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Version 1.7 by Xiaoling on 2022/05/12 09:54
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Xiaoling 1.2 1 = 1. Introduction =
Xiaoling 1.1 2
Xiaoling 1.2 3 This article provide the examples for RS485-LN to connect to different type of RS485 sensors.
Xiaoling 1.1 4
Xiaoling 1.2 5 == 1.1 Example 1: Connect to Leak relay and VFD ==
Xiaoling 1.1 6
Xiaoling 1.2 7 This instruction is provided by Xavier Florensa Berenguer from [[NORIA GRUPO DE COMPRAS>>url:http://www.gruponovelec.com/]]. It is to show how to use RS485-LN to connect to Relay and VFD and communicate with Mobile. The structure is like below:
Xiaoling 1.1 8
Xiaoling 1.3 9 [[image:https://wiki.dragino.com/images/thumb/5/5c/RS485_01.png/600px-RS485_01.png||height="297" width="534"]]
Xiaoling 1.1 10
Xiaoling 1.2 11 Connection
Xiaoling 1.1 12
Xiaoling 1.3 13 [[image:https://wiki.dragino.com/images/thumb/f/f2/RS485_02.png/600px-RS485_02.png||height="743" width="528"]](% style="display:none" %)
Xiaoling 1.1 14
Xiaoling 1.2 15 Connection
Xiaoling 1.1 16
Xiaoling 1.2 17 Related documents:
Xiaoling 1.1 18
Xiaoling 1.2 19 * [[Solar Pump with Dragino>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Relay_VFD/]] : System Structure
20 * [[Configure Manual>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Relay_VFD/]] : Explanation on how to integrate to Node-red and to the Mobile Phone, and with link to the Github code.
21 * [[Video Demo>>url:https://www.youtube.com/watch?v=TAFZ5eaf-MY&t=6s&ab_channel=XavierFlorensaBerenguer]]
Xiaoling 1.1 22
23
Xiaoling 1.2 24 == 1.2 Example 2: Connect to Pulse Counter ==
Xiaoling 1.1 25
Xiaoling 1.2 26 This instruction is provided by Xavier Florensa Berenguer from [[NORIA GRUPO DE COMPRAS>>url:http://www.gruponovelec.com/]]. It is to show how to use RS485-LN to connect to Pulse Counter and communicate with Mobile. This example and example 2 compose the structure for a farm IoT solution. The structure is like below:
Xiaoling 1.1 27
Xiaoling 1.2 28 [[image:https://wiki.dragino.com/images/thumb/3/34/RS485_02_1.png/600px-RS485_02_1.png||height="364" width="600"]]
Xiaoling 1.1 29
Xiaoling 1.2 30 Connection
Xiaoling 1.1 31
Xiaoling 1.2 32 [[image:https://wiki.dragino.com/images/thumb/5/5f/RS485_02_2.png/600px-RS485_02_2.png||height="337" width="600"]]
33
34 Connection
35
36 * [[Pickdata MIO40 water pulse counter to LoRa with Dragino RS485-LN>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Pulse-Counter/]] : Configure Document
37 * [[Dragino Solution in Farm>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/&file=Dragino%20on%20Farms.pptx]]
38
39
40 == 1.3 Example3: Use RS485-LN with energy meters ==
41
42 === 1.3.1 OverView ===
43
Xiaoling 1.5 44 (((
Xiaoling 1.6 45 **Note**：The specifications of each energy meter are different, please refer to your own energy meter specifications.
Xiaoling 1.5 46 )))
Xiaoling 1.2 47
Xiaoling 1.5 48 (((
Xiaoling 1.2 49 This example describes a single-phase meter.This is the connection between the RS485-LN and the energy meter.
Xiaoling 1.5 50 )))
Xiaoling 1.2 51
52 [[image:https://wiki.dragino.com/images/thumb/f/f4/Meter1.jpg/600px-Meter1.jpg||height="800" width="600"]]
53
54 Connection1
55
56 How to connect with Energy Meter：
57
58 Follow the instructions of the electric energy meter to connect the phase line and the neutral line, and then connect 485A+ and 485B- to RS485A and RA485B of RS485-LN respectively.
