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Hello In this video.
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We are going to learn modbus serial communication between plc and drives link communication performed
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standard modbus  read and write operation for DVP series plc modbus addresses COM2 rs485
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connection port.
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Important point is here is supported by Delta DVP series plcs up to 16 stations.
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Normally for Delta DVP series Plcs support 16 stations for com2 RS485 communication.
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So if you are using EH2/SV/EH3/SV2 Plc models supports 32 stations in the link and reading
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and writing of more than 16 data when m1353 is on SA/SX/SS supports sixteen devices in the link
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and reading writing of sixteen data.
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So we need a Master PLC.
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This is the first thing.
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So and then we have slaves.
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We need slaves so we can communicate with servo drives or normal AC drives or vfds with
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the delta plcs or another places we can use two different communication link system first thing M
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1350 and M1351
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These are plc link, easy plc link that I can say to you, you can set these plc link auxiliary
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relays inside of the plc.
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So that moment these auxiliary relays are going to start plc link or communication or serial communications
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start bits
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Then after these bits set it in the plc you can read and write data as between slaves and master.
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Also you can use these commands modbus data read, write and modbusrw
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Read and write.
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ModbusRW modbus data write mode w r commands.
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So what is the difference between it.
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First thing in here.
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You can create your communication link system so you can communicate with 50 device or 75 device with
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these commands in here.
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You can communicate with 16 stations or 16 device or if your CPU
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As I told you before these ones so you can communicate with 32 device and in here for easy or enable
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plc link or just for these two bits you can see complete special data registers and auxiliary relays.
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For example for communication two Mone thousand one hundred twenty retained communication settings
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for com2 again M1143 decides ASCII or RTU ode selection for  communication
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protocol.
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D1120 inside of these data registers.
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We need to put our communication protocol d1121 plc communication
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address.
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So that means master plc
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address, for example to send request read and write request means M1122
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M1122
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This is for com2 sending request so you can see a complete table in here so you can get errors and
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also after reading and writing completed or receiving completed I mean you can see this auxiliary relays
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you can use these auxiliary relays in your program or in your project in here too.
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I can divide this page to two.
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First thing these ones.
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Supported by Delta or created by Delta so we can use communication protocol.
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Function block  inside of ISPSOFT
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So it is equals to  this.
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You can write your communication protocol as manual like this for plc communication address D1121
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D1121
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Like in here for com2
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This is our Master plc address is 1
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So in here hexadecimal 86 we are sending it to D1120.
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Let's take a look.
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d1120 in here communication protocol settings we are writing it in D 1120
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data register and in here we are retaining the communication M1120
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Let's take a look where it is in here retain communication settings.
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So in here also.
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D1129
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Let's take a look.
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What is it.
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1129
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where it is in here in here.
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Set value for data receiving timeout.
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So in here we are deciding time our time.
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So this is just millisecond.
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So let's take a look.
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Where can we find communication protocol function block in ıspsoft let's create a new project
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in ıspsoft of new project is created.
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Let's create the programs a new leave it like this.
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Say OK.
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A new program is created in the right site.
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You will see Delta library in Delta library.
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You're going to see comm protocol settings.
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Let's take a look in here.
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In here you can see COM1-2-3 protocol function blocks
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If you are communicating with your slaves via com2 ,you need to you can drop this function
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block like this press left mouse left click press clicked on in here drag and drop say OK or you can
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give a name to your function block in here you're going to see if you're if you bring your mouse to baud
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rate you will see if you're using a rate as 9600 you need to write here.
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1
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I need to write here my numlock was closed.
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for this data length if we are using your data length as say 7 you need to write here 1 for parity
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let's say let's take a look you can come here for example.
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Even for even we need to write year 3 for Stop Bit
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We need to write here for example one is like this we can fulfill it.
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So for after this function block is created.
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You don't need this one.
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You don't need this one if you are using this.
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You don't need this or you cannot use this so you need to assign your parameters for communication for
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modbus communication in here.
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Just an example.
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And in here to usage of it.
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So m1122
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Let's go back m1122 is sending request.
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So in here we are sending request.
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Read and write.
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And in here how we are detecting.
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Read and write.
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So hexadecimal 10 and hexadecimal three.
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Read and write commands or values for modbus communication.
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So we are reading and writing datas and we are writing these ones 4001 
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in here as to what is it , the function two, function code function
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code is should be hexadecimal three hexadecimal six or hexadecimal ten or K three as decimal K six as
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decimal K 16 as decimal in here.
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D4000 for example.
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These are all assigned by me.
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External device addresses which address that we are going to read and write values or data.
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So for example second slave we are going to write or read a data.
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So we need to put here two.
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And like this after you've fulfilled your mode read write function in here your data is according to
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this reading a register of being read and write or length of read and write data so you can communicate.
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via modbus
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Read and write command.
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So what is the difference between it also.
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For modbus read and write a function or instruction you need to assign your communication parameters you
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can use mode read and write a function or instruction if you want to communicate above 32 slave or
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16 slave
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You need this if you are communicating  with five or six or ten slave you can use PLC link
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easily.
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So with these plc link bits or internally auxiliary relays you can communicate easily with your
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slaves in here.
