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Version 1.14 by Xiaoling on 2022/05/12 10:16
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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 [[image:https://wiki.dragino.com/images/thumb/f/f2/RS485_02.png/600px-RS485_02.png||height="743" width="528"]](% style="display:none" %)
14
15 Connection
16
17 Related documents:
18
19 * [[Solar Pump with Dragino>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Relay_VFD/]] : System Structure
20 * [[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.
21 * [[Video Demo>>url:https://www.youtube.com/watch?v=TAFZ5eaf-MY&t=6s&ab_channel=XavierFlorensaBerenguer]]
22
23 == 1.2 Example 2: Connect to Pulse Counter ==
24
25 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:
26
27 [[image:https://wiki.dragino.com/images/thumb/3/34/RS485_02_1.png/600px-RS485_02_1.png||height="364" width="600"]]
28
29 Connection
30
31 [[image:https://wiki.dragino.com/images/thumb/5/5f/RS485_02_2.png/600px-RS485_02_2.png||height="337" width="600"]]
32
33 Connection
34
35 * [[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
36 * [[Dragino Solution in Farm>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/&file=Dragino%20on%20Farms.pptx]]
37
38 == 1.3 Example3: Use RS485-LN with energy meters ==
39
40 === 1.3.1 OverView ===
41
42 (((
43 **Note**：The specifications of each energy meter are different, please refer to your own energy meter specifications.
44 )))
45
46 (((
47 This example describes a single-phase meter.This is the connection between the RS485-LN and the energy meter.
48 )))
49
50 [[image:https://wiki.dragino.com/images/thumb/f/f4/Meter1.jpg/600px-Meter1.jpg||height="726" width="545"]]
51
52 Connection1
53
54 How to connect with Energy Meter：
55
56 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.
57
58 The RS485-LN can be powered by 7 ~~ 24V DC power source. Connection as below
59
60 Power Source VIN to RS485-LN VIN+
61
62 Power Source GND to RS485-LN VIN-
63
64 Once there is power, the RS485-LN will be on.
65
66 [[image:https://wiki.dragino.com/images/thumb/1/15/Meter2.jpg/600px-Meter2.jpg||height="433" width="577"]]
67
68 Connection2
69
70
71 [[image:https://wiki.dragino.com/images/thumb/a/a5/Meter3.jpg/600px-Meter3.jpg||height="763" width="573"]]
72
73 Connection3
74
75
76 === 1.3.2 How to use the parameters of the energy meter and MODBUS commands ===
77
78 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.
79
80 [[image:https://wiki.dragino.com/images/thumb/3/35/Meter4.png/600px-Meter4.png||alt="Meter4.png" height="193" width="600"]]
81
82 (% class="box infomessage" %)
83 (((
84 Example:AT+COMMAND1=01 03 00 00 00 01 84 0A
85 )))
86
87 * The first byte : slave address code (=001～247)
88 * The second byte : read register value function code
89 * 3rd and 4th bytes: start address of register to be read
90 * 5th and 6th bytes: Number of registers to read
91 * 7th and 8th bytes: CRC16 checksum from bytes 1 to 6.
92
93 (((
94 How to parse the reading of the return command of the parameter：
95 )))
96
97 (% class="box infomessage" %)
98 (((
99 Example:RETURN1：01 03 02 08 FD 7E 05
100 )))
101
102 * The first byte ARD: slave address code (=001～254)
103 * The second byte: Return to read function code
104 * 3rd byte: total number of bytes
105 * 4th～5th bytes: register data
106 * The 6th and 7th bytes: CRC16 checksum
107 * 08 FD is register data. Use short integer 16 bits to convert to decimal, get 2301, then 230.1V is the voltage.
108
109 === 1.3.3 How to configure RS485-LN and parse output commands ===
110
111 RS485-LN provides two configuration methods: AT COMMAND and DOWNLINK.
112
113 ==== 1.3.3.1 via AT COMMAND: ====
114
115 First, we can use **AT+CFGDEV** to get the return value, and we can also judge whether the input parameters are correct.
116
117 (((
118 If the configured parameters and commands are incorrect, the return value is not obtained.
119 )))
120
121 [[image:https://wiki.dragino.com/images/b/bc/AT_COMMAND1.png||height="358" width="456"]]
122
123 AT COMMAND
124
125 (% class="box infomessage" %)
126 (((
127 AT+DATACUTx : This command defines how to handle the return from AT+COMMANDx, max reture length is 40 bytes. AT+DATACUTx=a,b,c
128 )))
129
130 a: length for the return of AT+COMMAND
131
132 b:1: grab valid value by byte, max 6 bytes. 2: grab valid value by bytes section, max 3 sections.
