18-01-2013, 04:45 PM
PROGRAMMING LOGIC CONTROLLER
PROGRAMMING LOGIC.pptx (Size: 189.04 KB / Downloads: 23)
INTRODUCTION
A solid state digital electronic device, designed for use in an industrial environment.
A microprocessor based specialized computer that carries out control functions of many types and levels of complexity.
Basic structure
Central processing unit,
Programmer / Monitor,
Input / output modules.
CPU
Microprocessor: Carries out mathematic and logical operations.
Memory: Which stores the data and information that can be retrieved.
Power supply: Electrical supply that converts AC into DC.
PLC Input modules
It senses the presence or absence of an input signal in each terminals. Input signals tells what switch, sensors ON or OFF in the process.
Converts the input signals for HIGH or ON state.
Carries out electronic isolation.
Electronic circuits produces an output.