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Version 1.18 by Xiaoling on 2022/05/12 10:26
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1 = 1. Introduction =
2
3 This article provide the examples for RS485-LN to connect to different type of RS485 sensors.
4
5 == 1.1 Example 1: Connect to Leak relay and VFD ==
6
7 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:
8
9 [[image:https://wiki.dragino.com/images/thumb/5/5c/RS485_01.png/600px-RS485_01.png||height="297" width="534"]]
10
11 Connection
12
13
14 [[image:https://wiki.dragino.com/images/thumb/f/f2/RS485_02.png/600px-RS485_02.png||height="743" width="528"]](% style="display:none" %)
15
16 Connection
17
18 Related documents:
19
20 * [[Solar Pump with Dragino>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Relay_VFD/]] : System Structure
21 * [[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.
22 * [[Video Demo>>url:https://www.youtube.com/watch?v=TAFZ5eaf-MY&t=6s&ab_channel=XavierFlorensaBerenguer]]
23
24 == 1.2 Example 2: Connect to Pulse Counter ==
25
26 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:
27
28 [[image:https://wiki.dragino.com/images/thumb/3/34/RS485_02_1.png/600px-RS485_02_1.png||height="364" width="600"]]
29
30 Connection
31
32
33 [[image:https://wiki.dragino.com/images/thumb/5/5f/RS485_02_2.png/600px-RS485_02_2.png||height="337" width="600"]]
34
35 Connection
36
37 * [[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
38 * [[Dragino Solution in Farm>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/&file=Dragino%20on%20Farms.pptx]]
39
40 == 1.3 Example3: Use RS485-LN with energy meters ==
41
42 === 1.3.1 OverView ===
43
44 (((
45 **Note**：The specifications of each energy meter are different, please refer to your own energy meter specifications.
46 )))
47
48 (((
49 This example describes a single-phase meter.This is the connection between the RS485-LN and the energy meter.
50 )))
51
52 [[image:https://wiki.dragino.com/images/thumb/f/f4/Meter1.jpg/600px-Meter1.jpg||height="726" width="545"]]
53
54 Connection1
55
56 How to connect with Energy Meter：
57
58 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.
59
60 The RS485-LN can be powered by 7 ~~ 24V DC power source. Connection as below
61
62 Power Source VIN to RS485-LN VIN+
63
64 Power Source GND to RS485-LN VIN-
65
66 Once there is power, the RS485-LN will be on.
67
68 [[image:https://wiki.dragino.com/images/thumb/1/15/Meter2.jpg/600px-Meter2.jpg||height="433" width="577"]]
69
70 Connection2
71
72
73 [[image:https://wiki.dragino.com/images/thumb/a/a5/Meter3.jpg/600px-Meter3.jpg||height="712" width="534"]]
74
75 Connection3
76
77
78 === 1.3.2 How to use the parameters of the energy meter and MODBUS commands ===
79
80 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.
81
82 [[image:https://wiki.dragino.com/images/thumb/3/35/Meter4.png/600px-Meter4.png||alt="Meter4.png" height="193" width="600"]]
83
84 (% class="box infomessage" %)
85 (((
86 Example:AT+COMMAND1=01 03 00 00 00 01 84 0A
87 )))
88
89 * The first byte : slave address code (=001～247)
90 * The second byte : read register value function code
91 * 3rd and 4th bytes: start address of register to be read
92 * 5th and 6th bytes: Number of registers to read
93 * 7th and 8th bytes: CRC16 checksum from bytes 1 to 6.
94
95 (((
96 How to parse the reading of the return command of the parameter：
97 )))
98
99 (% class="box infomessage" %)
100 (((
101 Example:RETURN1：01 03 02 08 FD 7E 05
102 )))
103
104 * The first byte ARD: slave address code (=001～254)
105 * The second byte: Return to read function code
106 * 3rd byte: total number of bytes
107 * 4th～5th bytes: register data
108 * The 6th and 7th bytes: CRC16 checksum
109 * 08 FD is register data. Use short integer 16 bits to convert to decimal, get 2301, then 230.1V is the voltage.
110
111 === 1.3.3 How to configure RS485-LN and parse output commands ===
112
113 RS485-LN provides two configuration methods: AT COMMAND and DOWNLINK.
114
115 ==== 1.3.3.1 via AT COMMAND: ====
116
117 First, we can use **AT+CFGDEV** to get the return value, and we can also judge whether the input parameters are correct.
118
119 (((
120 If the configured parameters and commands are incorrect, the return value is not obtained.
121 )))
122
123 [[image:https://wiki.dragino.com/images/b/bc/AT_COMMAND1.png||height="358" width="456"]]
124
125 AT COMMAND
126
127 (% class="box infomessage" %)
128 (((
129 AT+DATACUTx : This command defines how to handle the return from AT+COMMANDx, max reture length is 40 bytes. AT+DATACUTx=a,b,c
130 )))
131
132 a: length for the return of AT+COMMAND
133
134 b:1: grab valid value by byte, max 6 bytes. 2: grab valid value by bytes section, max 3 sections.