133
134 c: define the position for valid value.
135
136 [[image:https://wiki.dragino.com/images/7/7d/AT_COMMAND2.png||height="278" width="477"]]
137
138 AT COMMAND
139
140 PAYLOAD is available after the valid value is intercepted.
141
142
143 [[image:https://wiki.dragino.com/images/3/3a/AT_COMMAND4.png||height="219" width="576"]]
144
145 AT COMMAND
146
147 You can get configured PAYLOAD on TTN.
148
149
150 [[image:https://wiki.dragino.com/images/thumb/c/c2/AT_COMMAND3.png/600px-AT_COMMAND3.png||height="138" width="600"]]
151
152 (((
153 AT COMMAND
154 )))
155
156 (((
157
158 )))
159
160 (((
161 **Example**: CMD1:Read current data with MODBUS command. address:0x03 AT+COMMAND1= 01 03 00 03 00 01,1
162 )))
163
164 (((
165 RETURN1:01 03 02 00 02 39 85 00 00(return data)
166 )))
167
168 (((
169 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.
170 )))
171
172 (((
173 CMD2:Read voltage data with MODBUS command. address:0x00 AT+COMMAND2= 01 03 00 00 00 01,1
174 )))
175
176 (((
177 RETURN2:01 03 02 08 DC BE 1D(return data)
178 )))
179
180 (((
181 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.
182 )))
183
184 (((
185 CMD3:Read total active energy data with MODBUS command. address:0x0031 AT+COMMAND3= 01 03 00 31 00 02,1
186 )))
187
188 (((
189 RETURN3:01 03 04 00 00 00 44 FA 00(return data)
190 )))
191
192 (((
193 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.
194 )))
195
196 (((
197 Payload:01 00 02 39 85 08 DC 00 00 00 44
198 )))
199
200 [[image:https://wiki.dragino.com/images/thumb/9/9b/AT_COMMAND10.png/600px-AT_COMMAND10.png||height="278" width="600"]]
201
202 AT COMMAND
203
204 01 is device address,00 02 is the current, 08 DC is the voltage,00 00 00 44 is the total active energy.
205
206
207 [[~[~[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]]
208
209 AT COMMAND
210
211
212 ==== 1.3.3.2 via LoRaWAN DOWNLINK ====
213
214 [[image:https://wiki.dragino.com/images/thumb/f/fc/DOWNLINK_METER1.png/600px-DOWNLINK_METER1.png||height="423" width="600"]]
215
216 (((
217 DOWNLINK
218 )))
219
220 (((
221
222 )))
223
224 (((
225 Type Code 0xAF
226 )))
227
228 (((
229 0xAF downlink command can be used to set AT+COMMANDx or AT+DATACUTx.
230 )))
231
232 (((
233 Note: if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.
234 )))
235
236 (((
237 Format: AF MM NN LL XX XX XX XX YY
238 )))
239
240 (((
241 Where:
242 )))
243
244 (((
245 MM: the ATCOMMAND or AT+DATACUT to be set. Value from 01 ~~ 0F,
246 )))
247
248 (((
249 NN: 0: no CRC; 1: add CRC-16/MODBUS ; 2: set the AT+DATACUT value.
250 )))
251
252 (((
253 LL: The length of AT+COMMAND or AT+DATACUT command
254 )))
255
256 (((
257 XX XX XX XX: AT+COMMAND or AT+DATACUT command
258 )))
259
260 (((
261 YY: If YY=0, RS485-LN will execute the downlink command without uplink; if YY=1, RS485-LN
262 )))
263
264 (((
265 will execute an uplink after got this command.
266 )))
267
268 (((
269 Example:
270 )))
271
272 (((
273 AF 03 01 06 0A 05 00 04 00 01 00: Same as AT+COMMAND3=0A 05 00 04 00 01,1
274 )))
275
276 [[image:https://wiki.dragino.com/images/thumb/4/45/DOWNLINK_METER2.png/600px-DOWNLINK_METER2.png||height="208" width="600"]]
277
278 DOWNLINK
279
280
281 [[~[~[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]]
282
283 DOWNLINK
284
285
286 [[image:https://wiki.dragino.com/images/thumb/2/27/DOWNLINK_METER4.png/600px-DOWNLINK_METER4.png||height="210" width="600"]]
287
288 DOWNLINK
289
290
291 [[~[~[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]]
292
293 DOWNLINK
294
295 [[image:https://wiki.dragino.com/images/thumb/a/a2/DOWNLINK_METER6.png/600px-DOWNLINK_METER6.png||height="365" width="600"]]
296
297 DOWNLINK
298
299
300 === 1.3.4 How to configure and output commands for RS485 to USB ===
301
302 (((
303 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.
