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Version 60.4 by Xiaoling on 2022/08/11 16:50
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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 [[image:image-20220527091852-1.png]]
22
23 Connection
24
25
26
27 [[image:image-20220527091942-2.png]](% style="display:none" %)
28
29 Connection
30
31
32 (% style="color:blue" %)**Related documents:**
33
34 * 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);"]]
35 * 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);"]]
36 * [[Video Demo>>url:https://www.youtube.com/watch?v=TAFZ5eaf-MY&t=6s&ab_channel=XavierFlorensaBerenguer]]
37
38
39
40 == **1.2 Example 2: Connect to Pulse Counter** ==
41
42
43 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:
44
45
46 [[image:image-20220527092058-3.png]]
47
48 Connection
49
50
51
52 [[image:image-20220527092146-4.png]]
53
54 Connection
55
56
57 (% style="color:blue" %)**Related documents:**
58
59 * 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"]]
60 * [[Dragino Solution in Farm>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/&file=Dragino%20on%20Farms.pptx]]
61
62
63
64 == **1.3 Example3: Use RS485-LN with energy meters** ==
65
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 [[image:image-20220527092419-5.png]]
79
80 Connection1
81
82
83
84 (((
85 (% style="color:blue" %)**How to connect with Energy Meter：**
86
87
88 )))
89
90 (((
91 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.
92 )))
93
94 (((
95 The RS485-LN can be powered by 7 ~~ 24V DC power source. Connection as below
96 )))
97
98 (((
99 Power Source VIN to RS485-LN VIN+
100 )))
101
102 (((
103 Power Source GND to RS485-LN VIN-
104 )))
105
106 (((
107 Once there is power, the RS485-LN will be on.
108
109
110 )))
111
112 [[image:image-20220527092514-6.png]]
113
114 Connection2
115
116
117
118 [[image:image-20220527092555-7.png]]
119
120 Connection3
121
122
123
124 === **1.3.2 How to use the parameters of the energy meter and MODBUS commands** ===
125
126
127 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.
128
129 [[image:image-20220601143257-10.png]]
130
131
132 (% style="color:blue" %)**Example:**(%%)  AT+COMMAND1=01 03 00 00 00 01 84 0A
133
134 * The first byte : slave address code (=001～247)
135 * The second byte : read register value function code
136 * 3rd and 4th bytes: start address of register to be read
137 * 5th and 6th bytes: Number of registers to read
138 * 7th and 8th bytes: CRC16 checksum from bytes 1 to 6.
139
140 (((
141
142
143
144 How to parse the reading of the return command of the parameter：
145
146 (% style="color:blue" %)**Example:**(%%) RETURN1：01 03 02 08 FD 7E 05
147 )))
148
149 * The first byte ARD: slave address code (=001～254)
150 * The second byte: Return to read function code
151 * 3rd byte: total number of bytes
152 * 4th～5th bytes: register data
153 * The 6th and 7th bytes: CRC16 checksum
154 * 08 FD is register data. Use short integer 16 bits to convert to decimal, get 2301, then 230.1V is the voltage.
155
156 (% class="wikigeneratedid" %)
157 (((
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
171 ==== **1.3.3.1 via AT COMMAND** ====
172
173
174 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.
175
176 (((
177 If the configured parameters and commands are incorrect, the return value is not obtained.
178 )))
179
180 [[image:image-20220601143201-9.png]]
181
182 AT COMMAND
183
184
185 (% class="box infomessage" %)
186 (((
187 (% _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
188 )))
189
190 a:  length for the return of AT+COMMAND
191
192 b: 1: grab valid value by byte, max 6 bytes;  2: grab valid value by bytes section, max 3 sections.
193
194 c:  define the position for valid value.
195
196 [[image:image-20220601143115-8.png]]
197
198 AT COMMAND
199
200
201
202 PAYLOAD is available after the valid value is intercepted.
203
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
225 (((
226 (% style="color:blue" %)**Example**:
227
228 (% style="color:red" %)**CMD1:**(%%) Read current data with MODBUS command. address: 0x03 AT+COMMAND1= 01 03 00 03 00 01,1
229 )))
230
231 (((
232 RETURN1: 01 03 02 00 02 39 85 00 00(return data)
233 )))
234
235 (((
236 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.
237
238
239 )))
240
241 (((
242 (% style="color:red" %)**CMD2: **(%%)Read voltage data with MODBUS command. address: 0x00 AT+COMMAND2= 01 03 00 00 00 01,1
243 )))
244
245 (((
246 RETURN2: 01 03 02 08 DC BE 1D(return data)
247 )))
248
249 (((
250 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.
251
252
253 )))
254
255 (((
256 (% style="color:red" %)**CMD3:**(%%) Read total active energy data with MODBUS command. address: 0x0031 AT+COMMAND3= 01 03 00 31 00 02,1
257 )))
258
259 (((
260 RETURN3: 01 03 04 00 00 00 44 FA 00(return data)
261 )))
262
263 (((
264 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.
