Version 41.7 by Xiaoling on 2022/05/30 11:28
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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 [[image:image-20220527092146-4.png]]
49
50 Connection
51
52 * [[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
53 * [[Dragino Solution in Farm>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/&file=Dragino%20on%20Farms.pptx]]
54
55 == ==
56
57 == **1.3 Example3: Use RS485-LN with energy meters** ==
58
59 === **1.3.1 OverView** ===
60
61 (((
62 **Note**：The specifications of each energy meter are different, please refer to your own energy meter specifications.
63 )))
64
65 (((
66 This example describes a single-phase meter.This is the connection between the RS485-LN and the energy meter.
67 )))
68
69 [[image:image-20220527092419-5.png]]
70
71 Connection1
72
73
74 (((
75 How to connect with Energy Meter：
76 )))
77
78 (((
79 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.
80 )))
81
82 (((
83 The RS485-LN can be powered by 7 ~~ 24V DC power source. Connection as below
84 )))
85
86 (((
87 Power Source VIN to RS485-LN VIN+
88 )))
89
90 (((
91 Power Source GND to RS485-LN VIN-
92 )))
93
94 (((
95 Once there is power, the RS485-LN will be on.
96 )))
97
98 [[image:image-20220527092514-6.png]]
99
100 Connection2
101
102
103 [[image:image-20220527092555-7.png]]
104
105 Connection3
106
107
108 === **1.3.2 How to use the parameters of the energy meter and MODBUS commands** ===
109
110 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.
111
112 [[image:image-20220527092629-8.png]]
113
114
115 (% class="box infomessage" %)
116 (((
117 **Example:** AT+COMMAND1=01 03 00 00 00 01 84 0A
118 )))
119
120 * The first byte : slave address code (=001～247)
121 * The second byte : read register value function code
122 * 3rd and 4th bytes: start address of register to be read
123 * 5th and 6th bytes: Number of registers to read
124 * 7th and 8th bytes: CRC16 checksum from bytes 1 to 6.
125
126 (((
127 How to parse the reading of the return command of the parameter：
128 )))
129
130 (% class="box infomessage" %)
131 (((
132 **Example:** RETURN1：01 03 02 08 FD 7E 05
133 )))
134
135 * The first byte ARD: slave address code (=001～254)
136 * The second byte: Return to read function code
137 * 3rd byte: total number of bytes
138 * 4th～5th bytes: register data
139 * The 6th and 7th bytes: CRC16 checksum
140 * 08 FD is register data. Use short integer 16 bits to convert to decimal, get 2301, then 230.1V is the voltage.
141
142 (% class="wikigeneratedid" %)
143 (((
144
145 )))
146
147 === **1.3.3 How to configure RS485-LN and parse output commands** ===
148
149 RS485-LN provides two configuration methods: AT COMMAND and DOWNLINK.
150
151
152 ==== **1.3.3.1 via AT COMMAND:** ====
153
154 First, we can use **AT+CFGDEV** to get the return value, and we can also judge whether the input parameters are correct.
155
156 (((
157 If the configured parameters and commands are incorrect, the return value is not obtained.
158 )))
159
160 [[image:image-20220527092748-9.png]]
161
162 AT COMMAND
163
164
165 (% class="box infomessage" %)
166 (((
167 AT+DATACUTx : This command defines how to handle the return from AT+COMMANDx, max reture length is 40 bytes. AT+DATACUTx=a,b,c
168 )))
169
170 a: length for the return of AT+COMMAND
171
172 b:1: grab valid value by byte, max 6 bytes. 2: grab valid value by bytes section, max 3 sections.
173
174 c: define the position for valid value.
175
176 [[image:image-20220527092936-10.png]]
177
178 AT COMMAND
179
180
181 PAYLOAD is available after the valid value is intercepted.
182
183
184 [[image:image-20220527093059-11.png]]
185
186 AT COMMAND
187
188
189 You can get configured PAYLOAD on TTN.
190
191 [[image:image-20220527093133-12.png]]
192
193 (((
194 AT COMMAND
195 )))
196
197 (((
198
199 )))
200
201 (((
202 (% style="color:#4f81bd" %)**Example**:
203
204 CMD1:Read current data with MODBUS command. address:0x03 AT+COMMAND1= 01 03 00 03 00 01,1
205 )))
206
207 (((
208 RETURN1:01 03 02 00 02 39 85 00 00(return data)
209 )))
210
211 (((
212 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.
213
214
215 )))
216
217 (((
218 CMD2:Read voltage data with MODBUS command. address:0x00 AT+COMMAND2= 01 03 00 00 00 01,1
219 )))
220
221 (((
222 RETURN2:01 03 02 08 DC BE 1D(return data)
223 )))
224
225 (((
226 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.
227
228
229 )))
230
231 (((
232 CMD3:Read total active energy data with MODBUS command. address:0x0031 AT+COMMAND3= 01 03 00 31 00 02,1
233 )))
234
235 (((
236 RETURN3:01 03 04 00 00 00 44 FA 00(return data)
237 )))
238
239 (((
240 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.
