Version 41.9 by Xiaoling on 2022/05/31 09:39
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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 == **1.2 Example 2: Connect to Pulse Counter** ==
39
40 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:
41
42 [[image:image-20220527092058-3.png]]
43
44 Connection
45
46
47 [[image:image-20220527092146-4.png]]
48
49 Connection
50
51 * [[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
52 * [[Dragino Solution in Farm>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/&file=Dragino%20on%20Farms.pptx]]
53
54 == ==
55
56 == **1.3 Example3: Use RS485-LN with energy meters** ==
57
58 === **1.3.1 OverView** ===
59
60 (((
61 **Note**：The specifications of each energy meter are different, please refer to your own energy meter specifications.
62 )))
63
64 (((
65 This example describes a single-phase meter.This is the connection between the RS485-LN and the energy meter.
66 )))
67
68 [[image:image-20220527092419-5.png]]
69
70 Connection1
71
72
73 (((
74 How to connect with Energy Meter：
75 )))
76
77 (((
78 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.
79 )))
80
81 (((
82 The RS485-LN can be powered by 7 ~~ 24V DC power source. Connection as below
83 )))
84
85 (((
86 Power Source VIN to RS485-LN VIN+
87 )))
88
89 (((
90 Power Source GND to RS485-LN VIN-
91 )))
92
93 (((
94 Once there is power, the RS485-LN will be on.
95 )))
96
97 [[image:image-20220527092514-6.png]]
98
99 Connection2
100
101
102 [[image:image-20220527092555-7.png]]
103
104 Connection3
105
106
107 === **1.3.2 How to use the parameters of the energy meter and MODBUS commands** ===
108
109 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.
110
111 [[image:image-20220527092629-8.png]]
112
113
114 (% class="box infomessage" %)
115 (((
116 **Example:** AT+COMMAND1=01 03 00 00 00 01 84 0A
117 )))
118
119 * The first byte : slave address code (=001～247)
120 * The second byte : read register value function code
121 * 3rd and 4th bytes: start address of register to be read
122 * 5th and 6th bytes: Number of registers to read
123 * 7th and 8th bytes: CRC16 checksum from bytes 1 to 6.
124
125 (((
126 How to parse the reading of the return command of the parameter：
127 )))
128
129 (% class="box infomessage" %)
130 (((
131 **Example:** RETURN1：01 03 02 08 FD 7E 05
132 )))
133
134 * The first byte ARD: slave address code (=001～254)
135 * The second byte: Return to read function code
136 * 3rd byte: total number of bytes
137 * 4th～5th bytes: register data
138 * The 6th and 7th bytes: CRC16 checksum
139 * 08 FD is register data. Use short integer 16 bits to convert to decimal, get 2301, then 230.1V is the voltage.
140
141 (% class="wikigeneratedid" %)
142 (((
143
144 )))
145
146 === **1.3.3 How to configure RS485-LN and parse output commands** ===
147
148 RS485-LN provides two configuration methods: AT COMMAND and DOWNLINK.
149
150
151 ==== **1.3.3.1 via AT COMMAND:** ====
152
153 First, we can use **AT+CFGDEV** to get the return value, and we can also judge whether the input parameters are correct.
154
155 (((
156 If the configured parameters and commands are incorrect, the return value is not obtained.
157 )))
158
159 [[image:image-20220527092748-9.png]]
160
161 AT COMMAND
162
163
164 (% class="box infomessage" %)
165 (((
166 AT+DATACUTx : This command defines how to handle the return from AT+COMMANDx, max reture length is 40 bytes. AT+DATACUTx=a,b,c
167 )))
168
169 a: length for the return of AT+COMMAND
170
171 b:1: grab valid value by byte, max 6 bytes. 2: grab valid value by bytes section, max 3 sections.
172
173 c: define the position for valid value.
174
175 [[image:image-20220527092936-10.png]]
176
177 AT COMMAND
178
179
180 PAYLOAD is available after the valid value is intercepted.
181
182
183 [[image:image-20220527093059-11.png]]
184
185 AT COMMAND
186
187
188 You can get configured PAYLOAD on TTN.
189
190 [[image:image-20220527093133-12.png]]
191
192 (((
193 AT COMMAND
194 )))
195
196 (((
197
198 )))
199
200 (((
201 (% style="color:#4f81bd" %)**Example**:
202
203 CMD1:Read current data with MODBUS command. address:0x03 AT+COMMAND1= 01 03 00 03 00 01,1
204 )))
205
206 (((
207 RETURN1:01 03 02 00 02 39 85 00 00(return data)
208 )))
209
210 (((
211 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.
212
213
214 )))
215
216 (((
217 CMD2:Read voltage data with MODBUS command. address:0x00 AT+COMMAND2= 01 03 00 00 00 01,1
218 )))
219
220 (((
221 RETURN2:01 03 02 08 DC BE 1D(return data)
222 )))
223
224 (((
225 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.
226
227
228 )))
229
230 (((
231 CMD3:Read total active energy data with MODBUS command. address:0x0031 AT+COMMAND3= 01 03 00 31 00 02,1
232 )))
233
234 (((
235 RETURN3:01 03 04 00 00 00 44 FA 00(return data)
236 )))
237
238 (((
239 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.
