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Version 41.11 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 * [[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
54 * [[Dragino Solution in Farm>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/&file=Dragino%20on%20Farms.pptx]]
55
56 == ==
57
58 == **1.3 Example3: Use RS485-LN with energy meters** ==
59
60 === **1.3.1 OverView** ===
61
62 (((
63 **Note**：The specifications of each energy meter are different, please refer to your own energy meter specifications.
64 )))
65
66 (((
67 This example describes a single-phase meter.This is the connection between the RS485-LN and the energy meter.
68 )))
69
70 [[image:image-20220527092419-5.png]]
71
72 Connection1
73
74
75 (((
76 How to connect with Energy Meter：
77 )))
78
79 (((
80 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.
81 )))
82
83 (((
84 The RS485-LN can be powered by 7 ~~ 24V DC power source. Connection as below
85 )))
86
87 (((
88 Power Source VIN to RS485-LN VIN+
89 )))
90
91 (((
92 Power Source GND to RS485-LN VIN-
93 )))
94
95 (((
96 Once there is power, the RS485-LN will be on.
97 )))
98
99 [[image:image-20220527092514-6.png]]
100
101 Connection2
102
103
104 [[image:image-20220527092555-7.png]]
105
106 Connection3
107
108
109 === **1.3.2 How to use the parameters of the energy meter and MODBUS commands** ===
110
111 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.
112
113 [[image:image-20220527092629-8.png]]
114
115
116 (% class="box infomessage" %)
117 (((
118 **Example:** AT+COMMAND1=01 03 00 00 00 01 84 0A
119 )))
120
121 * The first byte : slave address code (=001～247)
122 * The second byte : read register value function code
123 * 3rd and 4th bytes: start address of register to be read
124 * 5th and 6th bytes: Number of registers to read
125 * 7th and 8th bytes: CRC16 checksum from bytes 1 to 6.
126
127 (((
128 How to parse the reading of the return command of the parameter：
129 )))
130
131 (% class="box infomessage" %)
132 (((
133 **Example:** RETURN1：01 03 02 08 FD 7E 05
134 )))
135
136 * The first byte ARD: slave address code (=001～254)
137 * The second byte: Return to read function code
138 * 3rd byte: total number of bytes
139 * 4th～5th bytes: register data
140 * The 6th and 7th bytes: CRC16 checksum
141 * 08 FD is register data. Use short integer 16 bits to convert to decimal, get 2301, then 230.1V is the voltage.
142
143 (% class="wikigeneratedid" %)
144 (((
145
146 )))
147
148 === **1.3.3 How to configure RS485-LN and parse output commands** ===
149
150 RS485-LN provides two configuration methods: AT COMMAND and DOWNLINK.
151
152
153 ==== **1.3.3.1 via AT COMMAND:** ====
154
155 First, we can use **AT+CFGDEV** to get the return value, and we can also judge whether the input parameters are correct.
156
157 (((
158 If the configured parameters and commands are incorrect, the return value is not obtained.
159 )))
160
161 [[image:image-20220527092748-9.png]]
162
163 AT COMMAND
164
165
166 (% class="box infomessage" %)
167 (((
168 AT+DATACUTx : This command defines how to handle the return from AT+COMMANDx, max reture length is 40 bytes. AT+DATACUTx=a,b,c
169 )))
170
171 a: length for the return of AT+COMMAND
172
173 b:1: grab valid value by byte, max 6 bytes. 2: grab valid value by bytes section, max 3 sections.
174
175 c: define the position for valid value.
176
177 [[image:image-20220527092936-10.png]]
178
179 AT COMMAND
180
181
182 PAYLOAD is available after the valid value is intercepted.
183
184
185 [[image:image-20220527093059-11.png]]
186
187 AT COMMAND
188
189
190 You can get configured PAYLOAD on TTN.
191
192 [[image:image-20220527093133-12.png]]
193
194 (((
195 AT COMMAND
196 )))
197
198 (((
199
200 )))
201
202 (((
203 (% style="color:#4f81bd" %)**Example**:
204
205 CMD1:Read current data with MODBUS command. address:0x03 AT+COMMAND1= 01 03 00 03 00 01,1
206 )))
207
208 (((
209 RETURN1:01 03 02 00 02 39 85 00 00(return data)
210 )))
211
212 (((
213 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.
214
215
216 )))
217
218 (((
219 CMD2:Read voltage data with MODBUS command. address:0x00 AT+COMMAND2= 01 03 00 00 00 01,1
220 )))
221
222 (((
223 RETURN2:01 03 02 08 DC BE 1D(return data)
224 )))
225
226 (((
227 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.
228
229
230 )))
231
232 (((
233 CMD3:Read total active energy data with MODBUS command. address:0x0031 AT+COMMAND3= 01 03 00 31 00 02,1
234 )))
235
236 (((
237 RETURN3:01 03 04 00 00 00 44 FA 00(return data)
238 )))
239
240 (((
241 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.
242 )))
243
244 (((
245 Payload:01 00 02 39 85 08 DC 00 00 00 44
246 )))
247
248 [[image:image-20220527093204-13.png]]
249
250 AT COMMAND
251
252
253 (% 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.**
254
255 [[image:image-20220527093251-14.png]]
256
257 AT COMMAND
258
259
260 ==== **1.3.3.2 via LoRaWAN DOWNLINK** ====
261
262 [[image:image-20220527093358-15.png]]
263
264 (((
265 DOWNLINK
266 )))
267
268 (((
269
270 )))
271
272 (((
273 (% style="color:#4f81bd" %)**Type Code 0xAF**
274 )))
275
276 (((
277 (% class="box infomessage" %)
278 (((
279 0xAF downlink command can be used to set AT+COMMANDx or AT+DATACUTx.
