Version 39.7 by Xiaoling on 2022/05/27 09:53
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1 (% class="wikigeneratedid" %)
2 **Contents:**
3
4 {{toc/}}
5
6 = 1. Introduction =
7
8 This article provide the examples for RS485-LN to connect to different type of RS485 sensors.
9
10
11 == 1.1 Example 1: Connect to Leak relay and VFD ==
12
13 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:
14
15 [[image:image-20220527091852-1.png]]
16
17 Connection
18
19
20
21 [[image:image-20220527091942-2.png]](% style="display:none" %)
22
23 Connection
24
25
26 Related documents:
27
28 * [[Solar Pump with Dragino>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Relay_VFD/]] : System Structure
29 * [[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.
30 * [[Video Demo>>url:https://www.youtube.com/watch?v=TAFZ5eaf-MY&t=6s&ab_channel=XavierFlorensaBerenguer]]
31
32 == 1.2 Example 2: Connect to Pulse Counter ==
33
34 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:
35
36 [[image:image-20220527092058-3.png]]
37
38 Connection
39
40
41 [[image:image-20220527092146-4.png]]
42
43 Connection
44
45 * [[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
46 * [[Dragino Solution in Farm>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/&file=Dragino%20on%20Farms.pptx]]
47
48 == ==
49
50 == 1.3 Example3: Use RS485-LN with energy meters ==
51
52 === 1.3.1 OverView ===
53
54 (((
55 **Note**：The specifications of each energy meter are different, please refer to your own energy meter specifications.
56 )))
57
58 (((
59 This example describes a single-phase meter.This is the connection between the RS485-LN and the energy meter.
60 )))
61
62 [[image:image-20220527092419-5.png]]
63
64 Connection1
65
66
67 (((
68 How to connect with Energy Meter：
69 )))
70
71 (((
72 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.
73 )))
74
75 (((
76 The RS485-LN can be powered by 7 ~~ 24V DC power source. Connection as below
77 )))
78
79 (((
80 Power Source VIN to RS485-LN VIN+
81 )))
82
83 (((
84 Power Source GND to RS485-LN VIN-
85 )))
86
87 (((
88 Once there is power, the RS485-LN will be on.
89 )))
90
91 [[image:image-20220527092514-6.png]]
92
93 Connection2
94
95
96 [[image:image-20220527092555-7.png]]
97
98 Connection3
99
100
101 === 1.3.2 How to use the parameters of the energy meter and MODBUS commands ===
102
103 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.
104
105 [[image:image-20220527092629-8.png]]
106
107
108 (% class="box infomessage" %)
109 (((
110 **Example:** AT+COMMAND1=01 03 00 00 00 01 84 0A
111 )))
112
113 * The first byte : slave address code (=001～247)
114 * The second byte : read register value function code
115 * 3rd and 4th bytes: start address of register to be read
116 * 5th and 6th bytes: Number of registers to read
117 * 7th and 8th bytes: CRC16 checksum from bytes 1 to 6.
118
119 (((
120 How to parse the reading of the return command of the parameter：
121 )))
122
123 (% class="box infomessage" %)
124 (((
125 **Example:** RETURN1：01 03 02 08 FD 7E 05
126 )))
127
128 * The first byte ARD: slave address code (=001～254)
129 * The second byte: Return to read function code
130 * 3rd byte: total number of bytes
131 * 4th～5th bytes: register data
132 * The 6th and 7th bytes: CRC16 checksum
133 * 08 FD is register data. Use short integer 16 bits to convert to decimal, get 2301, then 230.1V is the voltage.
134
135 (% class="wikigeneratedid" %)
136 (((
137
138 )))
139
140 === 1.3.3 How to configure RS485-LN and parse output commands ===
141
142 RS485-LN provides two configuration methods: AT COMMAND and DOWNLINK.
143
144
145 ==== 1.3.3.1 via AT COMMAND: ====
146
147 First, we can use **AT+CFGDEV** to get the return value, and we can also judge whether the input parameters are correct.
