A Simple Counter Application in PLC
A simple counter application in the programmable logic controller (PLC) using a counting example on conveyor motor and proximity sensor.
Motor Starter Control PLC Logic
In most industrial applications we generally find the PLC controlling motor starter control using ladder logic programming.
Stop Start and Limit Switch PLC Logic
Write a PLC ladder logic program to start and stop a conveyor motor based on a limit switch status signal.
Warning Signal When Moving Equipment Ladder Logic Program
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
Timers and counters are PLC internal instructions that provide the same functions as timing relays and counters.
A Simple Ladder Diagram with NO and NC Contacts
Learn the basics of PLC with an example of a simple ladder logic program with the NO and NC contacts driving an output rung.
Ladder Diagrams
A complete PLC ladder diagrams program consists of several rungs, each controlling an output interface which is connected to an output field device.
PLC Operation
During the PLC operation, the CPU reads or accepts the input data or status of the field devices and updates the output devices.
Counters in PLC
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.
Basic PLC Instructions
Symbolic representations of contacts and coils are the basic symbols of any ladder logic instructions set used in the PLC programming.
