system from casting process to shot blasting machine.
• Leisure
- Roller coaster ride and effects control system.
- Greyhound track 'Rabbit' drive system.
Manufacturers such as Mitsubishi, Allen Bradley, Omron and Siemens have been around for a long time and produce very high quality equipment through years of development. It is quite probable that your machines have one of these makes controlling it.