Last modified by Karry Zhuang on 2024/07/11 11:58
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From version < 1.8 >
edited by Xiaoling
on 2022/05/12 10:03
To version < 4.8 >
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10 10  
11 11  Connection
12 12  
13 +
13 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 14  
15 15  Connection
... ... @@ -20,7 +20,6 @@
20 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 21  * [[Video Demo>>url:https://www.youtube.com/watch?v=TAFZ5eaf-MY&t=6s&ab_channel=XavierFlorensaBerenguer]]
22 22  
23 -
24 24  == 1.2 Example 2: Connect to Pulse Counter ==
25 25  
26 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:
... ... @@ -29,6 +29,7 @@
29 29  
30 30  Connection
31 31  
32 +
32 32  [[image:https://wiki.dragino.com/images/thumb/5/5f/RS485_02_2.png/600px-RS485_02_2.png||height="337" width="600"]]
33 33  
34 34  Connection
... ... @@ -36,7 +36,6 @@
36 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 37  * [[Dragino Solution in Farm>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/&file=Dragino%20on%20Farms.pptx]]
38 38  
39 -
40 40  == 1.3 Example3: Use RS485-LN with energy meters ==
41 41  
42 42  === 1.3.1 OverView ===
... ... @@ -49,28 +49,41 @@
49 49  This example describes a single-phase meter.This is the connection between the RS485-LN and the energy meter.
50 50  )))
51 51  
52 -[[image:https://wiki.dragino.com/images/thumb/f/f4/Meter1.jpg/600px-Meter1.jpg||height="800" width="600"]]
52 +[[image:https://wiki.dragino.com/images/thumb/f/f4/Meter1.jpg/600px-Meter1.jpg||height="726" width="545"]]
53 53  
54 54  Connection1
55 55  
56 +(((
56 56  How to connect with Energy Meter：
58 +)))
57 57  
60 +(((
58 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.
62 +)))
59 59  
64 +(((
60 60  The RS485-LN can be powered by 7 ~~ 24V DC power source. Connection as below
66 +)))
61 61  
68 +(((
62 62  Power Source VIN to RS485-LN VIN+
70 +)))
63 63  
72 +(((
64 64  Power Source GND to RS485-LN VIN-
74 +)))
65 65  
76 +(((
66 66  Once there is power, the RS485-LN will be on.
78 +)))
67 67  
68 -[[image:https://wiki.dragino.com/images/thumb/1/15/Meter2.jpg/600px-Meter2.jpg||height="450" width="600"]]
80 +[[image:https://wiki.dragino.com/images/thumb/1/15/Meter2.jpg/600px-Meter2.jpg||height="433" width="577"]]
69 69  
70 70  Connection2
71 71  
72 -[[image:https://wiki.dragino.com/images/thumb/a/a5/Meter3.jpg/600px-Meter3.jpg||height="800" width="600"]]
73 73  
85 +[[image:https://wiki.dragino.com/images/thumb/a/a5/Meter3.jpg/600px-Meter3.jpg||height="712" width="534"]]
86 +
74 74  Connection3
75 75  
76 76  
... ... @@ -91,7 +91,9 @@
91 91  * 5th and 6th bytes: Number of registers to read
92 92  * 7th and 8th bytes: CRC16 checksum from bytes 1 to 6.
93 93  
107 +(((
94 94  How to parse the reading of the return command of the parameter：
109 +)))
95 95  
96 96  (% class="box infomessage" %)
97 97  (((
... ... @@ -105,7 +105,6 @@
105 105  * The 6th and 7th bytes: CRC16 checksum
106 106  * 08 FD is register data. Use short integer 16 bits to convert to decimal, get 2301, then 230.1V is the voltage.
107 107  
108 -
109 109  === 1.3.3 How to configure RS485-LN and parse output commands ===
110 110  
111 111  RS485-LN provides two configuration methods: AT COMMAND and DOWNLINK.
... ... @@ -120,11 +120,11 @@
120 120  
121 121  [[image:https://wiki.dragino.com/images/b/bc/AT_COMMAND1.png||height="358" width="456"]]
122 122  
123 -**AT COMMAND**
137 +AT COMMAND
124 124  
125 125  (% class="box infomessage" %)
126 126  (((
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
141 + AT+DATACUTx : This command defines how to handle the return from AT+COMMANDx, max reture length is 40 bytes. AT+DATACUTx=a,b,c
128 128  )))
129 129  
130 130  a: length for the return of AT+COMMAND
... ... @@ -149,27 +149,53 @@
149 149  
150 150  [[image:https://wiki.dragino.com/images/thumb/c/c2/AT_COMMAND3.png/600px-AT_COMMAND3.png||height="138" width="600"]]
151 151  
166 +(((
152 152  AT COMMAND
168 +)))
153 153  
170 +(((
171 +
172 +)))
173 +
174 +(((
154 154  **Example**: CMD1:Read current data with MODBUS command. address:0x03 AT+COMMAND1= 01 03 00 03 00 01,1
176 +)))
155 155  
178 +(((
156 156  RETURN1:01 03 02 00 02 39 85 00 00(return data)
180 +)))
157 157  
182 +(((
158 158  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.
