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Summary

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1 -**Table of Contents:**
1 +(% class="wikigeneratedid" %)
2 + **Contents:**
2 2  
3 3  {{toc/}}
4 4  
6 += 1. Introduction =
5 5  
6 -
7 -
8 -
9 -
10 -= **1. Introduction** =
11 -
12 -
13 13  This article provide the examples for RS485-LN to connect to different type of RS485 sensors.
14 14  
10 +== 1.1 Example 1: Connect to Leak relay and VFD ==
15 15  
16 -== **1.1 Example 1: Connect to Leak relay and VFD** ==
17 -
18 -
19 19  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:
20 20  
21 21  [[image:image-20220527091852-1.png]]
... ... @@ -29,47 +29,36 @@
29 29  Connection
30 30  
31 31  
32 -(% style="color:blue" %)**Related documents:**
25 +Related documents:
33 33  
34 -* System Structure:  [[Solar Pump with Dragino>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Relay_VFD/||style="background-color: rgb(255, 255, 255);"]]
35 -* Explanation on how to integrate to Node-red and to the Mobile Phone, and with link to the Github code:  [[Configure Manual>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Relay_VFD/||style="background-color: rgb(255, 255, 255);"]]
27 +* [[Solar Pump with Dragino>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Relay_VFD/]] : System Structure
28 +* [[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.
36 36  * [[Video Demo>>url:https://www.youtube.com/watch?v=TAFZ5eaf-MY&t=6s&ab_channel=XavierFlorensaBerenguer]]
37 37  
31 +== 1.2 Example 2: Connect to Pulse Counter ==
38 38  
39 -
40 -
41 -== **1.2 Example 2: Connect to Pulse Counter** ==
42 -
43 -
44 44  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:
45 45  
46 -
47 47  [[image:image-20220527092058-3.png]]
48 48  
49 49  Connection
50 50  
51 51  
52 -
53 53  [[image:image-20220527092146-4.png]]
54 54  
55 55  Connection
56 56  
57 -
58 -(% style="color:blue" %)**Related documents:**
59 -
60 -* Configure Document:  [[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/]]
44 +* [[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
61 61  * [[Dragino Solution in Farm>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/&file=Dragino%20on%20Farms.pptx]]
62 62  
47 +== ==
63 63  
49 +== 1.3 Example3: Use RS485-LN with energy meters ==
64 64  
65 -== **1.3 Example3: Use RS485-LN with energy meters** ==
51 +=== 1.3.1 OverView ===
66 66  
67 -
68 -=== **1.3.1 OverView** ===
69 -
70 -
71 71  (((
72 -(% style="color:red" %)**Note**：The specifications of each energy meter are different, please refer to your own energy meter specifications.
54 +**Note**：The specifications of each energy meter are different, please refer to your own energy meter specifications.
73 73  )))
74 74  
75 75  (((
... ... @@ -81,11 +81,8 @@
81 81  Connection1
82 82  
83 83  
84 -
85 85  (((
86 -(% style="color:blue" %)**How to connect with Energy Meter：**
87 -
88 -
67 +How to connect with Energy Meter：
89 89  )))
90 90  
91 91  (((
... ... @@ -118,15 +118,17 @@
118 118  Connection3
119 119  
120 120  
121 -=== **1.3.2 How to use the parameters of the energy meter and MODBUS commands** ===
100 +=== 1.3.2 How to use the parameters of the energy meter and MODBUS commands ===
122 122  
123 -
124 124  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.
125 125  
126 -[[image:image-20220601143257-10.png]]
104 +[[image:image-20220527092629-8.png]]
127 127  
128 128  
129 -(% style="color:blue" %)**Example:**(%%)  AT+COMMAND1=01 03 00 00 00 01 84 0A
107 +(% class="box infomessage" %)
108 +(((
109 +**Example:** AT+COMMAND1=01 03 00 00 00 01 84 0A
110 +)))
130 130  
131 131  * The first byte : slave address code (=001～247)
132 132  * The second byte : read register value function code
... ... @@ -135,12 +135,12 @@
135 135  * 7th and 8th bytes: CRC16 checksum from bytes 1 to 6.
