8/13/2019 15269558 PLC Presentation New

1/27

8/13/2019 15269558 PLC Presentation New

2/27

8/13/2019 15269558 PLC Presentation New

3/27

8/13/2019 15269558 PLC Presentation New

4/27

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

similar Sequential task as well as Process control

Advantages of PLC : he! are fast and designed for the rugged industrial

environment"

he! are attractive on Cost#Per#Point $asis"

hese %evices are less Proprietar! & '"g"" (sing )pen $us*nterface"+

hese S!stems are upgraded to add more *ntelligence andCapailities with dedicated P*% and 'thernet Modules"

%isadvantages of PLC : PLC were %esigned for -ela! Logic Ladder and have %ifficult!

with some Smart %evices"

o ma.imize PLC performance and /le.iilit!, a numer of)ptional Modules must e added

8/13/2019 15269558 PLC Presentation New

5/27

PLC !pes

Nano (Small)

Micro (Medium)

Large

$asic criteria for PLC !pes

Memory Capacity I/O Range

Packaging and Cost per Point

8/13/2019 15269558 PLC Presentation New

6/27

8/13/2019 15269558 PLC Presentation New

7/27

Central Processing Unit

It is a micro-controller based circuitry. The CPU consists offollowing blocks :

Arithmetic Logic Unit ALU!" Program memory Process image memory Internal memory of CPU! Internal timers and counters #lags

CPU $erforms the task necessary to fulfill the PLC functions.These tasks include %canning" I&' bus traffic control" Programe(ecution" Peri$heral and )(ternal de*ice communication"s$ecial functions or data handling e(ecution and self

diagnostics.

8/13/2019 15269558 PLC Presentation New

8/27

8/13/2019 15269558 PLC Presentation New

9/27

Output module

These modules act as link between the CPU and the out$utde*ices in the field.

Analog out$ut module : Ty$ical out$ut from these modules is+-, mA" - /

)( : Control /al*e" %$eed" /ibration

1igital out$ut module : Ty$ical out$ut from these modules is ,+/ 1C" 2 / AC" ,3 / AC)(. : %olenoid /al*es" lam$s" Actuators" dam$ers" Pum$ *al*eon off control

8/13/2019 15269558 PLC Presentation New

10/27

Power Supply

The $ower su$$ly gi*es the *oltage re4uired for electronicsmodule I&' Logic signals" CPU" memory unit and $eri$heral

de*ices! of the PLC from the line su$$ly.

The $ower su$$ly $ro*ides isolation necessary to $rotect thesolid state de*ices from most high *oltage line s$ikes.

As I&' is e($anded" some PLC may re4uire additional $owersu$$lies in order to maintain $ro$er $ower le*els.

8/13/2019 15269558 PLC Presentation New

11/27

Bus System

It is $ath for the transmission of the signal . 5u system isres$onsible for the signal e(change between $rocessor and I&'

modules

The bus system com$rise of se*eral single line ie wires & tracks

8/13/2019 15269558 PLC Presentation New

12/27

Sense the Input

Process the Logic

i!e Output

Outputs

Machine

orProcess

Programmable

controller

Inputs

8/13/2019 15269558 PLC Presentation New

13/27

Programming Terminal

O:0/7

O:0/7

O:1/5

Output Devices

Output Modules

Processor MemorInput Module

Input Devices

!adder Program

O:0/7

O:1/5

I:0/"

I:1/#

O:1/5

I:0/"

I:1/#

I:0/"

I:1/#

Data Input

Image Table

Output

Image Table

8/13/2019 15269558 PLC Presentation New

14/27

Mid " #$%&s ' iscrete Machine Control

Programming

Terminal

P!$

I/O

$onnection is Point to Point

Programming Language :

- 0elay ladder logic - #le(ibility in altering Control system o$eration

$onnection is Point to Point

8/13/2019 15269558 PLC Presentation New

15/27

arly " to " Mid #$*& ' iscrete and Process Control

%easonable $omputer

%unning P!$

Programming &o't(are

P!$

I/O

Programming !anguage :

) !adder Program

) PID

) Data &torage

M& ) DO&

8/13/2019 15269558 PLC Presentation New

16/27

Late 678s to early 668s : 1iscrete and ProcessControl

P$ runningP!$ Programming &o't(are

P!$

I/O

$onnection in net(or*ed allo(ing

Multiple P!$

P!$ became a part o' the

developing enterprise resource

sstem

+indo(s

P!$

8/13/2019 15269558 PLC Presentation New

17/27

TodayToday::1istributed I&' 9odules1istributed I&' 9odules

1istributed I&' modules

PLC

1istributed I&' scanner

1ata Communication 5us

8/13/2019 15269558 PLC Presentation New

18/27

Remote

I/O Network

SPLITTERS

FIBER OPTIC LINK

TAPS

RemoteI/O

Today :Today :ot 0edundant %ystemot 0edundant %ystem

8/13/2019 15269558 PLC Presentation New

19/27

$ontroller $ontroller

$ontroller

$ontroller

+or*station +or*station +or*station +or*station

&(itched ,ub

Today :Today :)thernet Technology in PLCs)thernet Technology in PLCs

8/13/2019 15269558 PLC Presentation New

20/27

%emote

Plat'orm

+ireless Modem

+ireless Modem

P!$

, M IDispla

P$

Today :Today :;ireless communication;ireless communication

P!$

8/13/2019 15269558 PLC Presentation New

21/27

Siemens S+ "##&,- ##+,- #.+,

S% " &&- .&&- 0&&

Allen $radle! Micrologi1 #&&&- #&&- #+&&

SLC +/- +/&- +/&.

PLC +/#&- +/+ and +/0&

Modicon Nano Micro

Premium

2uantum

8/13/2019 15269558 PLC Presentation New

22/27

8 Analog Inputs Analog Output

!p/"own FastCounter

!p Counter

Programm#ng Term#nal PC Conne$t#on

!n#telwa% Port &or $onne$t#ono& up to ' Sla(es

PC)CIA memor% e*pans#on port

PC)CIA $ommun#$at#ons port

TS+,-.

Bu#lt #n 0#spla% &or I/O1#n.ra$k2 AS.#3 an0 "#ag

I/O )o0ules

8/13/2019 15269558 PLC Presentation New

23/27

CP!

E*ternal Power

Suppl%

I/O )o0ules

8/13/2019 15269558 PLC Presentation New

24/27

CP!

Power Suppl%I/O )o0ules

8/13/2019 15269558 PLC Presentation New

25/27

CP!

I/O )o0ules Ba$k plane

8/13/2019 15269558 PLC Presentation New

26/27

3he open- manu4acturer"independent

programming standard 4or automation is IC 5##.#".6 7ou

can thus choose 8hat con4iguration inter4ace you 8ish to

use 8hen 8riting your application '

Ladder iagram

Instruction List

9unction :lock iagram Se;uential 9unction Chart

Structured 3e1t

8/13/2019 15269558 PLC Presentation New

27/27

Cost o4 hard8are- so4t8are- Integration ngineering- esign-Installation- Start"up and Commissioning-