184 +)))
159 159  
186 +(((
160 160  CMD2:Read voltage data with MODBUS command. address:0x00 AT+COMMAND2= 01 03 00 00 00 01,1
188 +)))
161 161  
190 +(((
162 162  RETURN2:01 03 02 08 DC BE 1D(return data)
192 +)))
163 163  
194 +(((
164 164  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.
196 +)))
165 165  
198 +(((
166 166  CMD3:Read total active energy data with MODBUS command. address:0x0031 AT+COMMAND3= 01 03 00 31 00 02,1
200 +)))
167 167  
202 +(((
168 168  RETURN3:01 03 04 00 00 00 44 FA 00(return data)
204 +)))
169 169  
206 +(((
170 170  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.
208 +)))
171 171  
210 +(((
172 172  Payload:01 00 02 39 85 08 DC 00 00 00 44
212 +)))
173 173  
174 174  [[image:https://wiki.dragino.com/images/thumb/9/9b/AT_COMMAND10.png/600px-AT_COMMAND10.png||height="278" width="600"]]
175 175  
... ... @@ -185,35 +185,70 @@
185 185  
186 186  ==== 1.3.3.2 via LoRaWAN DOWNLINK ====
187 187  
188 -[[image:https://wiki.dragino.com/images/thumb/f/fc/DOWNLINK_METER1.png/600px-DOWNLINK_METER1.png||height="423" width="600"]]
228 +[[image:image-20220512104358-3.png]]
189 189  
230 +(((
190 190  DOWNLINK
232 +)))
191 191  
192 -Type Code 0xAF
234 +(((
235 +
236 +)))
193 193  
238 +(((
239 +**Type Code 0xAF**
240 +)))
241 +
242 +(((
243 +(% class="box infomessage" %)
244 +(((
194 194  0xAF downlink command can be used to set AT+COMMANDx or AT+DATACUTx.
246 +)))
247 +)))
195 195  
249 +(((
196 196  Note: if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.
251 +)))
197 197  
253 +(((
198 198  Format: AF MM NN LL XX XX XX XX YY
255 +)))
199 199  
257 +(((
200 200  Where:
259 +)))
201 201  
261 +(((
202 202  MM: the ATCOMMAND or AT+DATACUT to be set. Value from 01 ~~ 0F,
263 +)))
203 203  
265 +(((
204 204  NN: 0: no CRC; 1: add CRC-16/MODBUS ; 2: set the AT+DATACUT value.
267 +)))
205 205  
269 +(((
206 206  LL: The length of AT+COMMAND or AT+DATACUT command
271 +)))
207 207  
273 +(((
208 208  XX XX XX XX: AT+COMMAND or AT+DATACUT command
275 +)))
209 209  
277 +(((
210 210  YY: If YY=0, RS485-LN will execute the downlink command without uplink; if YY=1, RS485-LN
279 +)))
211 211  
281 +(((
212 212  will execute an uplink after got this command.
283 +)))
213 213  
285 +(((
214 214  Example:
287 +)))
215 215  
289 +(((
216 216  AF 03 01 06 0A 05 00 04 00 01 00: Same as AT+COMMAND3=0A 05 00 04 00 01,1
291 +)))
217 217  
218 218  [[image:https://wiki.dragino.com/images/thumb/4/45/DOWNLINK_METER2.png/600px-DOWNLINK_METER2.png||height="208" width="600"]]
219 219  
... ... @@ -234,6 +234,7 @@
234 234  
235 235  DOWNLINK
236 236  
312 +
237 237  [[image:https://wiki.dragino.com/images/thumb/a/a2/DOWNLINK_METER6.png/600px-DOWNLINK_METER6.png||height="365" width="600"]]
238 238  
239 239  DOWNLINK
... ... @@ -241,30 +241,47 @@
241 241  
242 242  === 1.3.4 How to configure and output commands for RS485 to USB ===
243 243  
320 +(((
244 244  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.
322 +)))
245 245  
324 +(((
246 246  First, connect the A+ and A- of the USB to the 485 A and 485 B of the energy meter.
326 +)))
247 247  
328 +(((
248 248  Open the serial port debugging, set the send and receive to HEX.