136 136  
137 137  (((
138 -
139 -
140 -
141 141  How to parse the reading of the return command of the parameter：
120 +)))
142 142  
143 -(% style="color:blue" %)**Example:**(%%) RETURN1：01 03 02 08 FD 7E 05
122 +(% class="box infomessage" %)
123 +(((
124 +**Example:** RETURN1：01 03 02 08 FD 7E 05
144 144  )))
145 145  
146 146  * The first byte ARD: slave address code (=001～254)
... ... @@ -153,27 +153,22 @@
153 153  (% class="wikigeneratedid" %)
154 154  (((
155 155  
156 -
157 -
158 -
159 159  )))
160 160  
161 -=== **1.3.3 How to configure RS485-LN and parse output commands** ===
139 +=== 1.3.3 How to configure RS485-LN and parse output commands ===
162 162  
163 -
164 164  RS485-LN provides two configuration methods: AT COMMAND and DOWNLINK.
165 165  
166 166  
167 -==== **1.3.3.1 via AT COMMAND** ====
144 +==== 1.3.3.1 via AT COMMAND: ====
168 168  
146 +First, we can use **AT+CFGDEV** to get the return value, and we can also judge whether the input parameters are correct.
169 169  
170 -First, we can use (% style="color:blue" %)**AT+CFGDEV**(%%) to get the return value, and we can also judge whether the input parameters are correct.
171 -
172 172  (((
173 173  If the configured parameters and commands are incorrect, the return value is not obtained.
174 174  )))
175 175  
176 -[[image:image-20220601143201-9.png]]
152 +[[image:image-20220527092748-9.png]]
177 177  
178 178  AT COMMAND
179 179  
... ... @@ -180,33 +180,31 @@
180 180  
181 181  (% class="box infomessage" %)
182 182  (((
183 - **AT+DATACUTx **:  This command defines how to handle the return from AT+COMMANDx, max reture length is 40 bytes. AT+DATACUTx=a,b,c
159 + AT+DATACUTx : This command defines how to handle the return from AT+COMMANDx, max reture length is 40 bytes. AT+DATACUTx=a,b,c
184 184  )))
185 185  
186 -a:  length for the return of AT+COMMAND
162 +a: length for the return of AT+COMMAND
187 187  
188 -b: 1: grab valid value by byte, max 6 bytes;  2: grab valid value by bytes section, max 3 sections.
164 +b:1: grab valid value by byte, max 6 bytes. 2: grab valid value by bytes section, max 3 sections.
189 189  
190 -c:  define the position for valid value.
166 +c: define the position for valid value.
191 191  
192 -[[image:image-20220601143115-8.png]]
168 +[[image:image-20220527092936-10.png]]
193 193  
194 194  AT COMMAND
195 195  
196 196  
197 -
198 198  PAYLOAD is available after the valid value is intercepted.
199 199  
200 200  
201 -[[image:image-20220601143046-7.png]]
176 +[[image:image-20220527093059-11.png]]
202 202  
203 203  AT COMMAND
204 204  
205 205  
206 -
207 207  You can get configured PAYLOAD on TTN.
208 208  
209 -[[image:image-20220601143519-1.png]]
183 +[[image:image-20220527093133-12.png]]
210 210  
211 211  (((
212 212  AT COMMAND
... ... @@ -217,52 +217,46 @@
217 217  )))
218 218  
219 219  (((
220 -(% style="color:blue" %)**Example**:
221 -
222 -(% style="color:red" %)**CMD1:**(%%) Read current data with MODBUS command. address: 0x03 AT+COMMAND1= 01 03 00 03 00 01,1
194 +**Example**: CMD1:Read current data with MODBUS command. address:0x03 AT+COMMAND1= 01 03 00 03 00 01,1
223 223  )))
224 224  
225 225  (((
226 -RETURN1: 01 03 02 00 02 39 85 00 00(return data)
198 +RETURN1:01 03 02 00 02 39 85 00 00(return data)
227 227  )))
228 228  
229 229  (((
230 -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.
