Schneider electric dealer in chennai | Automation company in chennai

Schneider electric dealer in Chennai | Automation company in Chennai 



The Central Processing Unit, the CPU, contains an internal program that tells the PLC how to perform the pursuit functions:

Execute the Tenancy Instructions contained in the User's Programs.  Schneider electric dealer in Chennai program is stored in "nonvolatile" memory, meaning that the program will not be lost if power is removedCommunicate with other devices, which can include I/O Devices, Programming Devices, Networks, and plane other PLCs.Perform Housekeeping activities such as Communications, Internal Diagnostics, etc
.
HOW DOES A PLC OPERATE?

There are four vital steps in the operation of all PLCs; Input Scan, Program Scan, Output Scan, and Housekeeping. These steps continually take place in a repeating loop.

Four Steps In The PLC Operations

1.) Input Scan
Detects the state of all input devices that are unfluctuating to the PLC
2.) Program Scan
Executes the user created program logic
3.) Output Scan
 Schneider electric dealer in Chennai Energizes or de-energize all output devices that are unfluctuating to the PLC.
4.) Housekeeping
This step includes communications with programming terminals, internal diagnostics, etc...
plc-operation.gif These steps are continually processed in a loop.


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