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Contacts and Coils in PLC Ladder Logic

S Bharadwaj Reddy
The most elementary objects in Ladder Diagram programming are contacts and coils, intended to mimic the contacts and coils of electromechanical relays. Contacts and coils are discrete programming elements, dealing...

PLC Memory Mapping and I/O addressing

S Bharadwaj Reddy
A wise PLC programmer once told me that the first thing any aspiring programmer should learn about the PLC they intend to program is how the digital memory of that...

PLC Program for Automatic Liquid Mixing Application

S Bharadwaj Reddy
Liquid Mixing Application This is PLC Program for Automatic Liquid mixing Application. Problem Description In many industries, there are lots of mixing system are used for solutions mixing. Some plants...

PLC Program for Sequential Motor Control

S Bharadwaj Reddy
Sequential Motor Control This is PLC Program for Sequential Motor Operating System. Problem Description In many industries, there are lots of motors are used. Sometimes we need to start more...

PLC Program for Two Way Switch Logic

S Bharadwaj Reddy
This is PLC Program for Two ways switch logic for staircase light in house PLC Two Way Switch Logic In duplex type house there are ground floor and first floor and...

PLC Program for Automatic Lamp Control in Storage Facility

S Bharadwaj Reddy
Automatic Lamp Control This is PLC Program for Automatic lamp Control in Godown (Storage Facility). Problem Description In old process, when the person enters in the godown (Storage facility), he/she...

PLC Program for Automatic Parameter Initialization when Power UP

S Bharadwaj Reddy
Parameter Initialization when Power UP This is PLC Program for Automatic Parameter initialization when power up. Problem Description In many applications it is necessary to initialize some data when machine...

PLC Program for Latching and unlatching Circuit

S Bharadwaj Reddy
PLC Latching and unlatching Circuit This is PLC Program for Latching and unlatched circuit for output. Problem Description In some conveying system operator fills tank manually by operation water pump manually....

3 Phase Motor Control using PLC Ladder Logic

S Bharadwaj Reddy
3 Phase Motor Control using PLC This is PLC Program for Forward and Reverse control for 3 Phase Asynchronous Motor. Problem Description There are lots of motors and conveyors used...

PLC Program for Conditional Control Logic

S Bharadwaj Reddy
PLC Conditional Control Logic This is PLC Program for Conditional Logic Circuit Problem Description In Industry or plants, there are lots of gear box systems used for different machines/motors. For...

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