Last modified by Karry Zhuang on 2024/07/11 11:58
<
From version < 57.14 >
edited by Xiaoling
on 2022/07/14 09:50
To version < 22.1 >
edited by Xiaoling
on 2022/05/27 09:34
>
Change comment: Uploaded new attachment "image-20220527093430-16.png", version {1}

Summary

Details

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Content
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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]]
... ... @@ -35,33 +35,30 @@
35 35  * [[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  
38 -== **1.2 Example 2: Connect to Pulse Counter** ==
31 +== 1.2 Example 2: Connect to Pulse Counter ==
39 39  
40 -
41 41  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:
42 42  
43 -
44 44  [[image:image-20220527092058-3.png]]
45 45  
46 46  Connection
47 47  
48 48  
49 -
50 50  [[image:image-20220527092146-4.png]]
51 51  
52 52  Connection
53 53  
54 -
55 -* 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
56 56  * [[Dragino Solution in Farm>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/&file=Dragino%20on%20Farms.pptx]]
57 57  
58 -== **1.3 Example3: Use RS485-LN with energy meters** ==
47 +== ==
59 59  
60 -=== **1.3.1 OverView** ===
49 +== 1.3 Example3: Use RS485-LN with energy meters ==
61 61  
51 +=== 1.3.1 OverView ===
62 62  
63 63  (((
64 -(% 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.
65 65  )))
66 66  
67 67  (((
... ... @@ -73,11 +73,8 @@
73 73  Connection1
74 74  
75 75  
76 -
77 77  (((
78 -**How to connect with Energy Meter：**
79 -
80 -
67 +How to connect with Energy Meter：
81 81  )))
82 82  
83 83  (((
... ... @@ -105,21 +105,22 @@
105 105  Connection2
106 106  
107 107  
108 -
109 109  [[image:image-20220527092555-7.png]]
110 110  
111 111  Connection3
112 112  
113 113  
114 -=== **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 ===
115 115  
116 -
117 117  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.
118 118  
119 -[[image:image-20220601143257-10.png]]
104 +[[image:image-20220527092629-8.png]]
120 120  
121 121  
122 -(% 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 +)))
123 123  
124 124  * The first byte : slave address code (=001～247)
125 125  * The second byte : read register value function code
... ... @@ -128,12 +128,12 @@
128 128  * 7th and 8th bytes: CRC16 checksum from bytes 1 to 6.
129 129  
130 130  (((
131 -
132 -
133 -
134 134  How to parse the reading of the return command of the parameter：
120 +)))
135 135  
136 -(% 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
137 137  )))
138 138  
139 139  * The first byte ARD: slave address code (=001～254)
... ... @@ -146,27 +146,22 @@
146 146  (% class="wikigeneratedid" %)
147 147  (((
148 148  
149 -
150 -
151 -
152 152  )))
153 153  
154 -=== **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 ===
155 155  
156 -
157 157  RS485-LN provides two configuration methods: AT COMMAND and DOWNLINK.
158 158  
159 159  
160 -==== **1.3.3.1 via AT COMMAND** ====
144 +==== 1.3.3.1 via AT COMMAND: ====
161 161  
146 +First, we can use **AT+CFGDEV** to get the return value, and we can also judge whether the input parameters are correct.
162 162  
163 -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.
164 -
165 165  (((
166 166  If the configured parameters and commands are incorrect, the return value is not obtained.
167 167  )))
168 168  
169 -[[image:image-20220601143201-9.png]]
152 +[[image:image-20220527092748-9.png]]
170 170  
171 171  AT COMMAND
172 172  
... ... @@ -173,33 +173,31 @@
173 173  
174 174  (% class="box infomessage" %)
175 175  (((
176 - **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
177 177  )))
178 178  
179 -a:  length for the return of AT+COMMAND
162 +a: length for the return of AT+COMMAND
180 180  
181 -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.
182 182  
183 -c:  define the position for valid value.
166 +c: define the position for valid value.
184 184  
185 -[[image:image-20220601143115-8.png]]
168 +[[image:image-20220527092936-10.png]]
186 186  
187 187  AT COMMAND
188 188  
189 189  
190 -
191 191  PAYLOAD is available after the valid value is intercepted.
192 192  
193 193  
194 -[[image:image-20220601143046-7.png]]
176 +[[image:image-20220527093059-11.png]]
195 195  
196 196  AT COMMAND
197 197  
198 198  
199 -
200 200  You can get configured PAYLOAD on TTN.
