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Version 41.13 by Xiaoling on 2022/06/01 14:12
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1 (% class="wikigeneratedid" %)
2 **Contents:**
3
4 {{toc/}}
5
6
7
8
9
10
11 = **1. Introduction** =
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 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:
19
20 [[image:image-20220527091852-1.png]]
21
22 Connection
23
24
25
26 [[image:image-20220527091942-2.png]](% style="display:none" %)
27
28 Connection
29
30
31 Related documents:
32
33 * [[Solar Pump with Dragino>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Relay_VFD/]] : System Structure
34 * [[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.
35 * [[Video Demo>>url:https://www.youtube.com/watch?v=TAFZ5eaf-MY&t=6s&ab_channel=XavierFlorensaBerenguer]]
36
37
38
39 == **1.2 Example 2: Connect to Pulse Counter** ==
40
41 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:
42
43 [[image:image-20220527092058-3.png]]
44
45 Connection
46
47
48
49 [[image:image-20220527092146-4.png]]
50
51 Connection
52
53
54 * [[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
55 * [[Dragino Solution in Farm>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/&file=Dragino%20on%20Farms.pptx]]
56
57 == ==
58
59 == **1.3 Example3: Use RS485-LN with energy meters** ==
60
61 === **1.3.1 OverView** ===
62
63 (((
64 **Note**：The specifications of each energy meter are different, please refer to your own energy meter specifications.
65 )))
66
67 (((
68 This example describes a single-phase meter.This is the connection between the RS485-LN and the energy meter.
69 )))
70
71 [[image:image-20220527092419-5.png]]
72
73 Connection1
74
75
76
77 (((
78 How to connect with Energy Meter：
79 )))
80
81 (((
82 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.
83 )))
84
85 (((
86 The RS485-LN can be powered by 7 ~~ 24V DC power source. Connection as below
87 )))
88
89 (((
90 Power Source VIN to RS485-LN VIN+
91 )))
92
93 (((
94 Power Source GND to RS485-LN VIN-
95 )))
96
97 (((
98 Once there is power, the RS485-LN will be on.
99 )))
100
101 [[image:image-20220527092514-6.png]]
102
103 Connection2
104
105
106 [[image:image-20220527092555-7.png]]
107
108 Connection3
109
110
111 === **1.3.2 How to use the parameters of the energy meter and MODBUS commands** ===
112
113 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.
114
115 [[image:image-20220527092629-8.png]]
116
117
118 (% class="box infomessage" %)
119 (((
120 **Example:** AT+COMMAND1=01 03 00 00 00 01 84 0A
121 )))
122
123 * The first byte : slave address code (=001～247)
124 * The second byte : read register value function code
125 * 3rd and 4th bytes: start address of register to be read
126 * 5th and 6th bytes: Number of registers to read
127 * 7th and 8th bytes: CRC16 checksum from bytes 1 to 6.
128
129 (((
130 How to parse the reading of the return command of the parameter：
131 )))
132
133 (% class="box infomessage" %)
134 (((
135 **Example:** RETURN1：01 03 02 08 FD 7E 05
136 )))
137
138 * The first byte ARD: slave address code (=001～254)
139 * The second byte: Return to read function code
140 * 3rd byte: total number of bytes
141 * 4th～5th bytes: register data
142 * The 6th and 7th bytes: CRC16 checksum
143 * 08 FD is register data. Use short integer 16 bits to convert to decimal, get 2301, then 230.1V is the voltage.
144
145 (% class="wikigeneratedid" %)
146 (((
147
148 )))
149
150 === **1.3.3 How to configure RS485-LN and parse output commands** ===
151
152 RS485-LN provides two configuration methods: AT COMMAND and DOWNLINK.
153
154
155 ==== **1.3.3.1 via AT COMMAND:** ====
156
157 First, we can use **AT+CFGDEV** to get the return value, and we can also judge whether the input parameters are correct.
