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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 == 1.1 Example 1: Connect to Leak relay and VFD ==
11
12 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:
13
14 [[image:image-20220527091852-1.png]]
15
16 Connection
17
18
19
20 [[image:image-20220527091942-2.png]](% style="display:none" %)
21
22 Connection
23
24
25 Related documents:
26
27 * [[Solar Pump with Dragino>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Relay_VFD/]] : System Structure
28 * [[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.
29 * [[Video Demo>>url:https://www.youtube.com/watch?v=TAFZ5eaf-MY&t=6s&ab_channel=XavierFlorensaBerenguer]]
30
31 == 1.2 Example 2: Connect to Pulse Counter ==
32
33 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:
34
35 [[image:image-20220527092058-3.png]]
36
37 Connection
38
39
40 [[image:image-20220527092146-4.png]]
41
42 Connection
43
44 * [[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
45 * [[Dragino Solution in Farm>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/&file=Dragino%20on%20Farms.pptx]]
46
47 == ==
48
49 == 1.3 Example3: Use RS485-LN with energy meters ==
50
51 === 1.3.1 OverView ===
52
53 (((
54 **Note**:The specifications of each energy meter are different, please refer to your own energy meter specifications.
55 )))
56
57 (((
58 This example describes a single-phase meter.This is the connection between the RS485-LN and the energy meter.
59 )))
60
61 [[image:image-20220527092419-5.png]]
62
63 Connection1
64
65
66 (((
67 How to connect with Energy Meter:
68 )))
69
70 (((
71 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.
72 )))
73
74 (((
75 The RS485-LN can be powered by 7 ~~ 24V DC power source. Connection as below
76 )))
77
78 (((
79 Power Source VIN to RS485-LN VIN+
80 )))
81
82 (((
83 Power Source GND to RS485-LN VIN-
84 )))
85
86 (((
87 Once there is power, the RS485-LN will be on.
88 )))
89
90 [[image:image-20220527092514-6.png]]
91
92 Connection2
93
94
95 [[image:image-20220527092555-7.png]]
96
97 Connection3
98
99
100 === 1.3.2 How to use the parameters of the energy meter and MODBUS commands ===
101
102 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.
103
104 [[image:image-20220527092629-8.png]]
105
106
107 (% class="box infomessage" %)
108 (((
109 **Example:** AT+COMMAND1=01 03 00 00 00 01 84 0A
110 )))
111
112 * The first byte : slave address code (=001~247)
113 * The second byte : read register value function code
114 * 3rd and 4th bytes: start address of register to be read
115 * 5th and 6th bytes: Number of registers to read
116 * 7th and 8th bytes: CRC16 checksum from bytes 1 to 6.
117
118 (((
119 How to parse the reading of the return command of the parameter:
120 )))
121
122 (% class="box infomessage" %)
123 (((
124 **Example:** RETURN1:01 03 02 08 FD 7E 05
125 )))
126
127 * The first byte ARD: slave address code (=001~254)
128 * The second byte: Return to read function code
129 * 3rd byte: total number of bytes
130 * 4th~5th bytes: register data
131 * The 6th and 7th bytes: CRC16 checksum
132 * 08 FD is register data. Use short integer 16 bits to convert to decimal, get 2301, then 230.1V is the voltage.
133
134 (% class="wikigeneratedid" %)
135 (((
136
137 )))
138
139 === 1.3.3 How to configure RS485-LN and parse output commands ===
140
141 RS485-LN provides two configuration methods: AT COMMAND and DOWNLINK.
142
143
144 ==== 1.3.3.1 via AT COMMAND: ====
145
146 First, we can use **AT+CFGDEV** to get the return value, and we can also judge whether the input parameters are correct.
147
148 (((
149 If the configured parameters and commands are incorrect, the return value is not obtained.
150 )))
151
152 [[image:image-20220527092748-9.png]]
153
154 AT COMMAND
155
156
157 (% class="box infomessage" %)
158 (((
159 AT+DATACUTx : This command defines how to handle the return from AT+COMMANDx, max reture length is 40 bytes. AT+DATACUTx=a,b,c
160 )))
161
162 a: length for the return of AT+COMMAND
163
164 b:1: grab valid value by byte, max 6 bytes. 2: grab valid value by bytes section, max 3 sections.