240 )))
241
242 (((
243 Payload:01 00 02 39 85 08 DC 00 00 00 44
244 )))
245
246 [[image:image-20220527093204-13.png]]
247
248 AT COMMAND
249
250
251 (% 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.**
252
253 [[image:image-20220527093251-14.png]]
254
255 AT COMMAND
256
257
258 ==== **1.3.3.2 via LoRaWAN DOWNLINK** ====
259
260 [[image:image-20220527093358-15.png]]
261
262 (((
263 DOWNLINK
264 )))
265
266 (((
267
268 )))
269
270 (((
271 (% style="color:#4f81bd" %)**Type Code 0xAF**
272 )))
273
274 (((
275 (% class="box infomessage" %)
276 (((
277 0xAF downlink command can be used to set AT+COMMANDx or AT+DATACUTx.
278 )))
279 )))
280
281 (((
282 Note: if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.
283 )))
284
285 (((
286 Format: AF MM NN LL XX XX XX XX YY
287 )))
288
289 (((
290 Where:
291 )))
292
293 (((
294 MM: the ATCOMMAND or AT+DATACUT to be set. Value from 01 ~~ 0F,
295 )))
296
297 (((
298 NN: 0: no CRC; 1: add CRC-16/MODBUS ; 2: set the AT+DATACUT value.
299 )))
300
301 (((
302 LL: The length of AT+COMMAND or AT+DATACUT command
303 )))
304
305 (((
306 XX XX XX XX: AT+COMMAND or AT+DATACUT command
307 )))
308
309 (((
310 YY: If YY=0, RS485-LN will execute the downlink command without uplink; if YY=1, RS485-LN
311 )))
312
313 (((
314 will execute an uplink after got this command.
315 )))
316
317 (((
318 (% style="color:#4f81bd" %)**Example:**
319 )))
320
321 (((
322 **AF 03 01 06 0A 05 00 04 00 01 00**: Same as AT+COMMAND3=0A 05 00 04 00 01,1
323 )))
324
325 [[image:image-20220527093430-16.png]]
326
327 DOWNLINK
328
329
330 [[image:image-20220527093508-17.png]]
331
332 DOWNLINK
333
334
335 [[image:image-20220527093530-18.png]]
336
337 DOWNLINK
338
339
340 [[image:image-20220527093607-19.png]]
341
342 DOWNLINK
343
344
345 [[image:image-20220527093628-20.png]]
346
347 DOWNLINK
348
349
350 === **1.3.4 How to configure and output commands for RS485 to USB** ===
351
352 (((
353 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.
354 )))
355
356 (((
357 First, connect the A+ and A- of the USB to the 485 A and 485 B of the energy meter.
358 )))
359
360 (((
361 Open the serial port debugging, set the send and receive to HEX.
362 )))
363
364 (((
365 Baud rate: 9600
366 )))
367
368 (((
369 check digit: Even
370 )))
371
372 [[image:image-20220527093708-21.png]]
373
374 USB
375
376
377 [[image:image-20220527093747-22.png]]
378
379 USB
380
381
382 (((
383 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.
384 )))
385
386 (((
387 (% style="color:#4f81bd" %)**Example:**  (%%)input：01 03 00 31 00 02 95 c4
388 )))
389
390 (((
391 output：01 03 04 00 00 00 42 7A 02
392 )))
393
394 [[image:image-20220527093821-23.png]]
395
396 USB
397
398
399 === **1.3.5 How to configure multiple devices and modify device addresses** ===
400
401 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.
402
403 (((
404 (((
405 Set the device address according to the parameters in the appendix of the MODBUS communication protocol.
406 )))
407 )))
408
409 [[image:image-20220527093849-24.png]]
410
411
412 **Example**:These two meters are examples of setting parameters and device addresses.
413
414 [[image:image-20220527093950-25.png]]
415
416 [[image:image-20220527094028-26.png]]
417
418 (((
419 (((
420 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.
421 )))
422 )))
423
424 (((
425 (((
426 We can use AT+CFGDEV to set the device address.
427 )))
428 )))
429
430 (((
431 (((
432 We modify the device address 01 of the first energy meter to 02.
433 )))
434 )))
435
436 [[image:image-20220527094100-27.png]]
437
438 (% class="box infomessage" %)
439 (((
440 **AT+CFGDEV:01 10 00 61 00 01 02 00 02,1**
441 )))
442
443 * 01:device adaress
444
445 * 10:function code
446
447 * 00 61：Register address
448
449 * 00 01：Number of Registers
450
451 * 02：Number of bytes
452
453 * 00 02：Modified device address
454
455 * 1：Check code
456
457 The device address setting of the energy meter is complete.
458
459 Another energy meter is a single active energy meter with a floating-point format.
460
461 Its default device address is 01, and the following are the parameters for configuring two energy meters.
462
463 [[image:image-20220527094150-28.png]]
464
465
466 [[image:image-20220527094224-29.png]]
467
468 **PAYLOAD:01 08 DF 43 62**
469
470 * 08 DF is the valid value of the meter with device address 02.
471 * 43 62 is the valid value of the meter with device address 01.
472
473
474
475 == 1.4 Example 4: Circuit Breaker Remote Open Close ==
476
477 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:
478
479 [[image:image-20220527094330-30.png]]
480
481 Connection
482
483 * [[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
484
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/]]

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