🚀 go-pugleaf

PLC does stand for "Programmable Logic Controller".  A PLC is not a
robot or a mechanical device.  Rather a PLC is a small real-time
computer/controller with I/O ports.  They are usually programmable in
a language called "ladder logic" (which is rather like older
electrical relay diagrams, not coincidentally) and are often
programmable in other languages as well.  Robots or other mechanical
devices can be controlled by PLCs if the I/O port is wired to the
mechanical device properly.  The protocol used to communicate between
a general-purpose computer and a PLC varies by vendor, though MAP is
becoming commonplace.