59
60 The RS485-LN can be powered by 7 ~~ 24V DC power source. Connection as below
61
62 Power Source VIN to RS485-LN VIN+
63
64 Power Source GND to RS485-LN VIN-
65
66 Once there is power, the RS485-LN will be on.
67
68 [[image:https://wiki.dragino.com/images/thumb/1/15/Meter2.jpg/600px-Meter2.jpg||height="450" width="600"]]
69
70 Connection2
71
72 [[image:https://wiki.dragino.com/images/thumb/a/a5/Meter3.jpg/600px-Meter3.jpg||height="800" width="600"]]
73
74 Connection3
75
76
77 === 1.3.2 How to use the parameters of the energy meter and MODBUS commands ===
78
Xiaoling 1.7 79 If the user needs to read the parameters of the electric energy meter and use the modbus command,please refer to the appendix of the MODBUS communication protocol in the user manual of the energy meter.
Xiaoling 1.2 80
81 [[image:https://wiki.dragino.com/images/thumb/3/35/Meter4.png/600px-Meter4.png||alt="Meter4.png" height="193" width="600"]]
82
83 Example:AT+COMMAND1=01 03 00 00 00 01 84 0A
84
85 * The first byte : slave address code (=001～247)
86 * The second byte : read register value function code
87 * 3rd and 4th bytes: start address of register to be read
88 * 5th and 6th bytes: Number of registers to read
89 * 7th and 8th bytes: CRC16 checksum from bytes 1 to 6.
90
91 How to parse the reading of the return command of the parameter：
92
93 Example:RETURN1：01 03 02 08 FD 7E 05
94
95 * The first byte ARD: slave address code (=001～254)
96 * The second byte: Return to read function code
97 * 3rd byte: total number of bytes
98 * 4th～5th bytes: register data
99 * The 6th and 7th bytes: CRC16 checksum
100 * 08 FD is register data. Use short integer 16 bits to convert to decimal, get 2301, then 230.1V is the voltage.
101
102
103 === 1.3.3 How to configure RS485-LN and parse output commands ===
104
105 RS485-LN provides two configuration methods: AT COMMAND and DOWNLINK.
106
107 ==== via AT COMMAND: ====
108
109 First, we can use AT+CFGDEV to get the return value, and we can also judge whether the input parameters are correct.
110
111 If the configured parameters and commands are incorrect, the return value is not obtained.
112
113 [[image:https://wiki.dragino.com/images/b/bc/AT_COMMAND1.png||height="358" width="456"]]
114
115 AT COMMAND
116
117 AT+DATACUTx : This command defines how to handle the return from AT+COMMANDx, max reture length is 40 bytes. AT+DATACUTx=a,b,c
118
119 a: length for the return of AT+COMMAND
120
121 b:1: grab valid value by byte, max 6 bytes. 2: grab valid value by bytes section, max 3 sections.
122
123 c: define the position for valid value.
124
125 [[image:https://wiki.dragino.com/images/7/7d/AT_COMMAND2.png||height="278" width="477"]]
126
127 AT COMMAND
128
129 PAYLOAD is available after the valid value is intercepted.
130
131 [[image:https://wiki.dragino.com/images/3/3a/AT_COMMAND4.png||height="219" width="576"]]
132
133 AT COMMAND
134
135 You can get configured PAYLOAD on TTN.
136
137 [[image:https://wiki.dragino.com/images/thumb/c/c2/AT_COMMAND3.png/600px-AT_COMMAND3.png||height="138" width="600"]]
138
139 AT COMMAND
140
141 Example: CMD1:Read current data with MODBUS command. address:0x03 AT+COMMAND1= 01 03 00 03 00 01,1
142
143 RETURN1:01 03 02 00 02 39 85 00 00(return data)
144
145 AT+DATACUT1:9,1,4+5+6+7 Take the return value 00 02 39 85 as the valid value of reading current data and used to splice payload.
146
147 CMD2:Read voltage data with MODBUS command. address:0x00 AT+COMMAND2= 01 03 00 00 00 01,1
148
149 RETURN2:01 03 02 08 DC BE 1D(return data)
150
151 AT+DATACUT2:7,1,4+5 Take the return value 08 DC as the valid value of reading voltage data and used to splice payload.
152
153 CMD3:Read total active energy data with MODBUS command. address:0x0031 AT+COMMAND3= 01 03 00 31 00 02,1
154
155 RETURN3:01 03 04 00 00 00 44 FA 00(return data)
156
157 AT+DATACUT3:9,1,4+5+6+7 Take the return value 00 00 00 44 as the valid value of reading total active energy data and used to splice payload.
158
159 Payload:01 00 02 39 85 08 DC 00 00 00 44
160
161 [[image:https://wiki.dragino.com/images/thumb/9/9b/AT_COMMAND10.png/600px-AT_COMMAND10.png||height="278" width="600"]]
162
163 AT COMMAND
164
165 01 is device address,00 02 is the current, 08 DC is the voltage,00 00 00 44 is the total active energy.