231 -
232 -
202 +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.
233 233  )))
234 234  
235 235  (((
236 -(% style="color:red" %)**CMD2: **(%%)Read voltage data with MODBUS command. address: 0x00 AT+COMMAND2= 01 03 00 00 00 01,1
206 +CMD2:Read voltage data with MODBUS command. address:0x00 AT+COMMAND2= 01 03 00 00 00 01,1
237 237  )))
238 238  
239 239  (((
240 -RETURN2: 01 03 02 08 DC BE 1D(return data)
210 +RETURN2:01 03 02 08 DC BE 1D(return data)
241 241  )))
242 242  
243 243  (((
244 -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.
245 -
246 -
214 +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.
247 247  )))
248 248  
249 249  (((
250 -(% style="color:red" %)**CMD3:**(%%) Read total active energy data with MODBUS command. address: 0x0031 AT+COMMAND3= 01 03 00 31 00 02,1
218 +CMD3:Read total active energy data with MODBUS command. address:0x0031 AT+COMMAND3= 01 03 00 31 00 02,1
251 251  )))
252 252  
253 253  (((
254 -RETURN3: 01 03 04 00 00 00 44 FA 00(return data)
222 +RETURN3:01 03 04 00 00 00 44 FA 00(return data)
255 255  )))
256 256  
257 257  (((
258 -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.
226 +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.
259 259  )))
260 260  
261 261  (((
262 -Payload: 01 00 02 39 85 08 DC 00 00 00 44
230 +Payload:01 00 02 39 85 08 DC 00 00 00 44
263 263  )))
264 264  
265 -[[image:image-20220601142936-6.png]]
233 +[[image:image-20220527093204-13.png]]
266 266  
267 267  AT COMMAND
268 268  
... ... @@ -269,15 +269,13 @@
269 269  
270 270  (% 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.**
271 271  
240 +[[image:image-20220527093251-14.png]]
272 272  
273 -[[image:image-20220601143642-2.png]]
274 -
275 275  AT COMMAND
276 276  
277 277  
278 -==== **1.3.3.2 via LoRaWAN DOWNLINK** ====
245 +==== 1.3.3.2 via LoRaWAN DOWNLINK ====
279 279  
280 -
281 281  [[image:image-20220527093358-15.png]]
282 282  
283 283  (((
... ... @@ -289,7 +289,7 @@
289 289  )))
290 290  
291 291  (((
292 -(% style="color:#4f81bd" %)**Type Code 0xAF**
258 +**Type Code 0xAF**
293 293  )))
294 294  
295 295  (((
... ... @@ -300,7 +300,7 @@
300 300  )))
301 301  
302 302  (((
303 -(% style="color:red" %)Note: if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.
269 +Note: if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.
