A simple counter application in the programmable logic controller (PLC) using a counting example on conveyor motor and proximity sensor.
In most industrial applications we generally find the PLC controlling motor starter control using ladder logic programming.
Write a PLC ladder logic program to start and stop a conveyor motor based on a limit switch status signal.
A ladder logic program, which can be used as a warning signal when moving equipment, such as a conveyor motor, is about to be started.
Timers and counters are PLC internal instructions that provide the same functions as timing relays and counters.
Learn the basics of PLC with an example of a simple ladder logic program with the NO and NC contacts driving an output rung.
A complete PLC ladder diagrams program consists of several rungs, each controlling an output interface which is connected to an output field device.
During the PLC operation, the CPU reads or accepts the input data or status of the field devices and updates the output devices.
A PLC Counter counts the number of events that occur as a result of an input. There are two basic types of counters: Up-Counter and Down-Counter.
Symbolic representations of contacts and coils are the basic symbols of any ladder logic instructions set used in the PLC programming.