201 201  
202 -[[image:image-20220601143519-1.png]]
183 +[[image:image-20220527093133-12.png]]
203 203  
204 204  (((
205 205  AT COMMAND
... ... @@ -210,52 +210,46 @@
210 210  )))
211 211  
212 212  (((
213 -(% style="color:blue" %)**Example**:
214 -
215 -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
216 216  )))
217 217  
218 218  (((
219 -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)
220 220  )))
221 221  
222 222  (((
223 -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.
224 -
225 -
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.
226 226  )))
227 227  
228 228  (((
229 -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
230 230  )))
231 231  
232 232  (((
233 -RETURN2: 01 03 02 08 DC BE 1D(return data)
210 +RETURN2:01 03 02 08 DC BE 1D(return data)
234 234  )))
235 235  
236 236  (((
237 -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.
238 -
239 -
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.
240 240  )))
241 241  
242 242  (((
243 -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
244 244  )))
245 245  
246 246  (((
247 -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)
248 248  )))
249 249  
250 250  (((
251 -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.
252 252  )))
253 253  
254 254  (((
255 -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
256 256  )))
257 257  
258 -[[image:image-20220601142936-6.png]]
233 +[[image:image-20220527093204-13.png]]
259 259  
260 260  AT COMMAND
261 261  
... ... @@ -262,15 +262,13 @@
262 262  
263 263  (% 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.**
264 264  
240 +[[image:image-20220527093251-14.png]]
265 265  
266 -[[image:image-20220601143642-2.png]]
267 -
268 268  AT COMMAND
269 269  
270 270  
271 -==== **1.3.3.2 via LoRaWAN DOWNLINK** ====
245 +==== 1.3.3.2 via LoRaWAN DOWNLINK ====
272 272  
273 -
274 274  [[image:image-20220527093358-15.png]]
275 275  
276 276  (((
... ... @@ -282,7 +282,7 @@
282 282  )))
283 283  
284 284  (((
285 -(% style="color:#4f81bd" %)**Type Code 0xAF**
258 +**Type Code 0xAF**
286 286  )))
287 287  
288 288  (((
... ... @@ -293,7 +293,7 @@
293 293  )))
294 294  
295 295  (((
296 -(% 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.
297 297  )))
298 298  
299 299  (((
... ... @@ -329,45 +329,39 @@
329 329  )))
330 330  
331 331  (((
332 -
333 -
334 -(% style="color:blue" %)**Example:**
305 +Example:
335 335  )))
336 336  
337 337  (((
338 -**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
339 339  )))
340 340  
341 -[[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"]]
342 342  
343 343  DOWNLINK
344 344  
345 345  
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]]
346 346  
347 -[[image:image-20220601143803-3.png]]
348 -
349 349  DOWNLINK
350 350  
351 351  
322 +[[image:https://wiki.dragino.com/images/thumb/2/27/DOWNLINK_METER4.png/600px-DOWNLINK_METER4.png||height="210" width="600"]]
352 352  
353 -[[image:image-20220601144053-5.png]]
354 -
355 355  DOWNLINK
356 356  
357 357  
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]]
358 358  
359 -[[image:image-20220601143921-4.png]]
360 -
361 361  DOWNLINK
362 362  
363 363  
332 +[[image:https://wiki.dragino.com/images/thumb/a/a2/DOWNLINK_METER6.png/600px-DOWNLINK_METER6.png||height="365" width="600"]]
364 364  
365 -[[image:image-20220601142805-5.png]]
366 -
367 367  DOWNLINK
368 368  
369 369  
370 -=== **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 ===
371 371  
372 372  (((
373 373  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.
... ... @@ -387,46 +387,36 @@
387 387  
388 388  (((
389 389  check digit: Even
390 -
391 -
392 392  )))
393 393  
394 -[[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"]]
395 395  
396 396  USB
397 397  
398 398  
364 +[[image:https://wiki.dragino.com/images/thumb/6/62/Usb_meter1.jpg/600px-Usb_meter1.jpg||height="728" width="546"]]
399 399  
400 -[[image:image-20220527093747-22.png]]
401 -
402 402  USB
403 403  
404 404  
405 -
406 406  (((
407 407  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.