304 )))
305
306 (((
307 First, connect the A+ and A- of the USB to the 485 A and 485 B of the energy meter.
308 )))
309
310 (((
311 Open the serial port debugging, set the send and receive to HEX.
312 )))
313
314 (((
315 Baud rate: 9600
316 )))
317
318 (((
319 check digit: Even
320 )))
321
322 [[image:https://wiki.dragino.com/images/thumb/8/8f/Usb_meter2.jpg/600px-Usb_meter2.jpg||height="800" width="600"]]
323
324 USB
325
326
327 [[image:https://wiki.dragino.com/images/thumb/6/62/Usb_meter1.jpg/600px-Usb_meter1.jpg||height="800" width="600"]]
328
329 USB
330
331
332 (((
333 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.
334 )))
335
336 (((
337 **Example:**  input：01 03 00 31 00 02 95 c4
338 )))
339
340 (((
341 output:01 03 04 00 00 00 42 7A 02
342 )))
343
344 [[image:https://wiki.dragino.com/images/thumb/b/b3/Usb_meter3.jpg/600px-Usb_meter3.jpg||height="466" width="600"]]
345
346 USB
347
348 === 1.3.5 How to configure multiple devices and modify device addresses ===
349
350 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.
351
352 (((
353 Set the device address according to the parameters in the appendix of the MODBUS communication protocol.
354 )))
355
356 [[image:https://wiki.dragino.com/images/thumb/1/1f/Double_meter3.png/600px-Double_meter3.png||alt="Double meter3.png" height="83" width="600"]]
357
358 Example:These two meters are examples of setting parameters and device addresses.
359
360 [[image:https://wiki.dragino.com/images/thumb/e/ee/Double_meter1.jpg/600px-Double_meter1.jpg||alt="Double meter1.jpg" height="800" width="600"]]
361
362 [[image:https://wiki.dragino.com/images/thumb/7/72/Double_meter2.jpg/600px-Double_meter2.jpg||alt="Double meter2.jpg" height="733" width="550"]]
363
364 (((
365 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.
366 )))
367
368 (((
369 We can use AT+CFGDEV to set the device address.
370 )))
371
372 (((
373 We modify the device address 01 of the first energy meter to 02.
374 )))
375
376 [[image:https://wiki.dragino.com/images/6/6b/Double_meter4.png||alt="Double meter4.png" height="141" width="456"]]
377
378 AT+CFGDEV:01 10 00 61 00 01 02 00 02,1
379
380 * 01:device adaress
381
382 * 10:function code
383
384 * 00 61：Register address
385
386 * 00 01：Number of Registers
387
388 * 02：Number of bytes
389
390 * 00 02：Modified device address
391
392 * 1：Check code
393
394 The device address setting of the energy meter is complete.
395
396 Another energy meter is a single active energy meter with a floating-point format.
397
398 Its default device address is 01, and the following are the parameters for configuring two energy meters.
399
400 [[image:https://wiki.dragino.com/images/1/13/Meter11.png||alt="Meter11.png" height="576" width="379"]]
401
402 [[image:https://wiki.dragino.com/images/thumb/7/7e/Meter12.png/600px-Meter12.png||alt="Meter12.png" height="262" width="600"]]
403
404 PAYLOAD:01 08 DF 43 62
405
406 * 08 DF is the valid value of the meter with device address 02.
407 * 43 62 is the valid value of the meter with device address 01.
408
409 == 1.4 Example 4: Circuit Breaker Remote Open Close ==
410
411 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:
412
413 [[image:https://wiki.dragino.com/images/thumb/f/fa/RS485_04_2.png/600px-RS485_04_2.png||height="336" width="600"]]
414
415 Connection
416
417 * [[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
418
419 == 1.5 Example 5: SEM Three Energy Meter with RS485-BL or RS485-LN ==
420
421 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:
422
423 * [[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
424
425 * [[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
426
427 == 1.6 Example 6:CEM C31 485-T1-MID Energy Meter with RS485-LN ==
428
429 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:
430
431 * [[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
432
433 == 1.7 Example 7:Schneider Electric PLC M221 with RS485-BL ==
434
435 [[image:https://wiki.dragino.com/images/thumb/9/97/PLC_M221.png/600px-PLC_M221.png||height="353" width="600"]]
436
437 Network Structure
438
439 * [[Reference Instruction>>url:https://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Schneider%20Electric%20PLC/]]