304 304  )))
305 305  
306 306  (((
... ... @@ -336,45 +336,39 @@
336 336  )))
337 337  
338 338  (((
339 -
340 -
341 -(% style="color:blue" %)**Example:**
305 +Example:
342 342  )))
343 343  
344 344  (((
345 -**AF 03 01 06 0A 05 00 04 00 01 00**: Same as AT+COMMAND3=0A 05 00 04 00 01,1
309 +AF 03 01 06 0A 05 00 04 00 01 00: Same as AT+COMMAND3=0A 05 00 04 00 01,1
346 346  )))
347 347  
348 -[[image:image-20220601144149-6.png]]
312 +[[image:https://wiki.dragino.com/images/thumb/4/45/DOWNLINK_METER2.png/600px-DOWNLINK_METER2.png||height="208" width="600"]]
349 349  
350 350  DOWNLINK
351 351  
352 352  
317 +[[~[~[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]]
353 353  
354 -[[image:image-20220601143803-3.png]]
355 -
356 356  DOWNLINK
357 357  
358 358  
322 +[[image:https://wiki.dragino.com/images/thumb/2/27/DOWNLINK_METER4.png/600px-DOWNLINK_METER4.png||height="210" width="600"]]
359 359  
360 -[[image:image-20220601144053-5.png]]
361 -
362 362  DOWNLINK
363 363  
364 364  
327 +[[~[~[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]]
365 365  
366 -[[image:image-20220601143921-4.png]]
367 -
368 368  DOWNLINK
369 369  
370 370  
332 +[[image:https://wiki.dragino.com/images/thumb/a/a2/DOWNLINK_METER6.png/600px-DOWNLINK_METER6.png||height="365" width="600"]]
371 371  
372 -[[image:image-20220601142805-5.png]]
373 -
374 374  DOWNLINK
375 375  
376 376  
377 -=== **1.3.4 How to configure and output commands for RS485 to USB** ===
337 +=== 1.3.4 How to configure and output commands for RS485 to USB ===
378 378  
379 379  (((
380 380  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.
... ... @@ -394,46 +394,36 @@
394 394  
395 395  (((
396 396  check digit: Even
397 -
398 -
399 399  )))
400 400  
401 -[[image:image-20220527093708-21.png]]
359 +[[image:https://wiki.dragino.com/images/thumb/8/8f/Usb_meter2.jpg/600px-Usb_meter2.jpg||height="725" width="544"]]
402 402  
403 403  USB
404 404  
405 405  
364 +[[image:https://wiki.dragino.com/images/thumb/6/62/Usb_meter1.jpg/600px-Usb_meter1.jpg||height="728" width="546"]]
406 406  
407 -[[image:image-20220527093747-22.png]]
408 -
409 409  USB
410 410  
411 411  
412 -
413 413  (((
414 414  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.
415 -
416 -
417 417  )))
418 418  
419 419  (((
420 -(% style="color:blue" %)**Example:**  (%%)input：01 03 00 31 00 02 95 c4
374 +**Example:**  input：01 03 00 31 00 02 95 c4
421 421  )))
422 422  
423 423  (((
424 424   output：01 03 04 00 00 00 42 7A 02
425 -
426 -
427 427  )))
428 428  
429 -[[image:image-20220527093821-23.png]]
381 +[[image:https://wiki.dragino.com/images/thumb/b/b3/Usb_meter3.jpg/600px-Usb_meter3.jpg||height="466" width="600"]]
430 430  
431 431  USB
432 432  
385 +=== 1.3.5 How to configure multiple devices and modify device addresses ===
433 433  
434 -=== **1.3.5 How to configure multiple devices and modify device addresses** ===
435 -
436 -
437 437  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.
438 438  
439 439  (((
... ... @@ -442,17 +442,14 @@
442 442  )))
443 443  )))
444 444  
445 -[[image:image-20220601142044-1.png]]
395 +[[image:https://wiki.dragino.com/images/thumb/1/1f/Double_meter3.png/600px-Double_meter3.png||alt="Double meter3.png" height="83" width="600"]]
446 446  
397 +**Example**:These two meters are examples of setting parameters and device addresses.
447 447  
448 -(% style="color:blue" %)**Example**(%%): These two meters are examples of setting parameters and device addresses.
399 +[[image:https://wiki.dragino.com/images/thumb/e/ee/Double_meter1.jpg/600px-Double_meter1.jpg||alt="Double meter1.jpg" height="737" width="553"]]
449 449  
450 -[[image:image-20220527093950-25.png]]
401 +[[image:https://wiki.dragino.com/images/thumb/7/72/Double_meter2.jpg/600px-Double_meter2.jpg||alt="Double meter2.jpg" height="733" width="550"]]
451 451  
452 -
453 -[[image:image-20220527094028-26.png]]
454 -
455 -
456 456  (((
457 457  (((
458 458  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.
