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№

pro-relay

ekf

знакомство

modbus

программа

qmodbus

00:00:02

look at the control of the programmable

00:00:04

were on the four hundred and eighty-fifth

00:00:07

interface on such 2 circus,

00:00:08

initially I wanted to tell you that it does not

00:00:10

have hardware, but you constantly see this

00:00:14

controller and in addition to it there is an

00:00:16

extension module, this module

00:00:20

has a cream and about the middle one with this right here, the

00:00:23

485 interface additionally also

00:00:29

has a closer look, there are 8

00:00:33

switches they are responsible for the parameters of the

00:00:36

modbus rtu protocol, that is, there is the

00:00:39

data transfer rate, the number of

00:00:43

top bits and so on, but now

00:00:44

we’ll talk about this in more detail and,

00:00:49

accordingly, cream and Abe

00:00:52

data transfer from this earth

00:00:54

then I have an

00:00:59

interface converter, this is what it looks like,

00:01:03

my colleague was standing there, you can buy a similar

00:01:06

interface converter in stores

00:01:09

such as a few people, some other

00:01:11

electronics stores, some companies

00:01:15

produce, for example, there are companies that hurt

00:01:19

that the converters should be sealed, it will

00:01:21

sound and 185 interface in selfishness, but

00:01:25

if we have a system without a computer, we have

00:01:28

one control there that controls another, then there is

00:01:33

no need to convert and old age tour in the hut 485

00:01:38

also at our stand we have settings

00:01:41

for analog inputs see 1 2 3 4

00:01:45

meters from today we will try to

00:01:48

read the state of the analog inputs if

00:01:52

this is a closer look and a stone, then we can

00:01:55

see how the analog inputs change

00:02:00

here, analog input 5 under analog

00:02:03

input 1

00:02:04

on the first one is now 9 volts 9910 will

00:02:09

maximum, that is, the rest I rotate

00:02:12

these potentiometers and the value changes on the

00:02:17

rest of the analog inputs on now

00:02:24

let's move on to the design and

00:02:28

the program that allows you to control the

00:02:33

480 office,

00:02:36

let's look at the manual that you

00:02:38

can download in the description under the video

00:02:41

manual on the four hundred and eighty-

00:02:43

fifth interface, or rather on the

00:02:46

modbus rtu protocol itself,

00:02:48

here on page 7 you can find a

00:02:52

description of just these switches

00:02:55

that I showed you here first the

00:02:57

second third switch is responsible

00:02:59

for the data transfer speed, that is,

00:03:01

on four hundred and eighty-five you can

00:03:02

transfer data and baht slowly or

00:03:05

fast 4,800 this is slow for man bass

00:03:10

but 9:00 to the same standard will soon

00:03:12

be considered and you can change it from 19200

00:03:15

to 38400 kilobit second there are also two

00:03:21

switches, the fourth and fifth, they

00:03:23

are responsible for such indicators of the number of

00:03:26

stops, it ruins it and checking for the parity bit

00:03:29

or setting the parity bit, that is, there

00:03:33

are also four options here and the 6th

00:03:35

switch is the switch that is

00:03:38

responsible for the standard settings if

00:03:41

we set the 6th switch then

00:03:45

It doesn’t matter to us what state the

00:03:47

rest of the switches are in; we will have

00:03:50

standard indicators,

00:03:51

this is 38400 kilobits second, speed is 2

00:03:54

drain bits and checks for

00:03:58

parity,

00:04:02

but then let’s go straight to the

00:04:06

table of variables and I’ll go to

00:04:08

the program, it’s actually the table of

00:04:11

variables for discrete inputs

00:04:15

[music]