158
159 (((
160 If the configured parameters and commands are incorrect, the return value is not obtained.
161 )))
162
163 [[image:image-20220527092748-9.png]]
164
165 AT COMMAND
166
167
168 (% class="box infomessage" %)
169 (((
170 AT+DATACUTx : This command defines how to handle the return from AT+COMMANDx, max reture length is 40 bytes. AT+DATACUTx=a,b,c
171 )))
172
173 a: length for the return of AT+COMMAND
174
175 b:1: grab valid value by byte, max 6 bytes. 2: grab valid value by bytes section, max 3 sections.
176
177 c: define the position for valid value.
178
179 [[image:image-20220527092936-10.png]]
180
181 AT COMMAND
182
183
184 PAYLOAD is available after the valid value is intercepted.
185
186
187 [[image:image-20220527093059-11.png]]
188
189 AT COMMAND
190
191
192 You can get configured PAYLOAD on TTN.
193
194 [[image:image-20220527093133-12.png]]
195
196 (((
197 AT COMMAND
198 )))
199
200 (((
201
202 )))
203
204 (((
205 (% style="color:#4f81bd" %)**Example**:
206
207 CMD1:Read current data with MODBUS command. address:0x03 AT+COMMAND1= 01 03 00 03 00 01,1
208 )))
209
210 (((
211 RETURN1:01 03 02 00 02 39 85 00 00(return data)
212 )))
213
214 (((
215 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.
216
217
218 )))
219
220 (((
221 CMD2:Read voltage data with MODBUS command. address:0x00 AT+COMMAND2= 01 03 00 00 00 01,1
222 )))
223
224 (((
225 RETURN2:01 03 02 08 DC BE 1D(return data)
226 )))
227
228 (((
229 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.
230
231
232 )))
233
234 (((
235 CMD3:Read total active energy data with MODBUS command. address:0x0031 AT+COMMAND3= 01 03 00 31 00 02,1
236 )))
237
238 (((
239 RETURN3:01 03 04 00 00 00 44 FA 00(return data)
240 )))
241
242 (((
243 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.
244 )))
245
246 (((
247 Payload:01 00 02 39 85 08 DC 00 00 00 44
248 )))
249
250 [[image:image-20220527093204-13.png]]
251
252 AT COMMAND
253
254
255 (% 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.**
256
257 [[image:image-20220527093251-14.png]]
258
259 AT COMMAND
260
261
262 ==== **1.3.3.2 via LoRaWAN DOWNLINK** ====
263
264 [[image:image-20220527093358-15.png]]
265
266 (((
267 DOWNLINK
268 )))
269
270 (((
271
272 )))
273
274 (((
275 (% style="color:#4f81bd" %)**Type Code 0xAF**
276 )))
277
278 (((
279 (% class="box infomessage" %)
280 (((
281 0xAF downlink command can be used to set AT+COMMANDx or AT+DATACUTx.
282 )))
283 )))
284
285 (((
286 Note: if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.
287 )))
288
289 (((
290 Format: AF MM NN LL XX XX XX XX YY
291 )))
292
293 (((
294 Where:
295 )))
296
297 (((
298 MM: the ATCOMMAND or AT+DATACUT to be set. Value from 01 ~~ 0F,
299 )))
300
301 (((
302 NN: 0: no CRC; 1: add CRC-16/MODBUS ; 2: set the AT+DATACUT value.
303 )))
304
305 (((
306 LL: The length of AT+COMMAND or AT+DATACUT command
307 )))
308
309 (((
310 XX XX XX XX: AT+COMMAND or AT+DATACUT command
311 )))
312
313 (((
314 YY: If YY=0, RS485-LN will execute the downlink command without uplink; if YY=1, RS485-LN
315 )))
316
317 (((
318 will execute an uplink after got this command.
