KAPIL PLCnew

8/8/2019 KAPIL PLCnew

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SOFCON INDIA PVT.SOFCON INDIA PVT.

LTD.LTD.(An ISO 9001-2008)We are Channel Partner of Rockwell

Automation (USA)

We have also completed projects forCanada, Nepal, Bhutan, Srilanka,Taiwan, Russia, Muscut etc

Automation required in every small /big process / manufacturing industry &Assembly plants


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INTRODUCTION OF PLCINTRODUCTION OF PLC

An industrial PLC system is used forthe development of the controls of

machinery

It was originally developed to

replace mechanical timers,

counters,relays etc


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Reasons why PLC is popularReasons why PLC is popular

Known-to-be reliableBug and glitch free

Long life

Can easily last 15-20 years or more

RuggedDesigned specifically for industrial and harsh

environment

Fast start-up

Millisecond to startup

PC controls would take minutes

Large number of I/O

Large number of Manufacturers

More choice and selection


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COMMUNICATION OFCOMMUNICATION OF

PLCPLC


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PLC Signal FlowPLC Signal Flow

Programming Terminal

O:0/7

O:0/7

O:1/5

Output Devices

Output ModulesProcessor MemoryInput Module

Input Devices

Ladder Program

O:0/7

O:1/5

I:0/6

I:1/4

O:1/5

I:0/6

I:1/4

I:0/6

I:1/4

DataInput

Image Table

Output

Image Table


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PLC Types

Nano (Small)

Micro (Medium) Large

Basic criteria for PLC Types

Memory Capacity I/O Range

Packaging and Cost per Point

Programmable Logic ControllersProgrammable Logic Controllers


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Type ofplcType ofplc

Allen BradleyMicroLogix

1000, 1100, 1200, 1500, SLC 500 Siemens

S7-200Mitsubishi

FX3U, FX2N, FX2NC, FX1N, FX1S Panasonic

FP-X, FP-Sigma, FP-0

Automation DirectDL05, DL06, DL205

OmronCP1H, CPM2C, CPM2A, CPM1A

SchneiderTwido


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AALLEN BRADLEY PLCLLEN BRADLEY PLC

MOUNTINGHOLE

STATUS LEDs

POWER

SUPPLY LINE GROUNDSCREW

Rs-232 channel

INPUT LEDs

OUTPUT LEDs

INPUTTERMIALS

OUTPUTTERMINALS


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ALLEN BRADLEY(MODEL NUMBER)ALLEN BRADLEY(MODEL NUMBER)

1761 - BULLETION NO

L - BASE UNIT (LARGE)

10 - NUMBER OF IN/OUT

B -I/P POWER SUPPLY(A=120vAC,B=24vDC )

X - MODE OF OPERTION(relay based)

B - MAIN POWER SUPPLY FOR PLC


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SOFTWARE USED

Software Rs logic 500

Driver used- Rs linx classicBaud rates- 9.6 kbs/19.2 kbs

Protocol used- AB_DF1/DH 485

Wire used - RS 232(pmo2)


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Central Processing Unit

It is a micro-controller based circuitary. The CPU consistsof following blocks :

Arithmatic Logic Unit (ALU), Program memory

Process image memory (Internal memory of CPU)

Internal timers and counters

Flags

CPU performs the task necessary to fulfill the PLCfuntions. These tasks include Scanning, I/O bus trafficcontrol, Program execution, Peripheral and External devicecommunication, special functions or data handling

execution and self diagnistics.



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Input module

These modules act as interface between real-time status ofprocess variable and the CPU.

Analog input module : Typical input to these modules is

4-20 mA, 0-10 V

Ex : Pressure, Flow, Level Tx, RTD (Ohm), Thermocouple(mV)

Digital input module : Typical input to these modules is 24 VDC, 115 V AC, 230 V AC

Ex. : Switches, Pushbuttons, Relays, pump valve on offstatus



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Output module

These modules act as link between the CPU and the output

devices in the field. Analog output module : Typical output from these

modules is 4-20 mA, 0-10 V

Ex : Control Valve, Speed, Vibration

Digital output module : Typical output from these modulesis 24 V DC, 115 V AC, 230 V AC

Ex. : Solenoid Valves, lamps, Actuators, dampers, Pumpvalve on off control



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PLC ProgrammingStandardsPLC ProgrammingStandards

The open, manufacturer-independent programmingstandard for automation is IEC 61131-3. You can thus choosewhat configuration interface you wish to use when writing yourapplication :

Ladder Diagram

Instruction List

Function Block Diagram

Sequential Function Chart

Structured Text


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SYMBOL FOR PLCSYMBOL FOR PLC Input Instruction --[ ]-- This Instruction is Called NORMALLY OPEN --[\]-- This Instruction is Called NORMALLY CLOSED

ANDGATE

ORGATE

NORGATE

DOL

STARTER


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Applications : Machine controls, Packaging, Palletizing, Material handling, similar

Sequential task as well as Process control

Advantages of PLC : They are fast and designed for the rugged industrial environment. They are attractive on Cost-Per-Point Basis.

These Devices are less Proprietary ( E.g.. Using Open Bus Interface.)

These Systems are upgraded to add more Intelligence and Capabilities

with dedicated PID and Ethernet Modules.Disadvantages of PLC : PLC were Designed for Relay Logic Ladder and have Difficulty with

some Smart Devices.

To maximize PLC performance and Flexibility, a number of Optional

Modules must be added



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ANY QUERRIES?????ANY QUERRIES?????


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Documents

KAPIL PLCnew