0 1 00:00:21,470 --> 00:00:22,150 Hello. 1 2 00:00:22,200 --> 00:00:25,560 In this video we are going to learn communication. 2 3 00:00:25,560 --> 00:00:33,760 What is communication or what is serial communication or what is TCP/IP communication and etc. 3 4 00:00:33,780 --> 00:00:42,060 First of all the exchange of data between two or more devices is called communication. 4 5 00:00:42,120 --> 00:00:43,320 Important point. 5 6 00:00:43,350 --> 00:00:51,960 The exchange of data between two or more device it can be divided into two classed as serial and internet 6 7 00:00:51,960 --> 00:00:52,960 communication. 7 8 00:00:53,070 --> 00:00:58,770 Communication should be handled in two sections as interface and protocol. 8 9 00:00:58,780 --> 00:01:01,170 Another important point. 9 10 00:01:01,170 --> 00:01:05,440 Serial communication interfaces is standard . 10 11 00:01:05,460 --> 00:01:10,380 RS232-RS485-RS422 but this 11 12 00:01:10,380 --> 00:01:16,940 is not common usage but RS232/485 for delta. 12 13 00:01:16,960 --> 00:01:18,650 plcs are really important. 13 14 00:01:18,840 --> 00:01:25,240 You are communicating with the PC-PLC C one by one or point to point communication with rs232 14 15 00:01:25,250 --> 00:01:26,500 RS-232 15 16 00:01:26,520 --> 00:01:34,910 You can communicate more than one or two or a lot of devices with the Delta PLCS. 16 17 00:01:35,010 --> 00:01:44,250 If you are using RS-485 communication or as serial communication RS232 is one to one communication 17 18 00:01:44,250 --> 00:01:48,770 interface consisting of master and slave RS-485 18 19 00:01:48,780 --> 00:01:55,680 One of the master device than the rest of all will be slave and only can send and receive at the same 19 20 00:01:55,680 --> 00:01:59,740 time or interface where it can communicate with the more than one slave. 20 21 00:01:59,760 --> 00:02:05,370 This communication interface uses two wire lines and RS422. 21 22 00:02:05,370 --> 00:02:11,490 Communication is the interface where the both sending and receiving can be made at the same time and 22 23 00:02:11,490 --> 00:02:15,180 the master device can communicate with one or more slaves. 23 24 00:02:15,180 --> 00:02:22,380 This communication interface uses for wire lines the language spoken on the communication interface 24 25 00:02:22,410 --> 00:02:31,480 is called protocol really important the device is to be able to communicate between them but the first 25 26 00:02:31,480 --> 00:02:37,650 thing they must or he must know or it must know and support the same protocol. 26 27 00:02:38,230 --> 00:02:45,880 If you are communicating , trying to communicate with the devices but if you are not adopted or set 27 28 00:02:45,910 --> 00:02:54,130 at the same settings so it will be like a Japan or Turkish language or like one turk. 28 29 00:02:54,120 --> 00:02:59,430 People trying to communicate with the English or British people or something like this. 29 30 00:02:59,430 --> 00:03:04,320 So there will be a confliction and the next thing in here. 30 31 00:03:04,380 --> 00:03:10,760 Modbus communication protocol basics ;master and slaves for the modbus communication protocol is 31 32 00:03:10,790 --> 00:03:12,000 really important. 32 33 00:03:12,000 --> 00:03:18,930 The master controls the communication really important master control the communication it is the unit 33 34 00:03:18,960 --> 00:03:21,560 that creates writing and reading queries. 34 35 00:03:21,660 --> 00:03:27,770 I mean people and the computers and etc. can be master unit.For Slave 35 36 00:03:28,230 --> 00:03:30,540 They are communicated devices. 36 37 00:03:30,580 --> 00:03:35,190 They are only obligated to answer the queries sent to them. 37 38 00:03:35,190 --> 00:03:43,410 Plcs, AC drivers or VFDs I mean process controllers etc. can be a slave device. 38 39 00:03:43,410 --> 00:03:47,110 Things to consider in modbus communication theoretically. 39 40 00:03:47,520 --> 00:03:52,760 Up to 255 slave device can be addressed on the modbus communication line. 40 41 00:03:52,950 --> 00:03:59,910 Considering the line it is not suitable for a healthy communication on 32 device communication 41 42 00:03:59,910 --> 00:04:05,360 line that is more convenient not to exceed 16 device on lines. 42 43 00:04:05,490 --> 00:04:14,170 If there is a data density if we are trying to read and write a lot of data a lot of words in in your 43 44 00:04:14,180 --> 00:04:15,510 plc projects. 44 45 00:04:15,810 --> 00:04:25,080 It is not suitable to communicate with over 16 device but you can also theoretically communicate with 45 46 00:04:25,410 --> 00:04:32,100 maximum 255 slave device there can only be one master. 46 47 00:04:32,130 --> 00:04:35,340 This is really important in the modbus communication line. 47 48 00:04:35,340 --> 00:04:40,050 If you adapt two master or three master there will be an error. 48 49 00:04:40,200 --> 00:04:50,040 immediately and you need to consider this you need to focus this while you are starting Project. 