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Version 60.12 by Xiaoling on 2022/12/14 14:22
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1 **Table of Contents:**
2
3 {{toc/}}
4
5
6
7
8
9
10 = 1. Introduction =
11
12
13 This article provide the examples for RS485-LN to connect to different type of RS485 sensors.
14
15
16 == 1.1 Example 1: Connect to Leak relay and VFD ==
17
18
19 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:
20
21
22 [[image:image-20220527091852-1.png||height="547" width="994"]]
23
24 **Connection**
25
26
27
28 [[image:image-20220527091942-2.png]](% style="display:none" %)
29
30 **Connection**
31
32
33 (% style="color:blue" %)**Related documents:**
34
35 * System Structure:  [[Solar Pump with Dragino>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Relay_VFD/||_mstmutation="1" style="background-color: rgb(255, 255, 255);"]]
36 * Explanation on how to integrate to Node-red and to the Mobile Phone, and with link to the Github code:  [[Configure Manual>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Relay_VFD/||_mstmutation="1" style="background-color: rgb(255, 255, 255);"]]
37 * [[Video Demo>>url:https://www.youtube.com/watch?v=TAFZ5eaf-MY&t=6s&ab_channel=XavierFlorensaBerenguer]]
38
39
40
41 == 1.2 Example 2: Connect to Pulse Counter ==
42
43
44 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:
45
46
47 [[image:image-20220527092058-3.png||height="552" width="905"]]
48
49 **Connection**
50
51
52
53 [[image:image-20220527092146-4.png||height="507" width="906"]]
54
55 **Connection**
56
57
58 (% style="color:blue" %)**Related documents:**
59
60 * Configure Document:  [[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/||_mstmutation="1"]]
61 * [[Dragino Solution in Farm>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/&file=Dragino%20on%20Farms.pptx]]
62
63
64
65 == 1.3 Example 3: Use RS485-LN with energy meters ==
66
67 === 1.3.1 OverView ===
68
69
70 (((
71 (% style="color:red" %)**Note**：**The specifications of each energy meter are different, please refer to your own energy meter specifications.**
72 )))
73
74 (((
75 This example describes a single-phase meter.This is the connection between the RS485-LN and the energy meter.
76
77
78 )))
79
80 [[image:image-20220527092419-5.png]]
81
82 **Connection1**
83
84
85
86 (((
87 (% style="color:blue" %)**How to connect with Energy Meter：**
88
89
90 )))
91
92 (((
93 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.
94 )))
95
96 (((
97 The RS485-LN can be powered by 7 ~~ 24V DC power source. Connection as below
98 )))
99
100 (((
101 Power Source VIN to RS485-LN VIN+
102 )))
103
104 (((
105 Power Source GND to RS485-LN VIN-
106 )))
107
108 (((
109 Once there is power, the RS485-LN will be on.
110
111
112 )))
113
114 [[image:image-20220527092514-6.png]]
115
116 **Connection2**
117
118
119
120 [[image:image-20220527092555-7.png]]
121
122 **Connection3**
123
124
125 === 1.3.2 How to use the parameters of the energy meter and MODBUS commands ===
126
127
128 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.
129
130 [[image:image-20220601143257-10.png]]
131
132
133 (% style="color:blue" %)**Example:**(%%)  AT+COMMAND1=01 03 00 00 00 01 84 0A
134
135 * The first byte : slave address code (=001～247)
136 * The second byte : read register value function code
137 * 3rd and 4th bytes: start address of register to be read
138 * 5th and 6th bytes: Number of registers to read
139 * 7th and 8th bytes: CRC16 checksum from bytes 1 to 6.
140
141 (((
142
143
144
145 How to parse the reading of the return command of the parameter：
146
147 (% style="color:blue" %)**Example:**(%%) RETURN1：01 03 02 08 FD 7E 05
148 )))
149
150 * The first byte ARD: slave address code (=001～254)
151 * The second byte: Return to read function code
152 * 3rd byte: total number of bytes
153 * 4th～5th bytes: register data
154 * The 6th and 7th bytes: CRC16 checksum
155 * 08 FD is register data. Use short integer 16 bits to convert to decimal, get 2301, then 230.1V is the voltage.
156
157 (% class="wikigeneratedid" %)
158 (((
159
160
161
162 )))
163
164 === 1.3.3 How to configure RS485-LN and parse output commands ===
165
166
167 RS485-LN provides two configuration methods: AT COMMAND and DOWNLINK.
168
169
170 ==== 1.3.3.1 via AT COMMAND ====
171
172
173 First, we can use (% style="color:blue" %)**AT+CFGDEV**(%%) to get the return value, and we can also judge whether the input parameters are correct.