148
149 (((
150 If the configured parameters and commands are incorrect, the return value is not obtained.
151 )))
152
153 [[image:image-20220527092748-9.png]]
154
155 AT COMMAND
156
157
158 (% class="box infomessage" %)
159 (((
160 AT+DATACUTx : This command defines how to handle the return from AT+COMMANDx, max reture length is 40 bytes. AT+DATACUTx=a,b,c
161 )))
162
163 a: length for the return of AT+COMMAND
164
165 b:1: grab valid value by byte, max 6 bytes. 2: grab valid value by bytes section, max 3 sections.
166
167 c: define the position for valid value.
168
169 [[image:image-20220527092936-10.png]]
170
171 AT COMMAND
172
173
174 PAYLOAD is available after the valid value is intercepted.
175
176
177 [[image:image-20220527093059-11.png]]
178
179 AT COMMAND
180
181
182 You can get configured PAYLOAD on TTN.
183
184 [[image:image-20220527093133-12.png]]
185
186 (((
187 AT COMMAND
188 )))
189
190 (((
191
192 )))
193
194 (((
195 (% style="color:#4f81bd" %)**Example**:
196
197 CMD1:Read current data with MODBUS command. address:0x03 AT+COMMAND1= 01 03 00 03 00 01,1
198 )))
199
200 (((
201 RETURN1:01 03 02 00 02 39 85 00 00(return data)
202 )))
203
204 (((
205 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.
206
207
208 )))
209
210 (((
211 CMD2:Read voltage data with MODBUS command. address:0x00 AT+COMMAND2= 01 03 00 00 00 01,1
212 )))
213
214 (((
215 RETURN2:01 03 02 08 DC BE 1D(return data)
216 )))
217
218 (((
219 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.
220
221
222 )))
223
224 (((
225 CMD3:Read total active energy data with MODBUS command. address:0x0031 AT+COMMAND3= 01 03 00 31 00 02,1
226 )))
227
228 (((
229 RETURN3:01 03 04 00 00 00 44 FA 00(return data)
230 )))
231
232 (((
233 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.
234 )))
235
236 (((
237 Payload:01 00 02 39 85 08 DC 00 00 00 44
238 )))
239
240 [[image:image-20220527093204-13.png]]
241
242 AT COMMAND
243
244
245 (% 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.**
246
247 [[image:image-20220527093251-14.png]]
248
249 AT COMMAND
250
251
252 ==== 1.3.3.2 via LoRaWAN DOWNLINK ====
253
254 [[image:image-20220527093358-15.png]]
255
256 (((
257 DOWNLINK
258 )))
259
260 (((
261
262 )))
263
264 (((
265 (% style="color:#4f81bd" %)**Type Code 0xAF**
266 )))
267
268 (((
269 (% class="box infomessage" %)
270 (((
271 0xAF downlink command can be used to set AT+COMMANDx or AT+DATACUTx.
272 )))
273 )))
274
275 (((
276 Note: if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.
277 )))
278
279 (((
280 Format: AF MM NN LL XX XX XX XX YY
281 )))
282
283 (((
284 Where:
285 )))
286
287 (((
288 MM: the ATCOMMAND or AT+DATACUT to be set. Value from 01 ~~ 0F,
289 )))
290
291 (((
292 NN: 0: no CRC; 1: add CRC-16/MODBUS ; 2: set the AT+DATACUT value.
293 )))
294
295 (((
296 LL: The length of AT+COMMAND or AT+DATACUT command
297 )))
298
299 (((
300 XX XX XX XX: AT+COMMAND or AT+DATACUT command
301 )))
302
303 (((
304 YY: If YY=0, RS485-LN will execute the downlink command without uplink; if YY=1, RS485-LN
305 )))
306
307 (((
308 will execute an uplink after got this command.