166
167 [[~[~[image:https://wiki.dragino.com/images/thumb/b/b8/AT_COMMAND11.png/600px-AT_COMMAND11.png~|~|height="271" width="600"~]~]>>url:https://wiki.dragino.com/index.php/File:AT_COMMAND11.png]]
168
169 AT COMMAND
170
171 ==== 1.3.3.1 via LoRaWAN DOWNLINK ====
172
173 [[image:https://wiki.dragino.com/images/thumb/f/fc/DOWNLINK_METER1.png/600px-DOWNLINK_METER1.png||height="423" width="600"]]
174
175 DOWNLINK
176
177 Type Code 0xAF
178
179 0xAF downlink command can be used to set AT+COMMANDx or AT+DATACUTx.
180
181 Note: if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.
182
183 Format: AF MM NN LL XX XX XX XX YY
184
185 Where:
186
187 MM: the ATCOMMAND or AT+DATACUT to be set. Value from 01 ~~ 0F,
188
189 NN: 0: no CRC; 1: add CRC-16/MODBUS ; 2: set the AT+DATACUT value.
190
191 LL: The length of AT+COMMAND or AT+DATACUT command
192
193 XX XX XX XX: AT+COMMAND or AT+DATACUT command
194
195 YY: If YY=0, RS485-LN will execute the downlink command without uplink; if YY=1, RS485-LN
196
197 will execute an uplink after got this command.
198
199 Example:
200
201 AF 03 01 06 0A 05 00 04 00 01 00: Same as AT+COMMAND3=0A 05 00 04 00 01,1
202
203 [[image:https://wiki.dragino.com/images/thumb/4/45/DOWNLINK_METER2.png/600px-DOWNLINK_METER2.png||height="208" width="600"]]
204
205 DOWNLINK
206
207 [[~[~[image:https://wiki.dragino.com/images/thumb/2/20/DOWNLINK_METER3.png/600px-DOWNLINK_METER3.png~|~|height="105" width="600"~]~]>>url:https://wiki.dragino.com/index.php/File:DOWNLINK_METER3.png]]
208
209 DOWNLINK
210
211 [[image:https://wiki.dragino.com/images/thumb/2/27/DOWNLINK_METER4.png/600px-DOWNLINK_METER4.png||height="210" width="600"]]
212
213 DOWNLINK
214
215 [[~[~[image:https://wiki.dragino.com/images/thumb/3/39/DOWNLINK_METER5.png/600px-DOWNLINK_METER5.png~|~|height="176" width="600"~]~]>>url:https://wiki.dragino.com/index.php/File:DOWNLINK_METER5.png]]
216
217 DOWNLINK
218
219 [[image:https://wiki.dragino.com/images/thumb/a/a2/DOWNLINK_METER6.png/600px-DOWNLINK_METER6.png||height="365" width="600"]]
220
221 DOWNLINK
222
223
224 === 1.3.4 How to configure and output commands for RS485 to USB ===
225
226 This step is not necessary, it is just to show how to use a normal RS485 to USB adapter to connect to the meter to check the input and output. This can be used to test the connection and RS485 command of the meter without RS485-LN.
227
228 First, connect the A+ and A- of the USB to the 485 A and 485 B of the energy meter.
229
230 Open the serial port debugging, set the send and receive to HEX.
231
232 Baud rate: 9600
233
234 check digit: Even
235
236 [[image:https://wiki.dragino.com/images/thumb/8/8f/Usb_meter2.jpg/600px-Usb_meter2.jpg||height="800" width="600"]]
237
238 USB
239
240 [[image:https://wiki.dragino.com/images/thumb/6/62/Usb_meter1.jpg/600px-Usb_meter1.jpg||height="800" width="600"]]
241
242 USB
243
244 The configuration command is consistent with the AT command, input the hexadecimal command directly into the serial port, and the serial port will output the command.
245
246 Example:input：01 03 00 31 00 02 95 c4
247
248 {{{ output:01 03 04 00 00 00 42 7A 02
249 }}}
250
251 [[image:https://wiki.dragino.com/images/thumb/b/b3/Usb_meter3.jpg/600px-Usb_meter3.jpg||height="466" width="600"]]
252
253 USB
254
255 === 1.3.5 How to configure multiple devices and modify device addresses ===
256
257 If users need to read the parameters of multiple energy meters, they need to modify the device address, because the default device address of each energy meter is 01.