49 50 00:04:50,040 --> 00:04:58,560 The first thing that you need to select your master immediately or you need to define 50 51 00:04:58,560 --> 00:05:02,170 your master.In the line that a collision occurs. 51 52 00:05:02,280 --> 00:05:08,850 If there is multiple master exists and by the way the communication problems arises 52 53 00:05:09,720 --> 00:05:16,590 and the next thing communication protocol format it expresses the speed of data flow in the system 53 54 00:05:16,590 --> 00:05:17,660 communicated. 54 55 00:05:17,670 --> 00:05:19,800 Speed of data flow. 55 56 00:05:19,800 --> 00:05:21,150 This is really important. 56 57 00:05:21,270 --> 00:05:29,640 If two or more devices are communicating they must be set at the same speed like 9200, 57 58 00:05:29,640 --> 00:05:40,020 19200 etc.. 58 59 00:05:40,050 --> 00:05:43,060 This is baudrade, speed of data flow. 59 60 00:05:43,060 --> 00:05:50,000 Equals to baudrade, the digital data encoding sequence refers to the format of the protocol data 60 61 00:05:50,340 --> 00:05:58,590 they must be using the same format to speak in the same language like 7 or 8 bits like 61 62 00:05:58,680 --> 00:06:03,860 even odd or none parity or like 1 or 2 or 0. 62 63 00:06:03,870 --> 00:06:05,110 Stop bits. 63 64 00:06:05,400 --> 00:06:12,170 I mean remember we were adopting for the modbus communication for Delta plcs. 64 65 00:06:12,170 --> 00:06:19,040 We were deciding the communication protocols and we were writing hexadecimal 86 or we are going 65 66 00:06:19,040 --> 00:06:22,730 to look these ones to next videos. 66 67 00:06:22,730 --> 00:06:28,400 we are going to write for example 86 as hexadecimal for the communication protocol. 67 68 00:06:28,400 --> 00:06:36,830 That moment we are sending to from our plc to devices and also inside of our plc. 68 69 00:06:36,830 --> 00:06:42,750 Okay we will communicate with the speed as the speed of data flow, as baudrate 69 70 00:06:42,770 --> 00:06:50,530 We will use 9600 speed and we will use just one stop bit, and we will use even. 70 71 00:06:50,540 --> 00:06:54,980 And we will use just a seven or eight bit like this. 71 72 00:06:54,970 --> 00:07:02,000 So this is the communication protocol format as basically and the communication distance is the another 72 73 00:07:02,000 --> 00:07:03,620 one important point. 73 74 00:07:03,620 --> 00:07:07,110 Communication distance depends entirely on environment. 74 75 00:07:07,160 --> 00:07:15,230 Environmental conditions magnetic noise emitted by working AC drive cabling quality and grounding 75 76 00:07:15,290 --> 00:07:17,550 are obvious criteria. 76 77 00:07:17,570 --> 00:07:22,190 There may be situations that cannot be communicate from five meters. 77 78 00:07:22,190 --> 00:07:24,980 This is really important and you are going to face it. 78 79 00:07:24,980 --> 00:07:30,830 Believe me or it may be in environments that can be communicate from 500 meters. 79 80 00:07:30,830 --> 00:07:37,730 If communication cannot be achieved due to signal losses at long distances the distance can be increased 80 81 00:07:37,730 --> 00:07:46,540 by using repeaters in between and the next modbus TCP/IP communication. 81 82 00:07:46,670 --> 00:07:53,390 The type of modbus communication , this type TCP/IP communication type is spoken over the 82 83 00:07:53,510 --> 00:08:02,450 Ethernet line is called modbus TCP/IP communication.TCP/IP controls more stable and less affected by 83 84 00:08:02,780 --> 00:08:07,600 interference.Communication speed is at the level of megabit speed. 84 85 00:08:07,610 --> 00:08:18,140 So if you are communicating via modbus TCP/IP communication that will be very very high speed and 85 86 00:08:18,140 --> 00:08:25,940 it will be a little bit more reliable and safe and you can use it if your device is supported this communication 86 87 00:08:26,730 --> 00:08:31,860 You can use it easily and you can think okay. 87 88 00:08:31,870 --> 00:08:33,320 Will it communicate or not. 88 89 00:08:33,320 --> 00:08:40,340 There will be no discussion about the communication using the one network structure devices between 89 90 00:08:40,390 --> 00:08:47,300 cities even countries can communicate with each other and the data collection can be performed one master 90 91 00:08:47,300 --> 00:08:54,140 limitation in the serial communication is not valid for the ethernet communication so I mean according 91 92 00:08:54,140 --> 00:08:59,220 to the device chips used the number can be up to 16. 92 93 00:08:59,220 --> 00:09:06,420 So in the ethernet communication TCP/IP communication you can use two or three or four Master 93 94 00:09:06,930 --> 00:09:13,880 So it is according to devices ,which type device that you are using. 94 95 00:09:14,050 --> 00:09:14,540 --. 95 96 00:09:14,670 --> 00:09:15,300 --. 96 97 00:09:15,420 --> 00:09:23,570 Devices are devices supporting or not according to these you can use more than one 97 98 00:09:23,640 --> 00:09:31,000 Master in your TCP/IP communication so in this video I am finished here. 98 99 00:09:31,000 --> 00:09:32,490 See you in the next video.