165
166 c: define the position for valid value.
167
168 [[image:image-20220527092936-10.png]]
169
170 AT COMMAND
171
172
173 PAYLOAD is available after the valid value is intercepted.
174
175
176 [[image:image-20220527093059-11.png]]
177
178 AT COMMAND
179
180
181 You can get configured PAYLOAD on TTN.
182
183 [[image:image-20220527093133-12.png]]
184
185 (((
186 AT COMMAND
187 )))
188
189 (((
190
191 )))
192
193 (((
194 **Example**: CMD1:Read current data with MODBUS command. address:0x03 AT+COMMAND1= 01 03 00 03 00 01,1
195 )))
196
197 (((
198 RETURN1:01 03 02 00 02 39 85 00 00(return data)
199 )))
200
201 (((
202 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.
203 )))
204
205 (((
206 CMD2:Read voltage data with MODBUS command. address:0x00 AT+COMMAND2= 01 03 00 00 00 01,1
207 )))
208
209 (((
210 RETURN2:01 03 02 08 DC BE 1D(return data)
211 )))
212
213 (((
214 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.
215 )))
216
217 (((
218 CMD3:Read total active energy data with MODBUS command. address:0x0031 AT+COMMAND3= 01 03 00 31 00 02,1
219 )))
220
221 (((
222 RETURN3:01 03 04 00 00 00 44 FA 00(return data)
223 )))
224
225 (((
226 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.
227 )))
228
229 (((
230 Payload:01 00 02 39 85 08 DC 00 00 00 44
231 )))
232
233 [[image:image-20220527093204-13.png]]
234
235 AT COMMAND
236
237
238 (% 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.**
239
240 [[image:image-20220527093251-14.png]]
241
242 AT COMMAND
243
244
245 ==== 1.3.3.2 via LoRaWAN DOWNLINK ====
246
247 [[image:image-20220527093358-15.png]]
248
249 (((
250 DOWNLINK
251 )))
252
253 (((
254
255 )))
256
257 (((
258 **Type Code 0xAF**
259 )))
260
261 (((
262 (% class="box infomessage" %)
263 (((
264 0xAF downlink command can be used to set AT+COMMANDx or AT+DATACUTx.
265 )))
266 )))
267
268 (((
269 Note: if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.
270 )))
271
272 (((
273 Format: AF MM NN LL XX XX XX XX YY
274 )))
275
276 (((
277 Where:
278 )))
279
280 (((
281 MM: the ATCOMMAND or AT+DATACUT to be set. Value from 01 ~~ 0F,
282 )))
283
284 (((
285 NN: 0: no CRC; 1: add CRC-16/MODBUS ; 2: set the AT+DATACUT value.
286 )))
287
288 (((
289 LL: The length of AT+COMMAND or AT+DATACUT command
290 )))
291
292 (((
293 XX XX XX XX: AT+COMMAND or AT+DATACUT command
294 )))
295
296 (((
297 YY: If YY=0, RS485-LN will execute the downlink command without uplink; if YY=1, RS485-LN
298 )))
299
300 (((
301 will execute an uplink after got this command.
302 )))
303
304 (((
305 Example:
306 )))
307
308 (((
309 AF 03 01 06 0A 05 00 04 00 01 00: Same as AT+COMMAND3=0A 05 00 04 00 01,1
310 )))
311
312 [[image:image-20220527093430-16.png]]
313
314 DOWNLINK
315
316
317 [[image:image-20220527093508-17.png]]
318
319 DOWNLINK
320
321
322 [[image:image-20220527093530-18.png]]
323
324 DOWNLINK
325
326
327 [[image:image-20220527093607-19.png]]
328
329 DOWNLINK
330
331
332 [[image:image-20220527093628-20.png]]
333
334 DOWNLINK
335
336
337 === 1.3.4 How to configure and output commands for RS485 to USB ===
338
339 (((
340 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.