241 )))
242
243 (((
244 Payload:01 00 02 39 85 08 DC 00 00 00 44
245 )))
246
247 [[image:image-20220527093204-13.png]]
248
249 AT COMMAND
250
251
252 (% 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.**
253
254 [[image:image-20220527093251-14.png]]
255
256 AT COMMAND
257
258
259 ==== **1.3.3.2 via LoRaWAN DOWNLINK** ====
260
261 [[image:image-20220527093358-15.png]]
262
263 (((
264 DOWNLINK
265 )))
266
267 (((
268
269 )))
270
271 (((
272 (% style="color:#4f81bd" %)**Type Code 0xAF**
273 )))
274
275 (((
276 (% class="box infomessage" %)
277 (((
278 0xAF downlink command can be used to set AT+COMMANDx or AT+DATACUTx.
279 )))
280 )))
281
282 (((
283 Note: if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.
284 )))
285
286 (((
287 Format: AF MM NN LL XX XX XX XX YY
288 )))
289
290 (((
291 Where:
292 )))
293
294 (((
295 MM: the ATCOMMAND or AT+DATACUT to be set. Value from 01 ~~ 0F,
296 )))
297
298 (((
299 NN: 0: no CRC; 1: add CRC-16/MODBUS ; 2: set the AT+DATACUT value.
300 )))
301
302 (((
303 LL: The length of AT+COMMAND or AT+DATACUT command
304 )))
305
306 (((
307 XX XX XX XX: AT+COMMAND or AT+DATACUT command
308 )))
309
310 (((
311 YY: If YY=0, RS485-LN will execute the downlink command without uplink; if YY=1, RS485-LN
312 )))
313
314 (((
315 will execute an uplink after got this command.
316 )))
317
318 (((
319 (% style="color:#4f81bd" %)**Example:**
320 )))
321
322 (((
323 **AF 03 01 06 0A 05 00 04 00 01 00**: Same as AT+COMMAND3=0A 05 00 04 00 01,1
324 )))
325
326 [[image:image-20220527093430-16.png]]
327
328 DOWNLINK
329
330
331 [[image:image-20220527093508-17.png]]
332
333 DOWNLINK
334
335
336 [[image:image-20220527093530-18.png]]
337
338 DOWNLINK
339
340
341 [[image:image-20220527093607-19.png]]
342
343 DOWNLINK
344
345
346 [[image:image-20220527093628-20.png]]
347
348 DOWNLINK
349
350
351 === **1.3.4 How to configure and output commands for RS485 to USB** ===
352
353 (((
354 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.
355 )))
356
357 (((
358 First, connect the A+ and A- of the USB to the 485 A and 485 B of the energy meter.
359 )))
360
361 (((
362 Open the serial port debugging, set the send and receive to HEX.
363 )))
364
365 (((
366 Baud rate: 9600
367 )))
368
369 (((
370 check digit: Even
371 )))
372
373 [[image:image-20220527093708-21.png]]
374
375 USB
376
377
378 [[image:image-20220527093747-22.png]]
379
380 USB
381
382
383 (((
384 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.
385 )))
386
387 (((
388 (% style="color:#4f81bd" %)**Example:**  (%%)input：01 03 00 31 00 02 95 c4
389 )))
390
391 (((
392 output：01 03 04 00 00 00 42 7A 02
393 )))
394
395 [[image:image-20220527093821-23.png]]
396
397 USB
398
399
400 === **1.3.5 How to configure multiple devices and modify device addresses** ===
401
402 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.
403
404 (((
405 (((
406 Set the device address according to the parameters in the appendix of the MODBUS communication protocol.
407 )))
408 )))
409
410 [[image:image-20220527093849-24.png]]
411
412
413 **Example**:These two meters are examples of setting parameters and device addresses.
414
415 [[image:image-20220527093950-25.png]]
416
417 [[image:image-20220527094028-26.png]]
418
419 (((
420 (((
421 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.
422 )))
423 )))
424
425 (((
426 (((
427 We can use AT+CFGDEV to set the device address.
428 )))
429 )))
430
431 (((
432 (((
433 We modify the device address 01 of the first energy meter to 02.
434 )))
435 )))
436
437 [[image:image-20220527094100-27.png]]
438
439 (% class="box infomessage" %)
440 (((
441 **AT+CFGDEV:01 10 00 61 00 01 02 00 02,1**
442 )))
443
444 * 01:device adaress
445
446 * 10:function code
447
448 * 00 61：Register address
449
450 * 00 01：Number of Registers
451
452 * 02：Number of bytes
453
454 * 00 02：Modified device address
455
456 * 1：Check code
457
458 The device address setting of the energy meter is complete.
459
460 Another energy meter is a single active energy meter with a floating-point format.
461
462 Its default device address is 01, and the following are the parameters for configuring two energy meters.
463
464 [[image:image-20220527094150-28.png]]
465
466
467 [[image:image-20220527094224-29.png]]
468
469 **PAYLOAD:01 08 DF 43 62**
470
471 * 08 DF is the valid value of the meter with device address 02.
472 * 43 62 is the valid value of the meter with device address 01.
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 == 1.5 Example 5: SEM Three Energy Meter with RS485-BL or RS485-LN ==
487
488 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:
489
490 * [[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
491
492 * [[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
493
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
502 == 1.7 Example 7:Schneider Electric PLC M221 with RS485-BL ==
503
504 [[image:image-20220527094556-31.png]]
505
506 Network Structure
507
508 * [[Reference Instruction>>url:https://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Schneider%20Electric%20PLC/]]
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