<
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edited by Xiaoling
on 2022/05/12 10:07
To version < 35.2 >
edited by Xiaoling
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1 +(% class="wikigeneratedid" %)
2 + **Contents:**
3 +
4 +{{toc/}}
5 +
1 1  = 1. Introduction =
2 2  
3 3  This article provide the examples for RS485-LN to connect to different type of RS485 sensors.
... ... @@ -6,14 +6,17 @@
6 6  
7 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:
8 8  
9 -[[image:https://wiki.dragino.com/images/thumb/5/5c/RS485_01.png/600px-RS485_01.png||height="297" width="534"]]
14 +[[image:image-20220527091852-1.png]]
10 10  
11 11  Connection
12 12  
13 -[[image:https://wiki.dragino.com/images/thumb/f/f2/RS485_02.png/600px-RS485_02.png||height="743" width="528"]](% style="display:none" %)
14 14  
19 +
20 +[[image:image-20220527091942-2.png]](% style="display:none" %)
21 +
15 15  Connection
16 16  
24 +
17 17  Related documents:
18 18  
19 19  * [[Solar Pump with Dragino>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Relay_VFD/]] : System Structure
... ... @@ -24,17 +24,20 @@
24 24  
25 25  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:
26 26  
27 -[[image:https://wiki.dragino.com/images/thumb/3/34/RS485_02_1.png/600px-RS485_02_1.png||height="364" width="600"]]
35 +[[image:image-20220527092058-3.png]]
28 28  
29 29  Connection
30 30  
31 -[[image:https://wiki.dragino.com/images/thumb/5/5f/RS485_02_2.png/600px-RS485_02_2.png||height="337" width="600"]]
32 32  
40 +[[image:image-20220527092146-4.png]]
41 +
33 33  Connection
34 34  
35 35  * [[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
36 36  * [[Dragino Solution in Farm>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/&file=Dragino%20on%20Farms.pptx]]
37 37  
47 +== ==
48 +
38 38  == 1.3 Example3: Use RS485-LN with energy meters ==
39 39  
40 40  === 1.3.1 OverView ===
... ... @@ -47,28 +47,42 @@
47 47  This example describes a single-phase meter.This is the connection between the RS485-LN and the energy meter.
48 48  )))
49 49  
50 -[[image:https://wiki.dragino.com/images/thumb/f/f4/Meter1.jpg/600px-Meter1.jpg||height="726" width="545"]]
61 +[[image:image-20220527092419-5.png]]
51 51  
52 52  Connection1
53 53  
65 +
66 +(((
54 54  How to connect with Energy Meter:
68 +)))
55 55  
70 +(((
56 56  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.
72 +)))
57 57  
74 +(((
58 58  The RS485-LN can be powered by 7 ~~ 24V DC power source. Connection as below
76 +)))
59 59  
78 +(((
60 60  Power Source VIN to RS485-LN VIN+
80 +)))
61 61  
82 +(((
62 62  Power Source GND to RS485-LN VIN-
84 +)))
63 63  
86 +(((
64 64  Once there is power, the RS485-LN will be on.
88 +)))
65 65  
66 -[[image:https://wiki.dragino.com/images/thumb/1/15/Meter2.jpg/600px-Meter2.jpg||height="433" width="577"]]
90 +[[image:image-20220527092514-6.png]]
67 67  
68 68  Connection2
69 69  
70 -[[image:https://wiki.dragino.com/images/thumb/a/a5/Meter3.jpg/600px-Meter3.jpg||height="800" width="600"]]
71 71  
95 +[[image:image-20220527092555-7.png]]
96 +
72 72  Connection3
73 73  
74 74  
... ... @@ -76,11 +76,12 @@
76 76  
77 77  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.
78 78  
79 -[[image:https://wiki.dragino.com/images/thumb/3/35/Meter4.png/600px-Meter4.png||alt="Meter4.png" height="193" width="600"]]
104 +[[image:image-20220527092629-8.png]]
80 80  
106 +
81 81  (% class="box infomessage" %)
82 82  (((
83 -Example:AT+COMMAND1=01 03 00 00 00 01 84 0A
109 +**Example:** AT+COMMAND1=01 03 00 00 00 01 84 0A
84 84  )))
85 85  
86 86  * The first byte : slave address code (=001~247)
... ... @@ -89,11 +89,13 @@
89 89  * 5th and 6th bytes: Number of registers to read
90 90  * 7th and 8th bytes: CRC16 checksum from bytes 1 to 6.
