Page 308 - CITS - Electronic Mechanic - TT - 2024

ELECTRONICS MECHANIC - CITS

Configuring the hardware
Creating a program
Transferring the program to the CPU and debugging

Types of Modular PLCs
Small PLC
Medium-sized PLC
Large PLC
Small PLC:- Small PLC is a mini-sized PLC that is designed as compact and robust unit mounted or placed beside
the equipment to be controlled This type of PLC is used for replacing hard-wired relay logics, counters, timers, etc.
Medium-sized PLC:-It is mostly used PLC in industries which allows Many plug-in modules that are mounted on
backplane of the system .
Large PLCs:- Large PLCs are used wherein complex process control functions are required. Mostly, these PLCs
are used in supervisory control and data acquisition (SCADA) systems, larger plants, distributed control system, etc.
How PLC works ?
A programmable controller has a user programmable memory that reads input conditions and sets output condi-
tions to control a machine or process through the control program stored in the memory. PLC system consists
of three division:-

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CITS : E & H - Electronics Mechanic - Lesson 180 - 187