330 +)))
249 249  
332 +(((
250 250  Baud rate: 9600
334 +)))
251 251  
336 +(((
252 252  check digit: Even
338 +)))
253 253  
254 -[[image:https://wiki.dragino.com/images/thumb/8/8f/Usb_meter2.jpg/600px-Usb_meter2.jpg||height="800" width="600"]]
340 +[[image:https://wiki.dragino.com/images/thumb/8/8f/Usb_meter2.jpg/600px-Usb_meter2.jpg||height="725" width="544"]]
255 255  
256 256  USB
257 257  
258 -[[image:https://wiki.dragino.com/images/thumb/6/62/Usb_meter1.jpg/600px-Usb_meter1.jpg||height="800" width="600"]]
259 259  
345 +[[image:https://wiki.dragino.com/images/thumb/6/62/Usb_meter1.jpg/600px-Usb_meter1.jpg||height="728" width="546"]]
346 +
260 260  USB
261 261  
349 +
350 +(((
262 262  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.
352 +)))
263 263  
264 -Example:input：01 03 00 31 00 02 95 c4
354 +(((
355 +**Example:**  input：01 03 00 31 00 02 95 c4
356 +)))
265 265  
266 -{{{ output:01 03 04 00 00 00 42 7A 02
267 -}}}
358 +(((
359 + output：01 03 04 00 00 00 42 7A 02
360 +)))
268 268  
269 269  [[image:https://wiki.dragino.com/images/thumb/b/b3/Usb_meter3.jpg/600px-Usb_meter3.jpg||height="466" width="600"]]
270 270  
... ... @@ -274,21 +274,37 @@
274 274  
275 275  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.
276 276  
370 +(((
371 +(((
277 277  Set the device address according to the parameters in the appendix of the MODBUS communication protocol.
373 +)))
374 +)))
278 278  
279 279  [[image:https://wiki.dragino.com/images/thumb/1/1f/Double_meter3.png/600px-Double_meter3.png||alt="Double meter3.png" height="83" width="600"]]
280 280  
281 -Example:These two meters are examples of setting parameters and device addresses.
378 +**Example**:These two meters are examples of setting parameters and device addresses.
282 282  
283 -[[image:https://wiki.dragino.com/images/thumb/e/ee/Double_meter1.jpg/600px-Double_meter1.jpg||alt="Double meter1.jpg" height="800" width="600"]]
380 +[[image:https://wiki.dragino.com/images/thumb/e/ee/Double_meter1.jpg/600px-Double_meter1.jpg||alt="Double meter1.jpg" height="737" width="553"]]
284 284  
285 -[[image:https://wiki.dragino.com/images/thumb/7/72/Double_meter2.jpg/600px-Double_meter2.jpg||alt="Double meter2.jpg" height="800" width="600"]]
382 +[[image:https://wiki.dragino.com/images/thumb/7/72/Double_meter2.jpg/600px-Double_meter2.jpg||alt="Double meter2.jpg" height="733" width="550"]]
286 286  
384 +(((
385 +(((
287 287  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.
387 +)))
388 +)))
288 288  
390 +(((
391 +(((
289 289  We can use AT+CFGDEV to set the device address.
393 +)))
394 +)))
290 290  
396 +(((
397 +(((
291 291  We modify the device address 01 of the first energy meter to 02.
399 +)))
400 +)))
292 292  
293 293  [[image:https://wiki.dragino.com/images/6/6b/Double_meter4.png||alt="Double meter4.png" height="141" width="456"]]
294 294  
... ... @@ -323,7 +323,6 @@
323 323  * 08 DF is the valid value of the meter with device address 02.
324 324  * 43 62 is the valid value of the meter with device address 01.
325 325  
326 -
327 327  == 1.4 Example 4: Circuit Breaker Remote Open Close ==
328 328  
329 329  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:
... ... @@ -334,7 +334,6 @@
334 334  
335 335  * [[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
336 336  
337 -
338 338  == 1.5 Example 5: SEM Three Energy Meter with RS485-BL or RS485-LN ==
339 339  
340 340  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:
... ... @@ -343,7 +343,6 @@
343 343  
344 344  * [[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
345 345  
346 -
347 347  == 1.6 Example 6:CEM C31 485-T1-MID Energy Meter with RS485-LN ==
348 348  
349 349  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:
... ... @@ -350,7 +350,6 @@
350 350  
351 351  * [[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
352 352  
353 -
354 354  == 1.7 Example 7:Schneider Electric PLC M221 with RS485-BL ==
355 355  
356 356  [[image:https://wiki.dragino.com/images/thumb/9/97/PLC_M221.png/600px-PLC_M221.png||height="353" width="600"]]
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