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Version 57.13 by Xiaoling on 2022/07/14 09:49
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1 (% class="wikigeneratedid" %)
2 *
3 ** Table of** **Contents:
4
5 {{toc/}}
6
7
8
9
10
11
12 = **1. Introduction** =
13
14
15 This article provide the examples for RS485-LN to connect to different type of RS485 sensors.
16
17
18 == **1.1 Example 1: Connect to Leak relay and VFD** ==
19
20
21 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:
22
23 [[image:image-20220527091852-1.png]]
24
25 Connection
26
27
28
29 [[image:image-20220527091942-2.png]](% style="display:none" %)
30
31 Connection
32
33
34 Related documents:
35
36 * [[Solar Pump with Dragino>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Relay_VFD/]] : System Structure
37 * [[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.
38 * [[Video Demo>>url:https://www.youtube.com/watch?v=TAFZ5eaf-MY&t=6s&ab_channel=XavierFlorensaBerenguer]]
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 * 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/]]
58 * [[Dragino Solution in Farm>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/&file=Dragino%20on%20Farms.pptx]]
59
60 == **1.3 Example3: Use RS485-LN with energy meters** ==
61
62 === **1.3.1 OverView** ===
63
64
65 (((
66 (% style="color:red" %)**Note**：The specifications of each energy meter are different, please refer to your own energy meter specifications.
67 )))
68
69 (((
70 This example describes a single-phase meter.This is the connection between the RS485-LN and the energy meter.
71 )))
72
73 [[image:image-20220527092419-5.png]]
74
75 Connection1
76
77
78
79 (((
80 **How to connect with Energy Meter：**
81
82
83 )))
84
85 (((
86 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.
87 )))
88
89 (((
90 The RS485-LN can be powered by 7 ~~ 24V DC power source. Connection as below
91 )))
92
93 (((
94 Power Source VIN to RS485-LN VIN+
95 )))
96
97 (((
98 Power Source GND to RS485-LN VIN-
99 )))
100
101 (((
102 Once there is power, the RS485-LN will be on.
103 )))
104
105 [[image:image-20220527092514-6.png]]
106
107 Connection2
108
109
110
111 [[image:image-20220527092555-7.png]]
112
113 Connection3
114
115
116 === **1.3.2 How to use the parameters of the energy meter and MODBUS commands** ===
117
118
119 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.
120
121 [[image:image-20220601143257-10.png]]
122
123
124 (% style="color:blue" %)**Example:**(%%)  AT+COMMAND1=01 03 00 00 00 01 84 0A
125
126 * The first byte : slave address code (=001～247)
127 * The second byte : read register value function code
128 * 3rd and 4th bytes: start address of register to be read
129 * 5th and 6th bytes: Number of registers to read
130 * 7th and 8th bytes: CRC16 checksum from bytes 1 to 6.
131
132 (((
133
134
135
136 How to parse the reading of the return command of the parameter：
137
138 (% style="color:blue" %)**Example:**(%%) RETURN1：01 03 02 08 FD 7E 05
139 )))
140
141 * The first byte ARD: slave address code (=001～254)
142 * The second byte: Return to read function code
143 * 3rd byte: total number of bytes
144 * 4th～5th bytes: register data
145 * The 6th and 7th bytes: CRC16 checksum
146 * 08 FD is register data. Use short integer 16 bits to convert to decimal, get 2301, then 230.1V is the voltage.
147
148 (% class="wikigeneratedid" %)
149 (((
150
151
152
153
154 )))
155
156 === **1.3.3 How to configure RS485-LN and parse output commands** ===
157
158
159 RS485-LN provides two configuration methods: AT COMMAND and DOWNLINK.
160
161
162 ==== **1.3.3.1 via AT COMMAND** ====
163
164
165 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.
