is OPC UA the future of IIoT answering your questions question number three
is OPC UA the future of IIoT answering your questions question number three

take zero all right so the last question on my answer for now is you want to read
take zero all right so the last question on my answer for now is you want to read

the question from the guy alright so the question was can you please come make a
the question from the guy alright so the question was can you please come make a

video that compares PLC versus SCADA versus DCS as how it pertains to OPC UA
video that compares PLC versus SCADA versus DCS as how it pertains to OPC UA

all right so in order to do that I gotta define these things all right so this is
all right so in order to do that I gotta define these things all right so this is

actually very simple so our PLC is our programmable logic
actually very simple so our PLC is our programmable logic

controller out in the field the programmable logic controller has IO
controller out in the field the programmable logic controller has IO

inputs and outputs it's got a little processor running on it it's got some
inputs and outputs it's got a little processor running on it it's got some

software running generally you can connect to it and you can write a
software running generally you can connect to it and you can write a

control program that basically can read inputs and based on certain conditions
control program that basically can read inputs and based on certain conditions

make changes to outputs right that's your PLC the SCADA system supervisory
make changes to outputs right that's your PLC the SCADA system supervisory

control and data acquisition is a software layer that is designed to
control and data acquisition is a software layer that is designed to

centrally control and acquire data from many plcs ok so I may have my SCADA
centrally control and acquire data from many plcs ok so I may have my SCADA

system here my SCADA may talk to another PLC the big thing
system here my SCADA may talk to another PLC the big thing

that SCADA does is it gives you control and it gives you alarming that's really
that SCADA does is it gives you control and it gives you alarming that's really

the big thing that skated us is it it tells us when we have a problem
the big thing that skated us is it it tells us when we have a problem

but it's central supervisory control and data acquisition is central dcs is very
but it's central supervisory control and data acquisition is central dcs is very

similar to SCADA but think of it as proprietary ok
similar to SCADA but think of it as proprietary ok

my SCADA system if I buy an off-the-shelf piece of SCADA software it
my SCADA system if I buy an off-the-shelf piece of SCADA software it

generally doesn't care who the manufacturer of this Hardware in the
generally doesn't care who the manufacturer of this Hardware in the

field is ok it'll can talk to Allen-Bradley he can talk to Siemens it could
field is ok it'll can talk to Allen-Bradley he can talk to Siemens it could

talk to Emerson talk to anything right the SCADA software is generally open and
talk to Emerson talk to anything right the SCADA software is generally open and

it can talk to anything ok a dcs system is generally in most cases it's
it can talk to anything ok a dcs system is generally in most cases it's

processed specific and it's all of this stuff turnkey process specific so a dcs
processed specific and it's all of this stuff turnkey process specific so a dcs

system dist a distributed control system has a SCADA component ok it has a SCADA
system dist a distributed control system has a SCADA component ok it has a SCADA

component it has a PLC and oftentimes they call it a
component it has a PLC and oftentimes they call it a

either a RIO and RTU or a PLC it has a hardware component okay out in the field
either a RIO and RTU or a PLC it has a hardware component okay out in the field

most of the time that hardware in the field also talks to one another directly
most of the time that hardware in the field also talks to one another directly

so I may have a RIO a remote i/o card that's at the beginning of my process
so I may have a RIO a remote i/o card that's at the beginning of my process

and one halfway through my process another one further up from my process
and one halfway through my process another one further up from my process

there's some intelligence going on some i/o some intelligence going on on the
there's some intelligence going on some i/o some intelligence going on on the

edge and then I have a massive controller in a control room that's
edge and then I have a massive controller in a control room that's

generally between the SCADA layer this is where the process control is taking
generally between the SCADA layer this is where the process control is taking

place this is where the program is running
place this is where the program is running

and then my SCADA layer is really a node in the system okay so in distributed
and then my SCADA layer is really a node in the system okay so in distributed

control systems I may buy a DCS from ABB so for example in the steel in the steel
control systems I may buy a DCS from ABB so for example in the steel in the steel

industry you use distributed control in your rolling mill because the technology
industry you use distributed control in your rolling mill because the technology

required the program required to run a rolling mill to turn a big billet into
required the program required to run a rolling mill to turn a big billet into

rebar is millions of lines of automation code so what happens is ABB writes the
rebar is millions of lines of automation code so what happens is ABB writes the

code one time you buy the distributed control system didn't they install all
code one time you buy the distributed control system didn't they install all

the i/o they install the process control center they installed the SCADA
the i/o they install the process control center they installed the SCADA

interface in the control room then they connect all that together and
interface in the control room then they connect all that together and

then they add in some custom stuff oh I might add in some additional i/o to
then they add in some custom stuff oh I might add in some additional i/o to

turn-to-turn a water valve on here and there and you can add in custom process
turn-to-turn a water valve on here and there and you can add in custom process