135
136 c: define the position for valid value.
137
138 [[image:https://wiki.dragino.com/images/7/7d/AT_COMMAND2.png||height="278" width="477"]]
139
140 AT COMMAND
141
142 PAYLOAD is available after the valid value is intercepted.
143
144
145 [[image:https://wiki.dragino.com/images/3/3a/AT_COMMAND4.png||height="219" width="576"]]
146
147 AT COMMAND
148
149 You can get configured PAYLOAD on TTN.
150
151
152 [[image:https://wiki.dragino.com/images/thumb/c/c2/AT_COMMAND3.png/600px-AT_COMMAND3.png||height="138" width="600"]]
153
154 (((
155 AT COMMAND
156 )))
157
158 (((
159
160 )))
161
162 (((
163 **Example**: CMD1:Read current data with MODBUS command. address:0x03 AT+COMMAND1= 01 03 00 03 00 01,1
164 )))
165
166 (((
167 RETURN1:01 03 02 00 02 39 85 00 00(return data)
168 )))
169
170 (((
171 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.
172 )))
173
174 (((
175 CMD2:Read voltage data with MODBUS command. address:0x00 AT+COMMAND2= 01 03 00 00 00 01,1
176 )))
177
178 (((
179 RETURN2:01 03 02 08 DC BE 1D(return data)
180 )))
181
182 (((
183 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.
184 )))
185
186 (((
187 CMD3:Read total active energy data with MODBUS command. address:0x0031 AT+COMMAND3= 01 03 00 31 00 02,1
188 )))
189
190 (((
191 RETURN3:01 03 04 00 00 00 44 FA 00(return data)
192 )))
193
194 (((
195 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.
196 )))
197
198 (((
199 Payload:01 00 02 39 85 08 DC 00 00 00 44
200 )))
201
202 [[image:https://wiki.dragino.com/images/thumb/9/9b/AT_COMMAND10.png/600px-AT_COMMAND10.png||height="278" width="600"]]
203
204 AT COMMAND
205
206 01 is device address,00 02 is the current, 08 DC is the voltage,00 00 00 44 is the total active energy.
207
208
209 [[~[~[image:https://wiki.dragino.com/images/thumb/b/b8/AT_COMMAND11.png/600px-AT_COMMAND11.png~|~|height="271" width="600"~]~]>>url:https://wiki.dragino.com/index.php/File:AT_COMMAND11.png]]
210
211 AT COMMAND
212
213
214 ==== 1.3.3.2 via LoRaWAN DOWNLINK ====
215
216 [[image:https://wiki.dragino.com/images/thumb/f/fc/DOWNLINK_METER1.png/600px-DOWNLINK_METER1.png||height="423" width="600"]]
217
218 (((
219 DOWNLINK
220 )))
221
222 (((
223
224 )))
225
226 (((
227 Type Code 0xAF
228 )))
229
230 (((
231 0xAF downlink command can be used to set AT+COMMANDx or AT+DATACUTx.
232 )))
233
234 (((
235 Note: if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.
236 )))
237
238 (((
239 Format: AF MM NN LL XX XX XX XX YY
240 )))
241
242 (((
243 Where:
244 )))
245
246 (((
247 MM: the ATCOMMAND or AT+DATACUT to be set. Value from 01 ~~ 0F,
248 )))
249
250 (((
251 NN: 0: no CRC; 1: add CRC-16/MODBUS ; 2: set the AT+DATACUT value.
252 )))
253
254 (((
255 LL: The length of AT+COMMAND or AT+DATACUT command
256 )))
257
258 (((
259 XX XX XX XX: AT+COMMAND or AT+DATACUT command
260 )))
261
262 (((
263 YY: If YY=0, RS485-LN will execute the downlink command without uplink; if YY=1, RS485-LN
264 )))
265
266 (((
267 will execute an uplink after got this command.
268 )))
269
270 (((
271 Example:
272 )))
273
274 (((
275 AF 03 01 06 0A 05 00 04 00 01 00: Same as AT+COMMAND3=0A 05 00 04 00 01,1
276 )))
277
278 [[image:https://wiki.dragino.com/images/thumb/4/45/DOWNLINK_METER2.png/600px-DOWNLINK_METER2.png||height="208" width="600"]]
279
280 DOWNLINK
281
282
283 [[~[~[image:https://wiki.dragino.com/images/thumb/2/20/DOWNLINK_METER3.png/600px-DOWNLINK_METER3.png~|~|height="105" width="600"~]~]>>url:https://wiki.dragino.com/index.php/File:DOWNLINK_METER3.png]]
284
285 DOWNLINK
286
287
288 [[image:https://wiki.dragino.com/images/thumb/2/27/DOWNLINK_METER4.png/600px-DOWNLINK_METER4.png||height="210" width="600"]]
289
290 DOWNLINK
291
292
293 [[~[~[image:https://wiki.dragino.com/images/thumb/3/39/DOWNLINK_METER5.png/600px-DOWNLINK_METER5.png~|~|height="176" width="600"~]~]>>url:https://wiki.dragino.com/index.php/File:DOWNLINK_METER5.png]]
294
295 DOWNLINK
296
297
298 [[image:https://wiki.dragino.com/images/thumb/a/a2/DOWNLINK_METER6.png/600px-DOWNLINK_METER6.png||height="365" width="600"]]
299
300 DOWNLINK
301
302
303 === 1.3.4 How to configure and output commands for RS485 to USB ===
304
305 (((
306 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.