174
175 (((
176 If the configured parameters and commands are incorrect, the return value is not obtained.
177
178
179 )))
180
181 [[image:image-20220601143201-9.png]]
182
183 **AT COMMAND**
184
185
186 (% class="box infomessage" %)
187 (((
188 (% _mstmutation="1" %)**AT+DATACUTx **(%%):  This command defines how to handle the return from AT+COMMANDx, max reture length is 40 bytes. AT+DATACUTx=a,b,c
189 )))
190
191 a:  length for the return of AT+COMMAND
192
193 b: 1: grab valid value by byte, max 6 bytes;  2: grab valid value by bytes section, max 3 sections.
194
195 c:  define the position for valid value.
196
197 [[image:image-20220601143115-8.png]]
198
199 **AT COMMAND**
200
201
202
203 PAYLOAD is available after the valid value is intercepted.
204
205 [[image:image-20220601143046-7.png]]
206
207 **AT COMMAND**
208
209
210
211 You can get configured PAYLOAD on TTN.
212
213 [[image:image-20220601143519-1.png]]
214
215 (((
216 **AT COMMAND**
217 )))
218
219 (((
220
221 )))
222
223 (((
224 (% style="color:blue" %)**Example**:
225
226
227 (% style="color:red" %)**CMD1:**(%%) Read current data with MODBUS command. address: 0x03 AT+COMMAND1= 01 03 00 03 00 01,1
228 )))
229
230 (((
231 RETURN1: 01 03 02 00 02 39 85 00 00(return data)
232 )))
233
234 (((
235 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.
236
237
238 )))
239
240 (((
241 (% style="color:red" %)**CMD2: **(%%)Read voltage data with MODBUS command. address: 0x00 AT+COMMAND2= 01 03 00 00 00 01,1
242 )))
243
244 (((
245 RETURN2: 01 03 02 08 DC BE 1D(return data)
246 )))
247
248 (((
249 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.
250
251
252 )))
253
254 (((
255 (% style="color:red" %)**CMD3:**(%%) Read total active energy data with MODBUS command. address: 0x0031 AT+COMMAND3= 01 03 00 31 00 02,1
256 )))
257
258 (((
259 RETURN3: 01 03 04 00 00 00 44 FA 00(return data)
260 )))
261
262 (((
263 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.
264 )))
265
266 (((
267 Payload: 01 00 02 39 85 08 DC 00 00 00 44
268
269
270 )))
271
272 [[image:image-20220601142936-6.png]]
273
274 AT COMMAND
275
276
277
278 (% style="color:blue" %)**01 is device address,00 02 is the current, 08 DC is the voltage,00 00 00 44 is the total active energy.**
279
280
281 [[image:image-20220601143642-2.png]]
282
283 AT COMMAND
284
285
286
287 ==== 1.3.3.2 via LoRaWAN DOWNLINK ====
288
289
290 [[image:image-20220527093358-15.png]]
291
292 (((
293 **DOWNLINK**
294 )))
295
296 (((
297
298 )))
299
300 (((
301 (% style="color:blue" %)**Type Code 0xAF**
302 )))
303
304 (((
305 (% class="box infomessage" %)
306 (((
307 0xAF downlink command can be used to set AT+COMMANDx or AT+DATACUTx.
308 )))
309 )))
310
311 (((
312 (% style="color:red" %)**Note: if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.**
313
314
315 )))
316
317 (((
318 Format: AF MM NN LL XX XX XX XX YY
319 )))
320
321 (((
322 Where:
323 )))
324
325 (((
326 MM: the ATCOMMAND or AT+DATACUT to be set. Value from 01 ~~ 0F,
327 )))
328
329 (((
330 NN: 0: no CRC; 1: add CRC-16/MODBUS ; 2: set the AT+DATACUT value.
331 )))
332
333 (((
334 LL: The length of AT+COMMAND or AT+DATACUT command
335 )))
336
337 (((
338 XX XX XX XX: AT+COMMAND or AT+DATACUT command
339 )))
340
341 (((
342 YY: If YY=0, RS485-LN will execute the downlink command without uplink; if YY=1, RS485-LN
343 )))
344
345 (((
346 will execute an uplink after got this command.