280 )))
281 )))
282
283 (((
284 Note: if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.
285 )))
286
287 (((
288 Format: AF MM NN LL XX XX XX XX YY
289 )))
290
291 (((
292 Where:
293 )))
294
295 (((
296 MM: the ATCOMMAND or AT+DATACUT to be set. Value from 01 ~~ 0F,
297 )))
298
299 (((
300 NN: 0: no CRC; 1: add CRC-16/MODBUS ; 2: set the AT+DATACUT value.
301 )))
302
303 (((
304 LL: The length of AT+COMMAND or AT+DATACUT command
305 )))
306
307 (((
308 XX XX XX XX: AT+COMMAND or AT+DATACUT command
309 )))
310
311 (((
312 YY: If YY=0, RS485-LN will execute the downlink command without uplink; if YY=1, RS485-LN
313 )))
314
315 (((
316 will execute an uplink after got this command.
317 )))
318
319 (((
320 (% style="color:#4f81bd" %)**Example:**
321 )))
322
323 (((
324 **AF 03 01 06 0A 05 00 04 00 01 00**: Same as AT+COMMAND3=0A 05 00 04 00 01,1
325 )))
326
327 [[image:image-20220527093430-16.png]]
328
329 DOWNLINK
330
331
332 [[image:image-20220527093508-17.png]]
333
334 DOWNLINK
335
336
337 [[image:image-20220527093530-18.png]]
338
339 DOWNLINK
340
341
342 [[image:image-20220527093607-19.png]]
343
344 DOWNLINK
345
346
347 [[image:image-20220527093628-20.png]]
348
349 DOWNLINK
350
351
352 === **1.3.4 How to configure and output commands for RS485 to USB** ===
353
354 (((
355 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.
356 )))
357
358 (((
359 First, connect the A+ and A- of the USB to the 485 A and 485 B of the energy meter.
360 )))
361
362 (((
363 Open the serial port debugging, set the send and receive to HEX.
364 )))
365
366 (((
367 Baud rate: 9600
368 )))
369
370 (((
371 check digit: Even
372 )))
373
374 [[image:image-20220527093708-21.png]]
375
376 USB
377
378
379 [[image:image-20220527093747-22.png]]
380
381 USB
382
383
384 (((
385 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.
386 )))
387
388 (((
389 (% style="color:#4f81bd" %)**Example:**  (%%)input：01 03 00 31 00 02 95 c4
390 )))
391
392 (((
393 output：01 03 04 00 00 00 42 7A 02
394 )))
395
396 [[image:image-20220527093821-23.png]]
397
398 USB
399
400
401 === **1.3.5 How to configure multiple devices and modify device addresses** ===
402
403 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.
404
405 (((
406 (((
407 Set the device address according to the parameters in the appendix of the MODBUS communication protocol.
408 )))
409 )))
410
411 [[image:image-20220527093849-24.png]]
412
413
414 **Example**:These two meters are examples of setting parameters and device addresses.
415
416 [[image:image-20220527093950-25.png]]
417
418 [[image:image-20220527094028-26.png]]
419
420 (((
421 (((
422 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.
423 )))
424 )))
425
426 (((
427 (((
428 We can use AT+CFGDEV to set the device address.
429 )))
430 )))
431
432 (((
433 (((
434 We modify the device address 01 of the first energy meter to 02.
435 )))
436 )))
437
438 [[image:image-20220527094100-27.png]]
439
440 (% class="box infomessage" %)
441 (((
442 **AT+CFGDEV:01 10 00 61 00 01 02 00 02,1**
443 )))
444
445 * 01:device adaress
446
447 * 10:function code
448
449 * 00 61：Register address
450
451 * 00 01：Number of Registers
452
453 * 02：Number of bytes
454
455 * 00 02：Modified device address
456
457 * 1：Check code
458
459 The device address setting of the energy meter is complete.
460
461 Another energy meter is a single active energy meter with a floating-point format.
462
463 Its default device address is 01, and the following are the parameters for configuring two energy meters.
464
465 [[image:image-20220527094150-28.png]]
466
467
468 [[image:image-20220527094224-29.png]]
469
470 **PAYLOAD:01 08 DF 43 62**
471
472 * 08 DF is the valid value of the meter with device address 02.
473 * 43 62 is the valid value of the meter with device address 01.
474
475
476 == 1.4 Example 4: Circuit Breaker Remote Open Close ==
477
478 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:
479
480 [[image:image-20220527094330-30.png]]
481
482 Connection
483
484 * [[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
485
486
487 == 1.5 Example 5: SEM Three Energy Meter with RS485-BL or RS485-LN ==
488
489 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:
490
491 * [[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
492
493 * [[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
494
495 == 1.6 Example 6:CEM C31 485-T1-MID Energy Meter with RS485-LN ==
496
497 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:
498
499 * [[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
500
501 == 1.7 Example 7:Schneider Electric PLC M221 with RS485-BL ==
502
503 [[image:image-20220527094556-31.png]]
504
505 Network Structure
506
507 * [[Reference Instruction>>url:https://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Schneider%20Electric%20PLC/]]