00:04:18

here are the addresses for analog inputs, but

00:04:22

now let's move on to the program

00:04:24

today, such training is more phrases, I

00:04:29

want to tell the protocol itself,

00:04:34

its structure, and we will make a couple of

00:04:38

requests there, and in the future I made a video about

00:04:40

this with a lot of questions and

00:04:43

will tell you how to interrogate discrete inputs,

00:04:46

but today the task will be to ask for

00:04:48

analog inputs input means the program

00:04:52

is called Puma 2, you can find it on

00:04:54

the Internet, you can use some

00:04:56

similar programs,

00:04:57

what’s good about it, it’s simple, it’s not

00:05:01

convenient if you work with a large

00:05:02

amount of data, in this regard, it’s

00:05:05

better to use what programs for

00:05:08

losses or scada systems where

00:05:11

the records are saved parameters in

00:05:13

this case we configure only one

00:05:15

command sent we receive something in

00:05:17

response

00:05:18

means according to the settings here

00:05:20

when you start the program the

00:05:25

com port appears it appears in the case

00:05:27

when you connect the

00:05:29

interface converter 425 people and is given a choice of

00:05:33

comfort but in this case I only

00:05:34

this one com port is why it

00:05:36

automatically comes up immediately, I’ll draw

00:05:39

your attention to the fact that if you set the

00:05:40

converter interface,

00:05:42

it often requires drivers and the

00:05:45

next indicator is the speed is 38400,

00:05:48

our standard speed, don’t look

00:05:52

at the instructions in our manual,

00:05:55

the switch Darren said

00:05:56

the switch, I cocked it as much as 6, that is,

00:05:59

I have standard settings for a

00:06:02

programmed one like

00:06:04

the number of bits is 8 for a programmed

00:06:06

relay this is standard the number of top

00:06:10

bits is also determined cannot be

00:06:12

either 1 or 2

00:06:13

which is knocked out in our case these are two

00:06:16

pillars knocked out as we looked and

00:06:18

the check for parity this code can be

00:06:20

turned off the parity check or

00:06:22

you can change it to check and parity

00:06:25

or even parity or even disable it

00:06:28

further, here we have

00:06:31

the structure of the modbus protocol, here you

00:06:34

can still see it, but the first column

00:06:38

received this direction, sent it, but

00:06:41

in fact, here is the package itself, these are the

00:06:44

zeros and ones that are sewn on the

00:06:47

four hundred and eighty-fifth interface,

00:06:51

if you decipher them, what the

00:06:55

first zeroes and ones that

00:06:57

will go along our wire will not represent is the number of

00:07:01

devices here is the slave and here he

00:07:03

is asked about the number of devices if

00:07:07

we are talking about the modbus protocol,

00:07:10

he has the following hierarchy there can

00:07:12

be only one device master

00:07:14

who can

00:07:16

be the initiator she can ask

00:07:19

her own she can order something glory

00:07:21

and the rest are layers in our case

00:07:26

we will have a computer suit well and besides the

00:07:29

layers he can also send something but he

00:07:31

can become only in response, that is, if

00:07:33

his master asks something, he answers,

00:07:35

let’s say we will ask for the state of the

00:07:39

analog input, he will respond to

00:07:41

the state of the output tax, but he himself does

00:07:43

n’t say anything and doesn’t give any commands to

00:07:48

the people,

00:07:50

so if you, as it were, have your own layers

00:07:53

number, that is, when the master sends a

00:07:56

command, he says to the first 2 for a

00:07:59

programmable role, you can set up to 99

00:08:02

addresses in principle and the protocol

00:08:04

supports 256 devices there by

00:08:08

default, the address is 1, it can be

00:08:11

changed by the program in pro design, but for us it makes

00:08:13

no sense to have one device

00:08:15

to change this address there are a couple of up to 5

00:08:17

devices, we set 1 2 3 4 5,

00:08:20

respectively, when the package is sent, it

00:08:23

first speaks first next next,

00:08:26

we have the entire structure of the table of variables in the

00:08:31

modbus rtu protocol presented from

00:08:35

these 4 segments, you can say, well,

00:08:39

firstly, these are

00:08:40

discrete and analog signals and the

00:08:45

inputs-outputs are the output, this is essentially there

00:08:48

if it is with them, the output is the output, these are

00:08:50

the coils, the voice is in English, that is, here

00:08:53

they are, the coils, these are the discrete outputs, they

00:08:57

can only have a state of 0 one

00:09:01

discrete output in which we save there

00:09:09

some value different from 0 or even

00:09:11

units cannot go further, there are discrete

00:09:14

inputs discrete empty horses are called

00:09:18

here next there are

00:09:21

analog signals analog outputs they

00:09:24

are called in the holding register from the analog

00:09:27

input there are three business but they are actually

00:09:31

not analog after all discrete but they

00:09:34

carry two bytes of data in principle,

00:09:38

quite a lot relative to option 0, one is

00:09:43

definitely a lot, this

00:09:46

structure is a control structure,

00:09:48

that is, the controller has coil outputs,

00:09:51

there are discrete inputs, and there are analog

00:09:54

inputs, there are analog outputs, but now

00:09:58

this is all conditional because in fact,

00:10:01

in these sections you can store any

00:10:08

values, that is, let’s say the state of

00:10:10

our outputs on a programmable steering wheel,

00:10:13

they can be stored in a cell there

00:10:18

holding a register, that’s why even though it’s

00:10:23

divided, in fact, in reality

00:10:27

you can write all the data, folding

00:10:30

register isn’t necessarily all files,

00:10:32

you can’t write them because they’re all zeros and

00:10:34

units there it is difficult to record an analog

00:10:37

signal, but often the table of

00:10:41

variables consists only of the

00:10:43

holding register itself and there is reading and

00:10:47

writing about we can read everything and

00:10:50

we can write, but here the logic is that

00:10:52

we

00:10:53

cannot record the progress at the input or there is some kind of

00:10:56

signal 0 1 is it discrete or

00:10:58

is there some kind of analog signal there, we

00:11:01

give a potentiometer there 5 volts

00:11:03

conditionally, but we can only read it,

00:11:06

but we can’t write it because

00:11:09

but we physically helped you, we can’t

00:11:11

give the potentiometer a command so that it

00:11:13

changes the input, so here The

00:11:17

logic goes that we only record coils, that

00:11:21

is, discrete and holding registers come out, that

00:11:24

is, analog outputs, that

00:11:28

is, we can output, we can force

00:11:30

the switch to work, and accordingly, there

00:11:34

is also a recording type like

00:11:37

recording several coils and recording several

00:11:40

registers, this way it is presented

00:11:44

more functionally q well the most popular one

00:11:47

for me is this 3 commands the

00:11:49

first command, well, even most often 3 6

00:11:58

then next we have the address of this cell,

00:12:03

that is, we have selected a segment from where we

00:12:06

will read something and this next

00:12:08

indicator is over and

00:12:10

if we read something there by to the

00:12:12

fifth address of the coils, then this is unambiguous;