166
167 (((
168 If the configured parameters and commands are incorrect, the return value is not obtained.
169 )))
170
171 [[image:image-20220601143201-9.png]]
172
173 AT COMMAND
174
175
176 (% class="box infomessage" %)
177 (((
178 **AT+DATACUTx **:  This command defines how to handle the return from AT+COMMANDx, max reture length is 40 bytes. AT+DATACUTx=a,b,c
179 )))
180
181 a:  length for the return of AT+COMMAND
182
183 b: 1: grab valid value by byte, max 6 bytes;  2: grab valid value by bytes section, max 3 sections.
184
185 c:  define the position for valid value.
186
187 [[image:image-20220601143115-8.png]]
188
189 AT COMMAND
190
191
192
193 PAYLOAD is available after the valid value is intercepted.
194
195
196 [[image:image-20220601143046-7.png]]
197
198 AT COMMAND
199
200
201
202 You can get configured PAYLOAD on TTN.
203
204 [[image:image-20220601143519-1.png]]
205
206 (((
207 AT COMMAND
208 )))
209
210 (((
211
212 )))
213
214 (((
215 (% style="color:blue" %)**Example**:
216
217 CMD1: Read current data with MODBUS command. address: 0x03 AT+COMMAND1= 01 03 00 03 00 01,1
218 )))
219
220 (((
221 RETURN1: 01 03 02 00 02 39 85 00 00(return data)
222 )))
223
224 (((
225 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.
226
227
228 )))
229
230 (((
231 CMD2: Read voltage data with MODBUS command. address: 0x00 AT+COMMAND2= 01 03 00 00 00 01,1
232 )))
233
234 (((
235 RETURN2: 01 03 02 08 DC BE 1D(return data)
236 )))
237
238 (((
239 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.
240
241
242 )))
243
244 (((
245 CMD3: Read total active energy data with MODBUS command. address: 0x0031 AT+COMMAND3= 01 03 00 31 00 02,1
246 )))
247
248 (((
249 RETURN3: 01 03 04 00 00 00 44 FA 00(return data)
250 )))
251
252 (((
253 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.
254 )))
255
256 (((
257 Payload: 01 00 02 39 85 08 DC 00 00 00 44
258 )))
259
260 [[image:image-20220601142936-6.png]]
261
262 AT COMMAND
263
264
265 (% 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.**
266
267
268 [[image:image-20220601143642-2.png]]
269
270 AT COMMAND
271
272
273 ==== **1.3.3.2 via LoRaWAN DOWNLINK** ====
274
275
276 [[image:image-20220527093358-15.png]]
277
278 (((
279 DOWNLINK
280 )))
281
282 (((
283
284 )))
285
286 (((
287 (% style="color:#4f81bd" %)**Type Code 0xAF**
288 )))
289
290 (((
291 (% class="box infomessage" %)
292 (((
293 0xAF downlink command can be used to set AT+COMMANDx or AT+DATACUTx.
294 )))
295 )))
296
297 (((
298 (% style="color:red" %)Note: if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.
299 )))
300
301 (((
302 Format: AF MM NN LL XX XX XX XX YY
303 )))
304
305 (((
306 Where:
307 )))
308
309 (((
310 MM: the ATCOMMAND or AT+DATACUT to be set. Value from 01 ~~ 0F,
311 )))
312
313 (((
314 NN: 0: no CRC; 1: add CRC-16/MODBUS ; 2: set the AT+DATACUT value.
315 )))
316
317 (((
318 LL: The length of AT+COMMAND or AT+DATACUT command
319 )))
320
321 (((
322 XX XX XX XX: AT+COMMAND or AT+DATACUT command
323 )))
324
325 (((
326 YY: If YY=0, RS485-LN will execute the downlink command without uplink; if YY=1, RS485-LN
327 )))
328
329 (((
330 will execute an uplink after got this command.
331 )))
332
333 (((
334
335
336 (% style="color:blue" %)**Example:**
337 )))
338
339 (((
340 **AF 03 01 06 0A 05 00 04 00 01 00**: Same as AT+COMMAND3=0A 05 00 04 00 01,1
341 )))
342
343 [[image:image-20220601144149-6.png]]
344
345 DOWNLINK
346
347
348
349 [[image:image-20220601143803-3.png]]
350
351 DOWNLINK
352
353
354
355 [[image:image-20220601144053-5.png]]
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357 DOWNLINK
358
359
360
361 [[image:image-20220601143921-4.png]]
362
363 DOWNLINK
364
365
366
367 [[image:image-20220601142805-5.png]]
368
369 DOWNLINK
370
371
372 === **1.3.4 How to configure and output commands for RS485 to USB** ===
373
374 (((
375 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.
