In its most simplistic form, a PLC can be likened to the conductor of an orchestra with all manner of instruments – woodwind, strings, percussion and brass – to coordinate into a cohesive concerto of sound. It’s the conductor’s job to trigger each section of the orchestra into action at precise moments in order for that concerto to make harmonic sense.
Replace the conductor with a PLC and the orchestra with a bunch of machines on a production line and the basic principle is the same. A PLC makes sure each of those machines jumps into action at the right time in order to produce a fully automated and highly precise end product. PLCs are basically digital devices containing pre-programmed memory designed to issue instructions to a suite of machines in a synchronized manner over and over.
A PLC will use either an operating system or a user program.
The cheapest is about $100 and the most expensive is around $570, but the average price for a programmable logic controller is a little over $280.
Without due care and attention, programmable logic controllers can become spectacularly illogical. The good news is that assessing any issues with a digitally intelligent device like a PLC is a lot easier than troubleshooting a tractor.
These are the main things that cause issues in PLCs:
PLC maintenance is ongoing and essential to ensure smooth operation and no production-killing hiccups.
Most popular PLC Programmable Logic Controller suppliers and brands on IndustrySearch are Innovec Controls, SEW-EURODRIVE, Uticor AVG.