341 )))
342
343 (((
344 First, connect the A+ and A- of the USB to the 485 A and 485 B of the energy meter.
345 )))
346
347 (((
348 Open the serial port debugging, set the send and receive to HEX.
349 )))
350
351 (((
352 Baud rate: 9600
353 )))
354
355 (((
356 check digit: Even
357 )))
358
359 [[image:image-20220527093708-21.png]]
360
361 USB
362
363
364 [[image:image-20220527093747-22.png]]
365
366 USB
367
368
369 (((
370 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.
371 )))
372
373 (((
374 **Example:**  input:01 03 00 31 00 02 95 c4
375 )))
376
377 (((
378 output:01 03 04 00 00 00 42 7A 02
379 )))
380
381 [[image:image-20220527093821-23.png]]
382
383 USB
384
385
386 === 1.3.5 How to configure multiple devices and modify device addresses ===
387
388 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.
389
390 (((
391 (((
392 Set the device address according to the parameters in the appendix of the MODBUS communication protocol.
393 )))
394 )))
395
396 [[image:image-20220527093849-24.png]]
397
398
399 **Example**:These two meters are examples of setting parameters and device addresses.
400
401 [[image:https://wiki.dragino.com/images/thumb/e/ee/Double_meter1.jpg/600px-Double_meter1.jpg||alt="Double meter1.jpg" height="737" width="553"]]
402
403 [[image:https://wiki.dragino.com/images/thumb/7/72/Double_meter2.jpg/600px-Double_meter2.jpg||alt="Double meter2.jpg" height="733" width="550"]]
404
405 (((
406 (((
407 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.
408 )))
409 )))
410
411 (((
412 (((
413 We can use AT+CFGDEV to set the device address.
414 )))
415 )))
416
417 (((
418 (((
419 We modify the device address 01 of the first energy meter to 02.
420 )))
421 )))
422
423 [[image:https://wiki.dragino.com/images/6/6b/Double_meter4.png||alt="Double meter4.png" height="141" width="456"]]
424
425 AT+CFGDEV:01 10 00 61 00 01 02 00 02,1
426
427 * 01:device adaress
428
429 * 10:function code
430
431 * 00 61:Register address
432
433 * 00 01:Number of Registers
434
435 * 02:Number of bytes
436
437 * 00 02:Modified device address
438
439 * 1:Check code
440
441 The device address setting of the energy meter is complete.
442
443 Another energy meter is a single active energy meter with a floating-point format.
444
445 Its default device address is 01, and the following are the parameters for configuring two energy meters.
446
447 [[image:https://wiki.dragino.com/images/1/13/Meter11.png||alt="Meter11.png" height="576" width="379"]]
448
449 [[image:https://wiki.dragino.com/images/thumb/7/7e/Meter12.png/600px-Meter12.png||alt="Meter12.png" height="262" width="600"]]
450
451 PAYLOAD:01 08 DF 43 62
452
453 * 08 DF is the valid value of the meter with device address 02.
454 * 43 62 is the valid value of the meter with device address 01.
455
456 == 1.4 Example 4: Circuit Breaker Remote Open Close ==
457
458 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:
459
460 [[image:https://wiki.dragino.com/images/thumb/f/fa/RS485_04_2.png/600px-RS485_04_2.png||height="336" width="600"]]
461
462 Connection
463
464 * [[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
465
466 == 1.5 Example 5: SEM Three Energy Meter with RS485-BL or RS485-LN ==
467
468 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:
469
470 * [[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
471
472 * [[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
473
474 == 1.6 Example 6:CEM C31 485-T1-MID Energy Meter with RS485-LN ==
475
476 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:
477
478 * [[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
479
480 == 1.7 Example 7:Schneider Electric PLC M221 with RS485-BL ==
481
482 [[image:https://wiki.dragino.com/images/thumb/9/97/PLC_M221.png/600px-PLC_M221.png||height="353" width="600"]]
483
484 Network Structure
485
486 * [[Reference Instruction>>url:https://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Schneider%20Electric%20PLC/]]
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