408 -
409 -
410 410  )))
411 411  
412 412  (((
413 -(% style="color:blue" %)**Example:**  (%%)input：01 03 00 31 00 02 95 c4
374 +**Example:**  input：01 03 00 31 00 02 95 c4
414 414  )))
415 415  
416 416  (((
417 417   output：01 03 04 00 00 00 42 7A 02
418 -
419 -
420 420  )))
421 421  
422 -[[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"]]
423 423  
424 424  USB
425 425  
385 +=== 1.3.5 How to configure multiple devices and modify device addresses ===
426 426  
427 -=== **1.3.5 How to configure multiple devices and modify device addresses** ===
428 -
429 -
430 430  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.
431 431  
432 432  (((
... ... @@ -435,17 +435,14 @@
435 435  )))
436 436  )))
437 437  
438 -[[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"]]
439 439  
397 +**Example**:These two meters are examples of setting parameters and device addresses.
440 440  
441 -(% 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"]]
442 442  
443 -[[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"]]
444 444  
445 -
446 -[[image:image-20220527094028-26.png]]
447 -
448 -
449 449  (((
450 450  (((
451 451  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.
... ... @@ -454,7 +454,7 @@
454 454  
455 455  (((
456 456  (((
457 -We can use **AT+CFGDEV** to set the device address.
411 +We can use AT+CFGDEV to set the device address.
458 458  )))
459 459  )))
460 460  
... ... @@ -464,14 +464,10 @@
464 464  )))
465 465  )))
466 466  
467 -[[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"]]
468 468  
423 +AT+CFGDEV:01 10 00 61 00 01 02 00 02,1
469 469  
470 -(% class="box infomessage" %)
471 -(((
472 -**AT+CFGDEV:01 10 00 61 00 01 02 00 02,1**
473 -)))
474 -
475 475  * 01:device adaress
476 476  
477 477  * 10:function code
... ... @@ -492,64 +492,43 @@
492 492  
493 493  Its default device address is 01, and the following are the parameters for configuring two energy meters.
494 494  
495 -[[image:image-20220601142452-3.png]]
445 +[[image:https://wiki.dragino.com/images/1/13/Meter11.png||alt="Meter11.png" height="576" width="379"]]
496 496  
447 +[[image:https://wiki.dragino.com/images/thumb/7/7e/Meter12.png/600px-Meter12.png||alt="Meter12.png" height="262" width="600"]]
497 497  
498 -[[image:image-20220601142607-4.png]]
449 +PAYLOAD:01 08 DF 43 62
499 499  
500 -
501 -**PAYLOAD:01 08 DF 43 62**
502 -
503 503  * 08 DF is the valid value of the meter with device address 02.
504 504  * 43 62 is the valid value of the meter with device address 01.
505 505  
506 -
507 -
508 -
509 509  == 1.4 Example 4: Circuit Breaker Remote Open Close ==
510 510  
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:
511 511  
512 -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"]]
513 513  
514 -The structure is like below:
515 -
516 -[[image:image-20220527094330-30.png]]
517 -
518 518  Connection
519 519  
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
520 520  
521 -* 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/]]
522 -
523 -
524 -
525 -
526 526  == 1.5 Example 5: SEM Three Energy Meter with RS485-BL or RS485-LN ==
527 527  
528 -
529 529  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:
530 530  
531 -* 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);"]]
532 -* 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
533 533  
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
534 534  
472 +== 1.6 Example 6:CEM C31 485-T1-MID Energy Meter with RS485-LN ==
535 535  
536 -
537 -== 1.6 Example 6: CEM C31 485-T1-MID Energy Meter with RS485-LN ==
538 -
539 -
540 540  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:
541 541  
542 -* 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
543 543  
478 +== 1.7 Example 7:Schneider Electric PLC M221 with RS485-BL ==
544 544  
480 +[[image:https://wiki.dragino.com/images/thumb/9/97/PLC_M221.png/600px-PLC_M221.png||height="353" width="600"]]
545 545  
546 -
547 -== 1.7 Example 7: Schneider Electric PLC M221 with RS485-BL ==
548 -
549 -
550 -[[image:image-20220527094556-31.png]]
551 -
552 552  Network Structure
553 553  
554 -
555 555  * [[Reference Instruction>>url:https://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Schneider%20Electric%20PLC/]]
image-20220527093508-17.png
Author
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1 -XWiki.Xiaoling
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