91 91  
118 +(((
92 92  How to parse the reading of the return command of the parameter:
120 +)))
93 93  
94 94  (% class="box infomessage" %)
95 95  (((
96 -Example:RETURN1:01 03 02 08 FD 7E 05
124 +**Example:** RETURN1:01 03 02 08 FD 7E 05
97 97  )))
98 98  
99 99  * The first byte ARD: slave address code (=001~254)
... ... @@ -103,10 +103,16 @@
103 103  * The 6th and 7th bytes: CRC16 checksum
104 104  * 08 FD is register data. Use short integer 16 bits to convert to decimal, get 2301, then 230.1V is the voltage.
105 105  
134 +(% class="wikigeneratedid" %)
135 +(((
136 +
137 +)))
138 +
106 106  === 1.3.3 How to configure RS485-LN and parse output commands ===
107 107  
108 108  RS485-LN provides two configuration methods: AT COMMAND and DOWNLINK.
109 109  
143 +
110 110  ==== 1.3.3.1 via AT COMMAND: ====
111 111  
112 112  First, we can use **AT+CFGDEV** to get the return value, and we can also judge whether the input parameters are correct.
... ... @@ -115,13 +115,14 @@
115 115  If the configured parameters and commands are incorrect, the return value is not obtained.
116 116  )))
117 117  
118 -[[image:https://wiki.dragino.com/images/b/bc/AT_COMMAND1.png||height="358" width="456"]]
152 +[[image:image-20220527092748-9.png]]
119 119  
120 -**AT COMMAND**
154 +AT COMMAND
121 121  
156 +
122 122  (% class="box infomessage" %)
123 123  (((
124 -AT+DATACUTx : This command defines how to handle the return from AT+COMMANDx, max reture length is 40 bytes. AT+DATACUTx=a,b,c
159 + AT+DATACUTx : This command defines how to handle the return from AT+COMMANDx, max reture length is 40 bytes. AT+DATACUTx=a,b,c
125 125  )))
126 126  
127 127  a: length for the return of AT+COMMAND
... ... @@ -130,52 +130,79 @@
130 130  
131 131  c: define the position for valid value.
132 132  
133 -[[image:https://wiki.dragino.com/images/7/7d/AT_COMMAND2.png||height="278" width="477"]]
168 +[[image:image-20220527092936-10.png]]
134 134  
135 135  AT COMMAND
136 136  
172 +
137 137  PAYLOAD is available after the valid value is intercepted.
138 138  
139 139  
140 -[[image:https://wiki.dragino.com/images/3/3a/AT_COMMAND4.png||height="219" width="576"]]
176 +[[image:image-20220527093059-11.png]]
141 141  
142 142  AT COMMAND
143 143  
180 +
144 144  You can get configured PAYLOAD on TTN.
145 145  
183 +[[image:image-20220527093133-12.png]]
146 146  
147 -[[image:https://wiki.dragino.com/images/thumb/c/c2/AT_COMMAND3.png/600px-AT_COMMAND3.png||height="138" width="600"]]
148 -
185 +(((
149 149  AT COMMAND
187 +)))
150 150  
189 +(((
190 +
191 +)))
192 +
193 +(((
151 151  **Example**: CMD1:Read current data with MODBUS command. address:0x03 AT+COMMAND1= 01 03 00 03 00 01,1
195 +)))
152 152  
197 +(((
153 153  RETURN1:01 03 02 00 02 39 85 00 00(return data)
199 +)))
154 154  
201 +(((
155 155  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.
203 +)))
156 156  
205 +(((
157 157  CMD2:Read voltage data with MODBUS command. address:0x00 AT+COMMAND2= 01 03 00 00 00 01,1
207 +)))
158 158  
209 +(((
159 159  RETURN2:01 03 02 08 DC BE 1D(return data)
211 +)))
160 160  
213 +(((
161 161  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.