376 )))
377
378 (((
379 First, connect the A+ and A- of the USB to the 485 A and 485 B of the energy meter.
380 )))
381
382 (((
383 Open the serial port debugging, set the send and receive to HEX.
384 )))
385
386 (((
387 Baud rate: 9600
388 )))
389
390 (((
391 check digit: Even
392
393
394 )))
395
396 [[image:image-20220527093708-21.png]]
397
398 USB
399
400
401
402 [[image:image-20220527093747-22.png]]
403
404 USB
405
406
407
408 (((
409 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.
410
411
412 )))
413
414 (((
415 (% style="color:blue" %)**Example:**  (%%)input：01 03 00 31 00 02 95 c4
416 )))
417
418 (((
419 output：01 03 04 00 00 00 42 7A 02
420
421
422 )))
423
424 [[image:image-20220527093821-23.png]]
425
426 USB
427
428
429 === **1.3.5 How to configure multiple devices and modify device addresses** ===
430
431
432 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.
433
434 (((
435 (((
436 Set the device address according to the parameters in the appendix of the MODBUS communication protocol.
437 )))
438 )))
439
440 [[image:image-20220601142044-1.png]]
441
442
443 (% style="color:blue" %)**Example**(%%): These two meters are examples of setting parameters and device addresses.
444
445 [[image:image-20220527093950-25.png]]
446
447
448 [[image:image-20220527094028-26.png]]
449
450
451 (((
452 (((
453 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.
454 )))
455 )))
456
457 (((
458 (((
459 We can use **AT+CFGDEV** to set the device address.
460 )))
461 )))
462
463 (((
464 (((
465 We modify the device address 01 of the first energy meter to 02.
466 )))
467 )))
468
469 [[image:image-20220601142354-2.png]]
470
471
472 (% class="box infomessage" %)
473 (((
474 **AT+CFGDEV:01 10 00 61 00 01 02 00 02,1**
475 )))
476
477 * 01:device adaress
478
479 * 10:function code
480
481 * 00 61：Register address
482
483 * 00 01：Number of Registers
484
485 * 02：Number of bytes
486
487 * 00 02：Modified device address
488
489 * 1：Check code
490
491 The device address setting of the energy meter is complete.
492
493 Another energy meter is a single active energy meter with a floating-point format.
494
495 Its default device address is 01, and the following are the parameters for configuring two energy meters.
496
497 [[image:image-20220601142452-3.png]]
498
499
500 [[image:image-20220601142607-4.png]]
501
502
503 **PAYLOAD:01 08 DF 43 62**
504
505 * 08 DF is the valid value of the meter with device address 02.
506 * 43 62 is the valid value of the meter with device address 01.
507
508
509
510
511 == 1.4 Example 4: Circuit Breaker Remote Open Close ==
512
513
514 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.
515
516 The structure is like below:
517
518 [[image:image-20220527094330-30.png]]
519
520 Connection
521
522
523 * 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/]]
524
525
526
527
528 == 1.5 Example 5: SEM Three Energy Meter with RS485-BL or RS485-LN ==
529
530
531 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:
532
533 * 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||style="background-color: rgb(255, 255, 255);"]]
534 * 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]]
535
536
537
538
539 == 1.6 Example 6:CEM C31 485-T1-MID Energy Meter with RS485-LN ==
540
541
542 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:
543
544 * 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||style="background-color: rgb(255, 255, 255);"]]
545
546
547
548
549 == 1.7 Example 7:Schneider Electric PLC M221 with RS485-BL ==
550
551
552 [[image:image-20220527094556-31.png]]
553
554 Network Structure
555
556
557 * [[Reference Instruction>>url:https://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Schneider%20Electric%20PLC/]]