265 )))
266
267 (((
268 Payload: 01 00 02 39 85 08 DC 00 00 00 44
269 )))
270
271 [[image:image-20220601142936-6.png]]
272
273 AT COMMAND
274
275
276
277 (% 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.**
278
279
280 [[image:image-20220601143642-2.png]]
281
282 AT COMMAND
283
284
285
286 ==== **1.3.3.2 via LoRaWAN DOWNLINK** ====
287
288
289 [[image:image-20220527093358-15.png]]
290
291 (((
292 DOWNLINK
293 )))
294
295 (((
296
297 )))
298
299 (((
300 (% style="color:#4f81bd" %)**Type Code 0xAF**
301 )))
302
303 (((
304 (% class="box infomessage" %)
305 (((
306 0xAF downlink command can be used to set AT+COMMANDx or AT+DATACUTx.
307 )))
308 )))
309
310 (((
311 (% style="color:red" %)**Note: if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.**
312
313
314 )))
315
316 (((
317 Format: AF MM NN LL XX XX XX XX YY
318 )))
319
320 (((
321 Where:
322 )))
323
324 (((
325 MM: the ATCOMMAND or AT+DATACUT to be set. Value from 01 ~~ 0F,
326 )))
327
328 (((
329 NN: 0: no CRC; 1: add CRC-16/MODBUS ; 2: set the AT+DATACUT value.
330 )))
331
332 (((
333 LL: The length of AT+COMMAND or AT+DATACUT command
334 )))
335
336 (((
337 XX XX XX XX: AT+COMMAND or AT+DATACUT command
338 )))
339
340 (((
341 YY: If YY=0, RS485-LN will execute the downlink command without uplink; if YY=1, RS485-LN
342 )))
343
344 (((
345 will execute an uplink after got this command.
346 )))
347
348 (((
349
350
351 (% style="color:blue" %)**Example:**
352 )))
353
354 (((
355 **AF 03 01 06 0A 05 00 04 00 01 00**: Same as AT+COMMAND3=0A 05 00 04 00 01,1
356 )))
357
358 [[image:image-20220601144149-6.png]]
359
360 DOWNLINK
361
362
363
364 [[image:image-20220601143803-3.png]]
365
366 DOWNLINK
367
368
369
370 [[image:image-20220601144053-5.png]]
371
372 DOWNLINK
373
374
375
376 [[image:image-20220601143921-4.png]]
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378 DOWNLINK
379
380
381
382 [[image:image-20220601142805-5.png]]
383
384 DOWNLINK
385
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 [[image:image-20220527093950-25.png]]
464
465
466 [[image:image-20220527094028-26.png]]
467
468
469 (((
470 (((
471 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.
472 )))
473 )))
474
475 (((
476 (((
477 We can use (% style="color:blue" %)**AT+CFGDEV**(%%) to set the device address.
478 )))
479 )))
480
481 (((
482 (((
483 We modify the device address 01 of the first energy meter to 02.
484 )))
485 )))
486
487 [[image:image-20220601142354-2.png]]
488
489
490 (% class="box infomessage" %)
491 (((
492 **AT+CFGDEV:01 10 00 61 00 01 02 00 02,1**
493 )))
494
495 * 01:device adaress
496
497 * 10:function code
498
499 * 00 61：Register address
500
501 * 00 01：Number of Registers
502
503 * 02：Number of bytes
504
505 * 00 02：Modified device address
506
507 * 1：Check code
508
509 The device address setting of the energy meter is complete.
510
511 Another energy meter is a single active energy meter with a floating-point format.
512
513 Its default device address is 01, and the following are the parameters for configuring two energy meters.
514
515 [[image:image-20220601142452-3.png]]
516
517
518 [[image:image-20220601142607-4.png]]
519
520
521 (% style="color:blue" %)**PAYLOAD: 01 08 DF 43 62**
522
523 * 08 DF is the valid value of the meter with device address 02.
524 * 43 62 is the valid value of the meter with device address 01.
525
526 == 1.4 Example 4: Circuit Breaker Remote Open Close ==
527
528
529 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.
530
531 The structure is like below:
532
533 [[image:image-20220527094330-30.png]]
534
535 Connection
536
537
538 * 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"]]
539
540
541
542 == 1.5 Example 5: SEM Three Energy Meter with RS485-BL or RS485-LN ==
543
544
545 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:
546
547 * 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);"]]
548 * 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"]]
549
550
551
552 == 1.6 Example 6: CEM C31 485-T1-MID Energy Meter with RS485-LN ==
553
554
555 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:
556
557 * 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);"]]
558
559
560
561 == 1.7 Example 7: Schneider Electric PLC M221 with RS485-BL ==
562
563
564 [[image:image-20220527094556-31.png]]
565
566 Network Structure
567
568
569 * [[Reference Instruction>>url:https://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Schneider%20Electric%20PLC/]]