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Also we are going to learn communication protocol how to say so.
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You Need data link you need parity bit you need stop bits and you need baudrate.
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These are the most important four parameter in ıspsoft you're going to see auxiliary additions in help
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section and in auxiliary edition.
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You are going to see protocol setting code
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Let's take a look in here help- auxiliary edition- and protocol setting code
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This is what we need in here.
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Imagine you are you needas data length 8 parity OK.
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And stop bit two baud rate.
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Let's say 57600 and just click this one.
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You need to write as hexadecimal BB in D1120 data register in here
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we can calculated with our calculator.
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So these are 0 1 2 3 4 5 6 and 7.
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how we know this bit in here.
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You can see bit 0 detecting data link bit 1 and 2 assigned to parity bit , bit 3 is
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knowing or getting stop bits value bit 4 ,5 and 6 and 7 detecting as baudrate so we can knows
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or calculate our communication protocol setttings like this in here.
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We have an example.
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we have a table this is for plc link remember this one.
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If you are using this for easy communicating in here you're going to see Station Number four station
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number one reading address is d 1355 number of read data should be inside D1434 and reading
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data values will be stored in between D1480 and D1495 in here.
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Let's take a look.
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Our example 16 data read from hex 1000 adress in here.
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So and write this data to starting from the one thousand three hundred fifty five sequential data
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registers and how many data we are going to read we send this answer to here D1434
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D1434
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Here because we are communicating with first slave.
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So how many data we are going to read number of read data is assigned for the first station is D1434
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D1434
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These are cannot be changeable.
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So you cannot change these data registers.
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If we are using plclink M1350  M1351.
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So you need to use these data registers.
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So we are going to read from hexadecimal 1000 and starting reference address is here that we assigned
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in here so reading addresses also assigned also implemented in here.
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So we are going to read 16 data after we read 16 data from hexadecimal 1000 address reading data will
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be stored in D1480-95
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Between these data registers sixteen data is stored.
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So we are always moving these data these 16 data to D0, starting from D0 16 sequential
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data registers will be give us or show us readed values or readed datas
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So in here also let's take a look once to writing.
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Example for first station we are going to we are going to write some data how can we do this.
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How can we write data to our slaves writing address is for the first station D1415 number of write
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data is D1450 writing data values is here d1496 between the d1511
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d1511
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So in the first scan of plc we are writing hexadecimal 2000 to d1450
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writing address here.
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So how many data we are going to write 16 data.
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We are going to write to d1450 is here.
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So this is the second thing.
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So always  you can see M1000 normally open contact always on contact we are moving starting
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from D0 till D15 also D15 included.
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I mean 16 data register sixteen data or sixteen value we are writing these values from starting from
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D0 to D1496 these areas.
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So if you write inside of D0 is 1 D1496 will be
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1if you are writing for D1 let's say equals three so also the one thousand four hundred ninety seven
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will be three also it will be equal.
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So we are always writing this data to our slave for first station imagine you want to write
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to some data to 10. station so you need to use this writing address to here you need to use this number
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of write that the 1459 to here and in here we are going to write data to D1784 D1799 so sixteen
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data will be written to these data registers completely and in here how can we know how many .
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control type of the VFD's. for example for the vfd-e drive or Delta vfd-e
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modbus
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Read areas and write areas in here for example if you want to run your vfd and you
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want to communicate via your vfd or drive
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So you want to send to run command to your drive
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So which data you need to write to drive.
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This is the explanation complete table of explanation of vfde modbus write and read areas for
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run command.
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You need to write bit zero and one you need use bitzero and bit one.
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You need to put here 1 and 0 1 and 0 equals 2.
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K 2 This is binary system in binary system you if you calculate between is 1 and 0 equals 2 
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So that means as hexadecimal or decimal 2 for example if you want to write for forward command so you
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want to turn your motors forward.
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So you need to use bit 4 and 5 in here.
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If you write 0 and 1 imagine these are all zeros so binary ten thousand it equals to in our calculation
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sixteen.
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So you can write your commands to your vfd with this table.
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201
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Support of this table and you can calculate your commands which commands that you need.
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202
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So you can write these values to your vfd.
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203
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So in here important point command.
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write
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205
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Only so these areas until here.
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Just writable and also you need to use hexadecimal 2000 2001 and 2002.
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These are all addresses of vfd-e so you can read some datas from your vfd what you can read.
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For example the error codes and also completely in here the error codes but in the next page you will
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see still errors and also if your status of AC  drive or VFD the status of your vfd and also
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run stop off etc.  on the AC motor drive stops.
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Something like this whole  status or monitoring values that you can read from your vfd and also
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important point in here.
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You can read this address two thousand one hundred and two.
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So this is frequency command.
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For example if you need output frequency you need to read two thousand one hundred three address.
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For example if you want to know output voltage of your vfd  you need to read two thousand one hundred
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nine hexadecimal address for this video.
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I'm finished here.
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See you in the next video.
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we  will do some applications some examples to understand this communication.
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So just watch the example videos and then write similar codes in your plc project and test once and
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we will continue and we will put a little bit information about it and we will completely understand.
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Communication serial communication between plc  and drives and another external devices.