347 )))
348
349 (((
350
351
352 (% style="color:blue" %)**Example:**
353 )))
354
355 (((
356 **AF 03 01 06 0A 05 00 04 00 01 00**: Same as AT+COMMAND3=0A 05 00 04 00 01,1
357 )))
358
359 [[image:image-20220601144149-6.png]]
360
361 **DOWNLINK**
362
363
364
365 [[image:image-20220601143803-3.png]]
366
367 **DOWNLINK**
368
369
370
371 [[image:image-20220601144053-5.png]]
372
373 **DOWNLINK**
374
375
376
377 [[image:image-20220601143921-4.png]]
378
379 **DOWNLINK**
380
381
382
383 [[image:image-20220601142805-5.png]]
384
385 **DOWNLINK**
386
387
388 === 1.3.4 How to configure and output commands for RS485 to USB ===
389
390
391 (((
392 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.
393 )))
394
395 (((
396 First, connect the A+ and A- of the USB to the 485 A and 485 B of the energy meter.
397 )))
398
399 (((
400 Open the serial port debugging, set the send and receive to HEX.
401 )))
402
403 (((
404 Baud rate: 9600
405 )))
406
407 (((
408 check digit: Even
409
410
411 )))
412
413 [[image:image-20220527093708-21.png]]
414
415 **USB**
416
417
418
419 [[image:image-20220527093747-22.png]]
420
421 **USB**
422
423
424
425 (((
426 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.
427
428
429 )))
430
431 (((
432 (% style="color:blue" %)**Example:**  (%%)input：01 03 00 31 00 02 95 c4
433 )))
434
435 (((
436 output：01 03 04 00 00 00 42 7A 02
437
438
439 )))
440
441 [[image:image-20220527093821-23.png]]
442
443 **USB**
444
445
446
447 === 1.3.5 How to configure multiple devices and modify device addresses ===
448
449
450 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.
451
452 (((
453 (((
454 Set the device address according to the parameters in the appendix of the MODBUS communication protocol.
455 )))
456 )))
457
458 [[image:image-20220601142044-1.png]]
459
460
461 (% style="color:blue" %)**Example**(%%): These two meters are examples of setting parameters and device addresses.
462
463
464 [[image:image-20220527093950-25.png]]
465
466
467 [[image:image-20220527094028-26.png]]
468
469
470 (((
471 (((
472 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.
473 )))
474 )))
475
476 (((
477 (((
478 We can use (% style="color:blue" %)**AT+CFGDEV**(%%) to set the device address.
479 )))
480 )))
481
482 (((
483 (((
484 We modify the device address 01 of the first energy meter to 02.
485 )))
486 )))
487
488 [[image:image-20220601142354-2.png]]
489
490
491 (% class="box infomessage" %)
492 (((
493 **AT+CFGDEV:01 10 00 61 00 01 02 00 02,1**
494 )))
495
496 * 01: device adaress
497
498 * 10: function code
499
500 * 00 61：Register address
501
502 * 00 01：Number of Registers
503
504 * 02：Number of bytes
505
506 * 00 02：Modified device address
507
508 * 1：Check code
509
510 The device address setting of the energy meter is complete.
511
512 Another energy meter is a single active energy meter with a floating-point format.
513
514 Its default device address is 01, and the following are the parameters for configuring two energy meters.
515
516 [[image:image-20220601142452-3.png]]
517
518
519 [[image:image-20220601142607-4.png]]
520
521
522 (% style="color:blue" %)**PAYLOAD: 01 08 DF 43 62**
523
524 * 08 DF is the valid value of the meter with device address 02.
525 * 43 62 is the valid value of the meter with device address 01.
526
527 (% style="display:none" %) (%%)
528
529 (% style="display:none" %) (%%)
530
531 == 1.4 Example 4: Circuit Breaker Remote Open Close ==
532
533
534 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.
535
536 The structure is like below:
537
538 [[image:image-20220527094330-30.png]]
539
540 Connection
541
542
543 * Configure Documen:  [[Circuit Breaker Remote Open Close>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Circuit_Breaker_Remote_Open_Close/||_mstmutation="1"]]
544
545
546
547 == 1.5 Example 5: SEM Three Energy Meter with RS485-BL or RS485-LN ==
548
549
550 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:
551
552 * Configure Document For RS485-BL:  [[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||_mstmutation="1" style="background-color: rgb(255, 255, 255);"]]
553 * Configure Document for RS485-LN:  [[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||_mstmutation="1"]]
554
555
556
557 == 1.6 Example 6: CEM C31 485-T1-MID Energy Meter with RS485-LN ==
558
559
560 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:
561
562 * Configure Document For RS485-LN:  [[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||_mstmutation="1" style="background-color: rgb(255, 255, 255);"]]
563
564
565
566 == 1.7 Example 7: Schneider Electric PLC M221 with RS485-BL ==
567
568
569 [[image:image-20220527094556-31.png]]
570
571 Network Structure
572
573
574 * [[Reference Instruction>>url:https://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Schneider%20Electric%20PLC/]]