258
259 Set the device address according to the parameters in the appendix of the MODBUS communication protocol.
260
261 [[image:https://wiki.dragino.com/images/thumb/1/1f/Double_meter3.png/600px-Double_meter3.png||alt="Double meter3.png" height="83" width="600"]]
262
263 Example:These two meters are examples of setting parameters and device addresses.
264
265 [[image:https://wiki.dragino.com/images/thumb/e/ee/Double_meter1.jpg/600px-Double_meter1.jpg||alt="Double meter1.jpg" height="800" width="600"]]
266
267 [[image:https://wiki.dragino.com/images/thumb/7/72/Double_meter2.jpg/600px-Double_meter2.jpg||alt="Double meter2.jpg" height="800" width="600"]]
268
269 First of all, since the default device address of the energy meter is 01, the configuration of two energy meters will conflict, so we first connect an energy meter and configure the device address.
270
271 We can use AT+CFGDEV to set the device address.
272
273 We modify the device address 01 of the first energy meter to 02.
274
275 [[image:https://wiki.dragino.com/images/6/6b/Double_meter4.png||alt="Double meter4.png" height="141" width="456"]]
276
277 AT+CFGDEV:01 10 00 61 00 01 02 00 02,1
278
279 * 01:device adaress
280
281 * 10:function code
282
283 * 00 61：Register address
284
285 * 00 01：Number of Registers
286
287 * 02：Number of bytes
288
289 * 00 02：Modified device address
290
291 * 1：Check code
292
293 The device address setting of the energy meter is complete.
294
295 Another energy meter is a single active energy meter with a floating-point format.
296
297 Its default device address is 01, and the following are the parameters for configuring two energy meters.
298
299 [[image:https://wiki.dragino.com/images/1/13/Meter11.png||alt="Meter11.png" height="576" width="379"]]
300
301 [[image:https://wiki.dragino.com/images/thumb/7/7e/Meter12.png/600px-Meter12.png||alt="Meter12.png" height="262" width="600"]]
302
303 PAYLOAD:01 08 DF 43 62
304
305 * 08 DF is the valid value of the meter with device address 02.
306 * 43 62 is the valid value of the meter with device address 01.
307
308
309 == 1.4 Example 4: Circuit Breaker Remote Open Close ==
310
311 This instruction is provided by Xavier Florensa Berenguer from [[NORIA GRUPO DE COMPRAS>>url:http://www.gruponovelec.com/]]. It is to show how to use RS485-LN to connect to SCHNEIDER SMART and Monitor and control your cabinet remotely with no wires and with Dragino RS485-LN LoRaWAN technology. The structure is like below:
312
313 [[image:https://wiki.dragino.com/images/thumb/f/fa/RS485_04_2.png/600px-RS485_04_2.png||height="336" width="600"]]
314
315 Connection
316
317 * [[Circuit Breaker Remote Open Close>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Circuit_Breaker_Remote_Open_Close/]] : Configure Documen
318
319
320 == 1.5 Example 5: SEM Three Energy Meter with RS485-BL or RS485-LN ==
321
322 This instruction is provided by Xavier Florensa Berenguer from [[NORIA GRUPO DE COMPRAS>>url:http://www.gruponovelec.com/]]. It is to show how to use RS485-BL to connect to SEM Three Energy Meter and send the data to mobile phone for remote minitor. The structure is like below:
323
324 * [[Connect to SEM Three>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_End_Node/RS485-BL/Application_Note/&file=Dragino%20RS485BL%20and%20pickdata%20SEM%20Three%20v1.pdf]] : Configure Document For RS485-BL
325
326 * [[Connect to SEM Three>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/SEM_Three_Energy_Meter/&file=SEM%20three%20and%20Dragino%20RS485-LN%20v1.pdf]] : Configure Document for RS485-LN
327
328
329 == 1.6 Example 6:CEM C31 485-T1-MID Energy Meter with RS485-LN ==
330
331 This instruction is provided by Xavier Florensa Berenguer from [[NORIA GRUPO DE COMPRAS>>url:http://www.gruponovelec.com/]]. It is to show how to use RS485-LN to connect to CEM C31 485-T1-MID and send the data for remote minitor. The structure is like below:
332
333 * [[CEM C31 485-T1-MID>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/ELECTRICAL%20CABINET/&file=ELECTRICAL%20CABINET%20READINGS.pdf]] : Configure Document For RS485-LN
334
335
336 == 1.7 Example 7:Schneider Electric PLC M221 with RS485-BL ==
337
338 [[image:https://wiki.dragino.com/images/thumb/9/97/PLC_M221.png/600px-PLC_M221.png||height="353" width="600"]]
339
340 Network Structure
341
342 * [[Reference Instruction>>url:https://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Schneider%20Electric%20PLC/]]