215 +)))
162 162  
217 +(((
163 163  CMD3:Read total active energy data with MODBUS command. address:0x0031 AT+COMMAND3= 01 03 00 31 00 02,1
219 +)))
164 164  
221 +(((
165 165  RETURN3:01 03 04 00 00 00 44 FA 00(return data)
223 +)))
166 166  
225 +(((
167 167  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.
227 +)))
168 168  
229 +(((
169 169  Payload:01 00 02 39 85 08 DC 00 00 00 44
231 +)))
170 170  
171 -[[image:https://wiki.dragino.com/images/thumb/9/9b/AT_COMMAND10.png/600px-AT_COMMAND10.png||height="278" width="600"]]
233 +[[image:image-20220527093204-13.png]]
172 172  
173 173  AT COMMAND
174 174  
175 -01 is device address,00 02 is the current, 08 DC is the voltage,00 00 00 44 is the total active energy.
176 176  
238 +(% style="color:#4f81bd" %)**01 is device address,00 02 is the current, 08 DC is the voltage,00 00 00 44 is the total active energy.**
177 177  
178 -[[~[~[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]]
240 +[[image:image-20220527093251-14.png]]
179 179  
180 180  AT COMMAND
181 181  
... ... @@ -182,7 +182,7 @@
182 182  
183 183  ==== 1.3.3.2 via LoRaWAN DOWNLINK ====
184 184  
185 -[[image:https://wiki.dragino.com/images/thumb/f/fc/DOWNLINK_METER1.png/600px-DOWNLINK_METER1.png||height="423" width="600"]]
247 +[[image:image-20220527093358-15.png]]
186 186  
187 187  (((
188 188  DOWNLINK
... ... @@ -193,12 +193,15 @@
193 193  )))
194 194  
195 195  (((
196 -Type Code 0xAF
258 +**Type Code 0xAF**
197 197  )))
198 198  
199 199  (((
262 +(% class="box infomessage" %)
263 +(((
200 200  0xAF downlink command can be used to set AT+COMMANDx or AT+DATACUTx.
201 201  )))
266 +)))
202 202  
203 203  (((
204 204  Note: if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.
... ... @@ -244,84 +244,123 @@
244 244  AF 03 01 06 0A 05 00 04 00 01 00: Same as AT+COMMAND3=0A 05 00 04 00 01,1
245 245  )))
246 246  
247 -[[image:https://wiki.dragino.com/images/thumb/4/45/DOWNLINK_METER2.png/600px-DOWNLINK_METER2.png||height="208" width="600"]]
312 +[[image:image-20220527093430-16.png]]
248 248  
249 249  DOWNLINK
250 250  
251 251  
252 -[[~[~[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]]
317 +[[image:image-20220527093508-17.png]]
253 253  
254 254  DOWNLINK
255 255  
256 256  
257 -[[image:https://wiki.dragino.com/images/thumb/2/27/DOWNLINK_METER4.png/600px-DOWNLINK_METER4.png||height="210" width="600"]]
322 +[[image:image-20220527093530-18.png]]
258 258  
259 259  DOWNLINK
260 260  
261 261  
262 -[[~[~[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]]
327 +[[image:image-20220527093607-19.png]]
263 263  
264 264  DOWNLINK
265 265  
266 -[[image:https://wiki.dragino.com/images/thumb/a/a2/DOWNLINK_METER6.png/600px-DOWNLINK_METER6.png||height="365" width="600"]]
267 267  
332 +[[image:image-20220527093628-20.png]]
333 +
268 268  DOWNLINK
269 269  
270 270  
271 271  === 1.3.4 How to configure and output commands for RS485 to USB ===
272 272  
339 +(((
273 273  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.
341 +)))
274 274  
343 +(((
275 275  First, connect the A+ and A- of the USB to the 485 A and 485 B of the energy meter.
345 +)))
276 276  
347 +(((
277 277  Open the serial port debugging, set the send and receive to HEX.