... ... @@ -461,7 +461,7 @@
461 461  
462 462  (((
463 463  (((
464 -We can use **AT+CFGDEV** to set the device address.
411 +We can use AT+CFGDEV to set the device address.
465 465  )))
466 466  )))
467 467  
... ... @@ -471,14 +471,10 @@
471 471  )))
472 472  )))
473 473  
474 -[[image:image-20220601142354-2.png]]
421 +[[image:https://wiki.dragino.com/images/6/6b/Double_meter4.png||alt="Double meter4.png" height="141" width="456"]]
475 475  
423 +AT+CFGDEV:01 10 00 61 00 01 02 00 02,1
476 476  
477 -(% class="box infomessage" %)
478 -(((
479 -**AT+CFGDEV:01 10 00 61 00 01 02 00 02,1**
480 -)))
481 -
482 482  * 01:device adaress
483 483  
484 484  * 10:function code
... ... @@ -499,52 +499,43 @@
499 499  
500 500  Its default device address is 01, and the following are the parameters for configuring two energy meters.
501 501  
502 -[[image:image-20220601142452-3.png]]
445 +[[image:https://wiki.dragino.com/images/1/13/Meter11.png||alt="Meter11.png" height="576" width="379"]]
503 503  
447 +[[image:https://wiki.dragino.com/images/thumb/7/7e/Meter12.png/600px-Meter12.png||alt="Meter12.png" height="262" width="600"]]
504 504  
505 -[[image:image-20220601142607-4.png]]
449 +PAYLOAD:01 08 DF 43 62
506 506  
507 -
508 -**PAYLOAD:01 08 DF 43 62**
509 -
510 510  * 08 DF is the valid value of the meter with device address 02.
511 511  * 43 62 is the valid value of the meter with device address 01.
512 512  
513 513  == 1.4 Example 4: Circuit Breaker Remote Open Close ==
514 514  
456 +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:
515 515  
516 -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.
458 +[[image:https://wiki.dragino.com/images/thumb/f/fa/RS485_04_2.png/600px-RS485_04_2.png||height="336" width="600"]]
517 517  
518 -The structure is like below:
519 -
520 -[[image:image-20220527094330-30.png]]
521 -
522 522  Connection
523 523  
462 +* [[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
524 524  
525 -* Configure Documen:  [[Circuit Breaker Remote Open Close>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Circuit_Breaker_Remote_Open_Close/]]
526 -
527 527  == 1.5 Example 5: SEM Three Energy Meter with RS485-BL or RS485-LN ==
528 528  
529 -
530 530  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:
531 531  
532 -* Configure Document For RS485-BL:  [[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||style="background-color: rgb(255, 255, 255);"]]
533 -* Configure Document for RS485-LN:  [[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]]
468 +* [[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
534 534  
535 -== 1.6 Example 6: CEM C31 485-T1-MID Energy Meter with RS485-LN ==
470 +* [[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
536 536  
472 +== 1.6 Example 6:CEM C31 485-T1-MID Energy Meter with RS485-LN ==
537 537  
538 538  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:
539 539  
540 -* Configure Document For RS485-LN:  [[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||style="background-color: rgb(255, 255, 255);"]]
476 +* [[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
541 541  
542 -== 1.7 Example 7: Schneider Electric PLC M221 with RS485-BL ==
478 +== 1.7 Example 7:Schneider Electric PLC M221 with RS485-BL ==
543 543  
480 +[[image:https://wiki.dragino.com/images/thumb/9/97/PLC_M221.png/600px-PLC_M221.png||height="353" width="600"]]
544 544  
545 -[[image:image-20220527094556-31.png]]
546 -
547 547  Network Structure
548 548  
549 -
550 550  * [[Reference Instruction>>url:https://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Schneider%20Electric%20PLC/]]
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