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Version 1.10 by Xiaoling on 2022/05/12 10:05
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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
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 [[image:https://wiki.dragino.com/images/thumb/5/5f/RS485_02_2.png/600px-RS485_02_2.png||height="337" width="600"]]
33
34 Connection
35
36 * [[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
37 * [[Dragino Solution in Farm>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/&file=Dragino%20on%20Farms.pptx]]
38
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="800" width="600"]]
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="450" width="600"]]
69
70 Connection2
71
72 [[image:https://wiki.dragino.com/images/thumb/a/a5/Meter3.jpg/600px-Meter3.jpg||height="800" width="600"]]
73
74 Connection3
75
76
77 === 1.3.2 How to use the parameters of the energy meter and MODBUS commands ===
78
79 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.
80
81 [[image:https://wiki.dragino.com/images/thumb/3/35/Meter4.png/600px-Meter4.png||alt="Meter4.png" height="193" width="600"]]
82
83 (% class="box infomessage" %)
84 (((
85 Example:AT+COMMAND1=01 03 00 00 00 01 84 0A
86 )))
87
88 * The first byte : slave address code (=001～247)
89 * The second byte : read register value function code
90 * 3rd and 4th bytes: start address of register to be read
91 * 5th and 6th bytes: Number of registers to read
92 * 7th and 8th bytes: CRC16 checksum from bytes 1 to 6.
93
94 How to parse the reading of the return command of the parameter：
95
96 (% class="box infomessage" %)
97 (((
98 Example:RETURN1：01 03 02 08 FD 7E 05
99 )))
100
101 * The first byte ARD: slave address code (=001～254)
102 * The second byte: Return to read function code
103 * 3rd byte: total number of bytes
104 * 4th～5th bytes: register data
105 * The 6th and 7th bytes: CRC16 checksum
106 * 08 FD is register data. Use short integer 16 bits to convert to decimal, get 2301, then 230.1V is the voltage.
107
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 AT COMMAND
153
154 **Example**: CMD1:Read current data with MODBUS command. address:0x03 AT+COMMAND1= 01 03 00 03 00 01,1
155
156 RETURN1:01 03 02 00 02 39 85 00 00(return data)
157
158 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.
159
160 CMD2:Read voltage data with MODBUS command. address:0x00 AT+COMMAND2= 01 03 00 00 00 01,1
161
162 RETURN2:01 03 02 08 DC BE 1D(return data)
163
164 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.
165
166 CMD3:Read total active energy data with MODBUS command. address:0x0031 AT+COMMAND3= 01 03 00 31 00 02,1
167
168 RETURN3:01 03 04 00 00 00 44 FA 00(return data)
169
170 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.
171
172 Payload:01 00 02 39 85 08 DC 00 00 00 44
173
174 [[image:https://wiki.dragino.com/images/thumb/9/9b/AT_COMMAND10.png/600px-AT_COMMAND10.png||height="278" width="600"]]
175
176 AT COMMAND
177
178 01 is device address,00 02 is the current, 08 DC is the voltage,00 00 00 44 is the total active energy.
179
180
181 [[~[~[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]]
182
183 AT COMMAND
184
185
186 ==== 1.3.3.2 via LoRaWAN DOWNLINK ====
187
188 [[image:https://wiki.dragino.com/images/thumb/f/fc/DOWNLINK_METER1.png/600px-DOWNLINK_METER1.png||height="423" width="600"]]
189
190 (((
191 DOWNLINK
192 )))
193
194 (((
195
196 )))
197
198 (((
199 Type Code 0xAF
200 )))
201
202 (((
203 0xAF downlink command can be used to set AT+COMMANDx or AT+DATACUTx.
204 )))
205
206 (((
207 Note: if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.
208 )))
209
210 (((
211 Format: AF MM NN LL XX XX XX XX YY
212 )))
213
214 (((
215 Where:
216 )))
217
218 (((
219 MM: the ATCOMMAND or AT+DATACUT to be set. Value from 01 ~~ 0F,
220 )))
221
222 (((
223 NN: 0: no CRC; 1: add CRC-16/MODBUS ; 2: set the AT+DATACUT value.
224 )))
225
226 (((
227 LL: The length of AT+COMMAND or AT+DATACUT command
228 )))
229
230 (((
231 XX XX XX XX: AT+COMMAND or AT+DATACUT command
232 )))
233
234 (((
235 YY: If YY=0, RS485-LN will execute the downlink command without uplink; if YY=1, RS485-LN
236 )))
237
238 (((
239 will execute an uplink after got this command.