00:12:15

if at the fifth address the holding register

00:12:18

is already different keys, that is, this is

00:12:21

essentially a different memory area,

00:12:23

but then you can take into account several

00:12:26

memory cells in a row, but this is not always

00:12:31

supported by devices and

00:12:33

see the Messi according to the instructions, then in some

00:12:35

cases you can read several

00:12:38

memory cells in a row are not possible in some cases,

00:12:43

and accordingly, at home letters and 3 chose the

00:12:46

sixth reading, this is where we have records here, we can

00:12:49

write to

00:12:51

well, then we also have a

00:12:54

checksum, that is,

00:12:56

look here at our number, the

00:12:58

functional code, this is actually

00:13:01

our parcel which

00:13:03

we will send via 48 fifth, then the address,

00:13:06

then the number of cells and the

00:13:09

checksum is needed to make sure that the

00:13:12

data has not been damaged, that is, when the

00:13:15

checksum converges, it means everything has

00:13:19

arrived as it was carried out on Now,

00:13:24

accordingly, let's try to

00:13:26

poll our controller, here we have already

00:13:31

switched to table of changes for

00:13:36

analog inputs and they are stored

00:13:40

here in the holding registers, that is, they need to be

00:13:45

taken into account

00:13:47

3 commands, but accordingly, if we

00:13:49

want to read the first analog input,

00:13:51

we need to send a parcel to

00:13:55

address 231,

00:13:59

this is the length, but what does 230 have to do with it and at the end of the AH

00:14:02

this means that we have

00:14:06

addresses to given in the hexadecimal system, if

00:14:13

we go to our program

00:14:15

mind from you, then the address is set here in the

00:14:19

decimal system, so to

00:14:23

translate 4 hexadecimal system

00:14:27

to decimal, we will need a calculator,

00:14:30

or you can do it like you did in me, but of

00:14:33

course if you have large numbers it will be

00:14:36

difficult,

00:14:39

the easiest way is to take a calculator, you need to

00:14:42

turn the calculator into

00:14:45

programmer mode, press the text, that is, this is

00:14:48

our speech, this is in the hexadecimal system,

00:14:51

we had the address 230 there, sign 230 and

00:14:54

see how much it is in the decimal

00:14:56

system, this is 560 10 vich, that is,

00:14:59

we set it here accordingly 560 but if in the

00:15:01

mba program it was possible

00:15:03

to set

00:15:04

16 personal address, they could not translate anything,

00:15:06

they simply wrote 203 passed 560 now we

00:15:12

have to count the state and set the entry angle

00:15:14

to a C number of which we

00:15:18

can read one cell, but here,

00:15:21

according to the instructions, it is clear that

00:15:23

we are alone 2 we won’t be able to read, we’ll get

00:15:25

an error in response, but accordingly everything is

00:15:31

ready for reading, let’s turn on

00:15:33

the camera with a programmable goal so that you

00:15:35

can see what values we have now,

00:15:39

now we look accordingly and I

00:15:42

showed you that you can change the value of the

00:15:44

analog inputs there, each of the four

00:15:47

I can change

00:15:48

let's set the first analog input 2

00:15:51

now nine point thirty-two

00:15:55

volts and now let's send the command

00:15:58

press stand and get 932

00:16:02

that is, in fact, the range is

00:16:04

in the description up to 999 and that is,

00:16:07

9.99 volts

00:16:10

it will be 90 the maximum value

00:16:13

turned up costs 999 now

00:16:18

we send again already when we receive the answer 999

00:16:21

let's move on to the next analogue

00:16:23

leaving this will be the address 561 and read

00:16:27

counted 86 means it should be 086 and

00:16:31

look at the programmable let the data

00:16:33

086 let's count the next 792 means it

00:16:40

should be 7.92

00:16:44

is from the next 4 read

00:16:48

376 well and accordingly, if you constantly

00:16:55

send something and rotate the potentiometer, there

00:16:59

we see how the data is constantly

00:17:01

updated on the four hundred and eighty-

00:17:05

fifth interface.

00:17:06

I wanted to finish with this today, write

00:17:10

your wishes for questions in the comments, I

00:17:12

think the next few videos will also

00:17:15

be devoted to the modbus protocol of cards in everything

00:17:18

for now

Description:

Расскажу про самые азы протокола, покажу как наладить связь с Pro-Relay. Таблица переменных. https://drive.google.com/file/d/14GuHeUs2L6uDieJg4LpoNkTy_Kf_kqPZ/view?usp=drive_open

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