319 )))
320
321 (((
322 (% style="color:#4f81bd" %)**Example:**
323 )))
324
325 (((
326 **AF 03 01 06 0A 05 00 04 00 01 00**: Same as AT+COMMAND3=0A 05 00 04 00 01,1
327 )))
328
329 [[image:image-20220527093430-16.png]]
330
331 DOWNLINK
332
333
334 [[image:image-20220527093508-17.png]]
335
336 DOWNLINK
337
338
339 [[image:image-20220527093530-18.png]]
340
341 DOWNLINK
342
343
344 [[image:image-20220527093607-19.png]]
345
346 DOWNLINK
347
348
349 [[image:image-20220527093628-20.png]]
350
351 DOWNLINK
352
353
354 === **1.3.4 How to configure and output commands for RS485 to USB** ===
355
356 (((
357 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.
358 )))
359
360 (((
361 First, connect the A+ and A- of the USB to the 485 A and 485 B of the energy meter.
362 )))
363
364 (((
365 Open the serial port debugging, set the send and receive to HEX.
366 )))
367
368 (((
369 Baud rate: 9600
370 )))
371
372 (((
373 check digit: Even
374 )))
375
376 [[image:image-20220527093708-21.png]]
377
378 USB
379
380
381 [[image:image-20220527093747-22.png]]
382
383 USB
384
385
386 (((
387 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.
388 )))
389
390 (((
391 (% style="color:#4f81bd" %)**Example:**  (%%)input：01 03 00 31 00 02 95 c4
392 )))
393
394 (((
395 output：01 03 04 00 00 00 42 7A 02
396 )))
397
398 [[image:image-20220527093821-23.png]]
399
400 USB
401
402
403 === **1.3.5 How to configure multiple devices and modify device addresses** ===
404
405 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.
406
407 (((
408 (((
409 Set the device address according to the parameters in the appendix of the MODBUS communication protocol.
410 )))
411 )))
412
413 [[image:image-20220527093849-24.png]]
414
415
416 **Example**:These two meters are examples of setting parameters and device addresses.
417
418 [[image:image-20220527093950-25.png]]
419
420 [[image:image-20220527094028-26.png]]
421
422 (((
423 (((
424 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.
425 )))
426 )))
427
428 (((
429 (((
430 We can use AT+CFGDEV to set the device address.
431 )))
432 )))
433
434 (((
435 (((
436 We modify the device address 01 of the first energy meter to 02.
437 )))
438 )))
439
440 [[image:image-20220527094100-27.png]]
441
442 (% class="box infomessage" %)
443 (((
444 **AT+CFGDEV:01 10 00 61 00 01 02 00 02,1**
445 )))
446
447 * 01:device adaress
448
449 * 10:function code
450
451 * 00 61：Register address
452
453 * 00 01：Number of Registers
454
455 * 02：Number of bytes
456
457 * 00 02：Modified device address
458
459 * 1：Check code
460
461 The device address setting of the energy meter is complete.
462
463 Another energy meter is a single active energy meter with a floating-point format.
464
465 Its default device address is 01, and the following are the parameters for configuring two energy meters.
466
467 [[image:image-20220527094150-28.png]]
468
469
470 [[image:image-20220527094224-29.png]]
471
472 **PAYLOAD:01 08 DF 43 62**
473
474 * 08 DF is the valid value of the meter with device address 02.
475 * 43 62 is the valid value of the meter with device address 01.
476
477
478 == 1.4 Example 4: Circuit Breaker Remote Open Close ==
479
480 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:
481
482 [[image:image-20220527094330-30.png]]
483
484 Connection
485
486 * [[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
487
488
489 == 1.5 Example 5: SEM Three Energy Meter with RS485-BL or RS485-LN ==
490
491 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:
492
493 * [[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
494
495 * [[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
496
497 == 1.6 Example 6:CEM C31 485-T1-MID Energy Meter with RS485-LN ==
498
499 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:
500
501 * [[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
502
503 == 1.7 Example 7:Schneider Electric PLC M221 with RS485-BL ==
504
505 [[image:image-20220527094556-31.png]]
506
507 Network Structure
508
509 * [[Reference Instruction>>url:https://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Schneider%20Electric%20PLC/]]