240 )))
241
242 (((
243 Example:
244 )))
245
246 (((
247 AF 03 01 06 0A 05 00 04 00 01 00: Same as AT+COMMAND3=0A 05 00 04 00 01,1
248 )))
249
250 [[image:https://wiki.dragino.com/images/thumb/4/45/DOWNLINK_METER2.png/600px-DOWNLINK_METER2.png||height="208" width="600"]]
251
252 DOWNLINK
253
254
255 [[~[~[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]]
256
257 DOWNLINK
258
259
260 [[image:https://wiki.dragino.com/images/thumb/2/27/DOWNLINK_METER4.png/600px-DOWNLINK_METER4.png||height="210" width="600"]]
261
262 DOWNLINK
263
264
265 [[~[~[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]]
266
267 DOWNLINK
268
269 [[image:https://wiki.dragino.com/images/thumb/a/a2/DOWNLINK_METER6.png/600px-DOWNLINK_METER6.png||height="365" width="600"]]
270
271 DOWNLINK
272
273
274 === 1.3.4 How to configure and output commands for RS485 to USB ===
275
276 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.
277
278 First, connect the A+ and A- of the USB to the 485 A and 485 B of the energy meter.
279
280 Open the serial port debugging, set the send and receive to HEX.
281
282 Baud rate: 9600
283
284 check digit: Even
285
286 [[image:https://wiki.dragino.com/images/thumb/8/8f/Usb_meter2.jpg/600px-Usb_meter2.jpg||height="800" width="600"]]
287
288 USB
289
290 [[image:https://wiki.dragino.com/images/thumb/6/62/Usb_meter1.jpg/600px-Usb_meter1.jpg||height="800" width="600"]]
291
292 USB
293
294 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.
295
296 Example:input：01 03 00 31 00 02 95 c4
297
298 {{{ output:01 03 04 00 00 00 42 7A 02
299 }}}
300
301 [[image:https://wiki.dragino.com/images/thumb/b/b3/Usb_meter3.jpg/600px-Usb_meter3.jpg||height="466" width="600"]]
302
303 USB
304
305 === 1.3.5 How to configure multiple devices and modify device addresses ===
306
307 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.
308
309 Set the device address according to the parameters in the appendix of the MODBUS communication protocol.
310
311 [[image:https://wiki.dragino.com/images/thumb/1/1f/Double_meter3.png/600px-Double_meter3.png||alt="Double meter3.png" height="83" width="600"]]
312
313 Example:These two meters are examples of setting parameters and device addresses.
314
315 [[image:https://wiki.dragino.com/images/thumb/e/ee/Double_meter1.jpg/600px-Double_meter1.jpg||alt="Double meter1.jpg" height="800" width="600"]]
316
317 [[image:https://wiki.dragino.com/images/thumb/7/72/Double_meter2.jpg/600px-Double_meter2.jpg||alt="Double meter2.jpg" height="800" width="600"]]
318
319 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.
320
321 We can use AT+CFGDEV to set the device address.
322
323 We modify the device address 01 of the first energy meter to 02.
324
325 [[image:https://wiki.dragino.com/images/6/6b/Double_meter4.png||alt="Double meter4.png" height="141" width="456"]]
326
327 AT+CFGDEV:01 10 00 61 00 01 02 00 02,1
328
329 * 01:device adaress
330
331 * 10:function code
332
333 * 00 61：Register address
334
335 * 00 01：Number of Registers
336
337 * 02：Number of bytes
338
339 * 00 02：Modified device address
340
341 * 1：Check code
342
343 The device address setting of the energy meter is complete.
344
345 Another energy meter is a single active energy meter with a floating-point format.
346
347 Its default device address is 01, and the following are the parameters for configuring two energy meters.
348
349 [[image:https://wiki.dragino.com/images/1/13/Meter11.png||alt="Meter11.png" height="576" width="379"]]
350
351 [[image:https://wiki.dragino.com/images/thumb/7/7e/Meter12.png/600px-Meter12.png||alt="Meter12.png" height="262" width="600"]]
352
353 PAYLOAD:01 08 DF 43 62
354
355 * 08 DF is the valid value of the meter with device address 02.
356 * 43 62 is the valid value of the meter with device address 01.
357
358
359 == 1.4 Example 4: Circuit Breaker Remote Open Close ==
360
361 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:
362
363 [[image:https://wiki.dragino.com/images/thumb/f/fa/RS485_04_2.png/600px-RS485_04_2.png||height="336" width="600"]]
364
365 Connection
366
367 * [[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
368
369
370 == 1.5 Example 5: SEM Three Energy Meter with RS485-BL or RS485-LN ==
371
372 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:
373
374 * [[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
375
376 * [[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
377
378
379 == 1.6 Example 6:CEM C31 485-T1-MID Energy Meter with RS485-LN ==
380
381 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:
382
383 * [[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
384
385
386 == 1.7 Example 7:Schneider Electric PLC M221 with RS485-BL ==
387
388 [[image:https://wiki.dragino.com/images/thumb/9/97/PLC_M221.png/600px-PLC_M221.png||height="353" width="600"]]
389
390 Network Structure
391
392 * [[Reference Instruction>>url:https://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Schneider%20Electric%20PLC/]]