control but with a distributed control system you almost always come with a
control but with a distributed control system you almost always come with a

prepackaged program in that DCS to run your process and then you kind of add on
prepackaged program in that DCS to run your process and then you kind of add on

to it with PLC's and SCADA system think of them as blank slates right when I buy
to it with PLC's and SCADA system think of them as blank slates right when I buy

an allen bradley control logics it doesn't have a program on it I can take
an allen bradley control logics it doesn't have a program on it I can take

a program I've already written and put it on there or I can just write a new
a program I've already written and put it on there or I can just write a new

one from scratch which is the way it normally works a distributed control
one from scratch which is the way it normally works a distributed control

system can complete completely blank but in this day and age normally it does not
system can complete completely blank but in this day and age normally it does not

normally the DCS comes with the program to run your process already loaded on to
normally the DCS comes with the program to run your process already loaded on to

it that and here's the reason you use a distributed control system is these
it that and here's the reason you use a distributed control system is these

almost always talk to one they're over a super high-speed field
almost always talk to one they're over a super high-speed field

bus okay so generally these connections are not direct copper connections and
bus okay so generally these connections are not direct copper connections and

they're not over Ethernet and they're not over fiber most of the time the
they're not over Ethernet and they're not over fiber most of the time the

SCADA control unit and all your remote IOs and your process controllers are
SCADA control unit and all your remote IOs and your process controllers are

connected over some type of field bus so think of DC s as a turnkey solution that
connected over some type of field bus so think of DC s as a turnkey solution that

you can add on to to control your process and that turnkey solution
you can add on to to control your process and that turnkey solution

includes the SCADA component but let's say I add a new process to my plant so I
includes the SCADA component but let's say I add a new process to my plant so I

add in I install a new scale okay cuz I want to wait rail cars or something so I
add in I install a new scale okay cuz I want to wait rail cars or something so I

add a new PLC and I've got a rail car that I want away okay in this scale this
add a new PLC and I've got a rail car that I want away okay in this scale this

Mettler Toledo scale comes up into that PLC most of the time you are not going
Mettler Toledo scale comes up into that PLC most of the time you are not going

to add the SCADA interface to the DCs SCADA system why because it takes too
to add the SCADA interface to the DCs SCADA system why because it takes too

long to do it right you can yeah and here's why because you know the
long to do it right you can yeah and here's why because you know the

companies that make DCs systems like ABB there are drivers that give us the
companies that make DCs systems like ABB there are drivers that give us the

ability to talk from our SCADA system through for example cap wear to their
ability to talk from our SCADA system through for example cap wear to their

field bus system okay so the answer that's the difference the difference is
field bus system okay so the answer that's the difference the difference is

is that think of SCADA in plc as the blank slate the open architecture and
is that think of SCADA in plc as the blank slate the open architecture and

think of dcs as the turnkey solution but they if we were to Venn diagram their
think of dcs as the turnkey solution but they if we were to Venn diagram their

functionalities the two circles would nearly stand right on top of one another
functionalities the two circles would nearly stand right on top of one another

a car would be a dcs they eat the electronic control model module the ECM
a car would be a dcs they eat the electronic control model module the ECM

module the flow control module the exhaust control module those are all
module the flow control module the exhaust control module those are all

distributed control systems for your car the unit itself whatever they call it
distributed control systems for your car the unit itself whatever they call it

you know like my Cadillac they call it something linked that is the dcs for my
you know like my Cadillac they call it something linked that is the dcs for my

Cadillac right on Tesla Tesla is a to all Tesla vehicles are distributed
Cadillac right on Tesla Tesla is a to all Tesla vehicles are distributed

control systems okay whereas the PLC is the actual brick it's the hardware and
control systems okay whereas the PLC is the actual brick it's the hardware and

the SCADA system is the piece of software the distributed control system
the SCADA system is the piece of software the distributed control system

is the completed solution automation kit would be more plc scada
is the completed solution automation kit would be more plc scada

like you can kind of build your own correct that's exactly it yeah plc scada
like you can kind of build your own correct that's exactly it yeah plc scada

would be more like Lego or minecraft think of it as minecraft. PLC SCADA is
would be more like Lego or minecraft think of it as minecraft. PLC SCADA is

like minecraft distributed control system is going to be like Mario level
like minecraft distributed control system is going to be like Mario level

builder it comes prepackaged and ready to go but you can build your own levels
builder it comes prepackaged and ready to go but you can build your own levels

if you want to yeah allen-bradley spam packs is another good
if you want to yeah allen-bradley spam packs is another good

in fact Alan Bradley's plant packs was a approach at answering DCs for for a
in fact Alan Bradley's plant packs was a approach at answering DCs for for a

labrat for rock well anyway that was a really good question
labrat for rock well anyway that was a really good question

and thanks for watching
and thanks for watching