307 )))
308
309 (((
310 First, connect the A+ and A- of the USB to the 485 A and 485 B of the energy meter.
311 )))
312
313 (((
314 Open the serial port debugging, set the send and receive to HEX.
315 )))
316
317 (((
318 Baud rate: 9600
319 )))
320
321 (((
322 check digit: Even
323 )))
324
325 [[image:https://wiki.dragino.com/images/thumb/8/8f/Usb_meter2.jpg/600px-Usb_meter2.jpg||height="725" width="544"]]
326
327 USB
328
329
330 [[image:https://wiki.dragino.com/images/thumb/6/62/Usb_meter1.jpg/600px-Usb_meter1.jpg||height="728" width="546"]]
331
332 USB
333
334
335 (((
336 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.
337 )))
338
339 (((
340 **Example:**  input：01 03 00 31 00 02 95 c4
341 )))
342
343 (((
344 output:01 03 04 00 00 00 42 7A 02
345 )))
346
347 [[image:https://wiki.dragino.com/images/thumb/b/b3/Usb_meter3.jpg/600px-Usb_meter3.jpg||height="466" width="600"]]
348
349 USB
350
351 === 1.3.5 How to configure multiple devices and modify device addresses ===
352
353 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.
354
355 (((
356 (((
357 Set the device address according to the parameters in the appendix of the MODBUS communication protocol.
358 )))
359 )))
360
361 [[image:https://wiki.dragino.com/images/thumb/1/1f/Double_meter3.png/600px-Double_meter3.png||alt="Double meter3.png" height="83" width="600"]]
362
363 **Example**:These two meters are examples of setting parameters and device addresses.
364
365 [[image:https://wiki.dragino.com/images/thumb/e/ee/Double_meter1.jpg/600px-Double_meter1.jpg||alt="Double meter1.jpg" height="737" width="553"]]
366
367 [[image:https://wiki.dragino.com/images/thumb/7/72/Double_meter2.jpg/600px-Double_meter2.jpg||alt="Double meter2.jpg" height="733" width="550"]]
368
369 (((
370 (((
371 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.
372 )))
373 )))
374
375 (((
376 (((
377 We can use AT+CFGDEV to set the device address.
378 )))
379 )))
380
381 (((
382 (((
383 We modify the device address 01 of the first energy meter to 02.
384 )))
385 )))
386
387 [[image:https://wiki.dragino.com/images/6/6b/Double_meter4.png||alt="Double meter4.png" height="141" width="456"]]
388
389 AT+CFGDEV:01 10 00 61 00 01 02 00 02,1
390
391 * 01:device adaress
392
393 * 10:function code
394
395 * 00 61：Register address
396
397 * 00 01：Number of Registers
398
399 * 02：Number of bytes
400
401 * 00 02：Modified device address
402
403 * 1：Check code
404
405 The device address setting of the energy meter is complete.
406
407 Another energy meter is a single active energy meter with a floating-point format.
408
409 Its default device address is 01, and the following are the parameters for configuring two energy meters.
410
411 [[image:https://wiki.dragino.com/images/1/13/Meter11.png||alt="Meter11.png" height="576" width="379"]]
412
413 [[image:https://wiki.dragino.com/images/thumb/7/7e/Meter12.png/600px-Meter12.png||alt="Meter12.png" height="262" width="600"]]
414
415 PAYLOAD:01 08 DF 43 62
416
417 * 08 DF is the valid value of the meter with device address 02.
418 * 43 62 is the valid value of the meter with device address 01.
419
420 == 1.4 Example 4: Circuit Breaker Remote Open Close ==
421
422 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:
423
424 [[image:https://wiki.dragino.com/images/thumb/f/fa/RS485_04_2.png/600px-RS485_04_2.png||height="336" width="600"]]
425
426 Connection
427
428 * [[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
429
430 == 1.5 Example 5: SEM Three Energy Meter with RS485-BL or RS485-LN ==
431
432 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:
433
434 * [[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
435
436 * [[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
437
438 == 1.6 Example 6:CEM C31 485-T1-MID Energy Meter with RS485-LN ==
439
440 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:
441
442 * [[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
443
444 == 1.7 Example 7:Schneider Electric PLC M221 with RS485-BL ==
445
446 [[image:https://wiki.dragino.com/images/thumb/9/97/PLC_M221.png/600px-PLC_M221.png||height="353" width="600"]]
447
448 Network Structure
449
450 * [[Reference Instruction>>url:https://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Schneider%20Electric%20PLC/]]