349 +)))
278 278  
351 +(((
279 279  Baud rate: 9600
353 +)))
280 280  
355 +(((
281 281  check digit: Even
357 +)))
282 282  
283 -[[image:https://wiki.dragino.com/images/thumb/8/8f/Usb_meter2.jpg/600px-Usb_meter2.jpg||height="800" width="600"]]
359 +[[image:image-20220527093708-21.png]]
284 284  
285 285  USB
286 286  
287 -[[image:https://wiki.dragino.com/images/thumb/6/62/Usb_meter1.jpg/600px-Usb_meter1.jpg||height="800" width="600"]]
288 288  
364 +[[image:image-20220527093747-22.png]]
365 +
289 289  USB
290 290  
368 +
369 +(((
291 291  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.
371 +)))
292 292  
293 -Example:input:01 03 00 31 00 02 95 c4
373 +(((
374 +**Example:**  input:01 03 00 31 00 02 95 c4
375 +)))
294 294  
295 -{{{ output:01 03 04 00 00 00 42 7A 02
296 -}}}
377 +(((
378 + output:01 03 04 00 00 00 42 7A 02
379 +)))
297 297  
298 -[[image:https://wiki.dragino.com/images/thumb/b/b3/Usb_meter3.jpg/600px-Usb_meter3.jpg||height="466" width="600"]]
381 +[[image:image-20220527093821-23.png]]
299 299  
300 300  USB
301 301  
385 +
302 302  === 1.3.5 How to configure multiple devices and modify device addresses ===
303 303  
304 304  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.
305 305  
390 +(((
391 +(((
306 306  Set the device address according to the parameters in the appendix of the MODBUS communication protocol.
393 +)))
394 +)))
307 307  
308 -[[image:https://wiki.dragino.com/images/thumb/1/1f/Double_meter3.png/600px-Double_meter3.png||alt="Double meter3.png" height="83" width="600"]]
396 +[[image:image-20220527093849-24.png]]
309 309  
310 -Example:These two meters are examples of setting parameters and device addresses.
311 311  
312 -[[image:https://wiki.dragino.com/images/thumb/e/ee/Double_meter1.jpg/600px-Double_meter1.jpg||alt="Double meter1.jpg" height="800" width="600"]]
399 +**Example**:These two meters are examples of setting parameters and device addresses.
313 313  
314 -[[image:https://wiki.dragino.com/images/thumb/7/72/Double_meter2.jpg/600px-Double_meter2.jpg||alt="Double meter2.jpg" height="800" width="600"]]
401 +[[image:image-20220527093950-25.png]]
315 315  
403 +[[image:image-20220527094028-26.png]]
404 +
405 +(((
406 +(((
316 316  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.
408 +)))
409 +)))
317 317  
411 +(((
412 +(((
318 318  We can use AT+CFGDEV to set the device address.
414 +)))
415 +)))
319 319  
417 +(((
418 +(((
320 320  We modify the device address 01 of the first energy meter to 02.
420 +)))
421 +)))
321 321  
322 -[[image:https://wiki.dragino.com/images/6/6b/Double_meter4.png||alt="Double meter4.png" height="141" width="456"]]
423 +[[image:image-20220527094100-27.png]]
323 323  
324 -AT+CFGDEV:01 10 00 61 00 01 02 00 02,1
425 +(% class="box infomessage" %)
426 +(((
427 +**AT+CFGDEV:01 10 00 61 00 01 02 00 02,1**
428 +)))
325 325  
326 326  * 01:device adaress
327 327  
... ... @@ -343,10 +343,11 @@
343 343  
344 344  Its default device address is 01, and the following are the parameters for configuring two energy meters.
345 345  
346 -[[image:https://wiki.dragino.com/images/1/13/Meter11.png||alt="Meter11.png" height="576" width="379"]]
450 +[[image:image-20220527094150-28.png]]
347 347  
348 -[[image:https://wiki.dragino.com/images/thumb/7/7e/Meter12.png/600px-Meter12.png||alt="Meter12.png" height="262" width="600"]]
349 349  
453 +[[image:image-20220527094224-29.png]]
454 +
350 350  PAYLOAD:01 08 DF 43 62
351 351  
352 352  * 08 DF is the valid value of the meter with device address 02.
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