309 )))
310
311 (((
312 (% style="color:#4f81bd" %)**Example:**
313 )))
314
315 (((
316 **AF 03 01 06 0A 05 00 04 00 01 00**: Same as AT+COMMAND3=0A 05 00 04 00 01,1
317 )))
318
319 [[image:image-20220527093430-16.png]]
320
321 DOWNLINK
322
323
324 [[image:image-20220527093508-17.png]]
325
326 DOWNLINK
327
328
329 [[image:image-20220527093530-18.png]]
330
331 DOWNLINK
332
333
334 [[image:image-20220527093607-19.png]]
335
336 DOWNLINK
337
338
339 [[image:image-20220527093628-20.png]]
340
341 DOWNLINK
342
343
344 === 1.3.4 How to configure and output commands for RS485 to USB ===
345
346 (((
347 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.
348 )))
349
350 (((
351 First, connect the A+ and A- of the USB to the 485 A and 485 B of the energy meter.
352 )))
353
354 (((
355 Open the serial port debugging, set the send and receive to HEX.
356 )))
357
358 (((
359 Baud rate: 9600
360 )))
361
362 (((
363 check digit: Even
364 )))
365
366 [[image:image-20220527093708-21.png]]
367
368 USB
369
370
371 [[image:image-20220527093747-22.png]]
372
373 USB
374
375
376 (((
377 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.
378 )))
379
380 (((
381 (% style="color:#4f81bd" %)**Example:**  (%%)input：01 03 00 31 00 02 95 c4
382 )))
383
384 (((
385 output：01 03 04 00 00 00 42 7A 02
386 )))
387
388 [[image:image-20220527093821-23.png]]
389
390 USB
391
392
393 === 1.3.5 How to configure multiple devices and modify device addresses ===
394
395 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.
396
397 (((
398 (((
399 Set the device address according to the parameters in the appendix of the MODBUS communication protocol.
400 )))
401 )))
402
403 [[image:image-20220527093849-24.png]]
404
405
406 **Example**:These two meters are examples of setting parameters and device addresses.
407
408 [[image:image-20220527093950-25.png]]
409
410 [[image:image-20220527094028-26.png]]
411
412 (((
413 (((
414 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.
415 )))
416 )))
417
418 (((
419 (((
420 We can use AT+CFGDEV to set the device address.
421 )))
422 )))
423
424 (((
425 (((
426 We modify the device address 01 of the first energy meter to 02.
427 )))
428 )))
429
430 [[image:image-20220527094100-27.png]]
431
432 (% class="box infomessage" %)
433 (((
434 **AT+CFGDEV:01 10 00 61 00 01 02 00 02,1**
435 )))
436
437 * 01:device adaress
438
439 * 10:function code
440
441 * 00 61：Register address
442
443 * 00 01：Number of Registers
444
445 * 02：Number of bytes
446
447 * 00 02：Modified device address
448
449 * 1：Check code
450
451 The device address setting of the energy meter is complete.
452
453 Another energy meter is a single active energy meter with a floating-point format.
454
455 Its default device address is 01, and the following are the parameters for configuring two energy meters.
456
457 [[image:image-20220527094150-28.png]]
458
459
460 [[image:image-20220527094224-29.png]]
461
462 **PAYLOAD:01 08 DF 43 62**
463
464 * 08 DF is the valid value of the meter with device address 02.
465 * 43 62 is the valid value of the meter with device address 01.
466
467
468 == 1.4 Example 4: Circuit Breaker Remote Open Close ==
469
470 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:
471
472 [[image:image-20220527094330-30.png]]
473
474 Connection
475
476 * [[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
477
478
479 == 1.5 Example 5: SEM Three Energy Meter with RS485-BL or RS485-LN ==
480
481 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:
482
483 * [[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
484
485 * [[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
486
487
488 == 1.6 Example 6:CEM C31 485-T1-MID Energy Meter with RS485-LN ==
489
490 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:
491
492 * [[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
493
494
495 == 1.7 Example 7:Schneider Electric PLC M221 with RS485-BL ==
496
497 [[image:image-20220527094556-31.png]]
498
499 Network Structure
500
501 * [[Reference Instruction>>url:https://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Schneider%20Electric%20PLC/]]

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