Last modified by Karry Zhuang on 2024/07/11 11:58
<
From version < 41.15 >
edited by Xiaoling
on 2022/06/01 14:14
To version < 60.12 >
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Summary

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Page properties
Content
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1 -(% class="wikigeneratedid" %)
2 - **Contents:**
1 +**Table of Contents:**
3 3  
4 4  {{toc/}}
5 5  
... ... @@ -8,74 +8,86 @@
8 8  
9 9  
10 10  
11 -= **1. Introduction** =
10 += 1. Introduction =
12 12  
12 +
13 13  This article provide the examples for RS485-LN to connect to different type of RS485 sensors.
14 14  
15 15  
16 -== **1.1 Example 1: Connect to Leak relay and VFD** ==
16 +== 1.1 Example 1: Connect to Leak relay and VFD ==
17 17  
18 +
18 18  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:
19 19  
20 -[[image:image-20220527091852-1.png]]
21 21  
22 -Connection
22 +[[image:image-20220527091852-1.png||height="547" width="994"]]
23 23  
24 +**Connection**
24 24  
25 25  
27 +
26 26  [[image:image-20220527091942-2.png]](% style="display:none" %)
27 27  
28 -Connection
30 +**Connection**
29 29  
30 30  
31 -Related documents:
33 +(% style="color:blue" %)**Related documents:**
32 32  
33 -* [[Solar Pump with Dragino>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Relay_VFD/]] : System Structure
34 -* [[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.
35 +* System Structure:  [[Solar Pump with Dragino>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Relay_VFD/||_mstmutation="1" style="background-color: rgb(255, 255, 255);"]]
36 +* 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/||_mstmutation="1" style="background-color: rgb(255, 255, 255);"]]
35 35  * [[Video Demo>>url:https://www.youtube.com/watch?v=TAFZ5eaf-MY&t=6s&ab_channel=XavierFlorensaBerenguer]]
36 36  
37 37  
38 38  
39 -== **1.2 Example 2: Connect to Pulse Counter** ==
41 +== 1.2 Example 2: Connect to Pulse Counter ==
40 40  
43 +
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 -[[image:image-20220527092058-3.png]]
44 44  
45 -Connection
47 +[[image:image-20220527092058-3.png||height="552" width="905"]]
46 46  
49 +**Connection**
47 47  
48 48  
49 -[[image:image-20220527092146-4.png]]
50 50  
51 -Connection
53 +[[image:image-20220527092146-4.png||height="507" width="906"]]
52 52  
55 +**Connection**
53 53  
54 -* [[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
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/||_mstmutation="1"]]
55 55  * [[Dragino Solution in Farm>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/&file=Dragino%20on%20Farms.pptx]]
56 56  
57 -== ==
58 58  
59 -== **1.3 Example3: Use RS485-LN with energy meters** ==
60 60  
61 -=== **1.3.1 OverView** ===
65 +== 1.3 Example 3: Use RS485-LN with energy meters ==
62 62  
67 +=== 1.3.1 OverView ===
68 +
69 +
63 63  (((
64 -**Note**：The specifications of each energy meter are different, please refer to your own energy meter specifications.
71 +(% style="color:red" %)**Note**：**The specifications of each energy meter are different, please refer to your own energy meter specifications.**
65 65  )))
66 66  
67 67  (((
68 68  This example describes a single-phase meter.This is the connection between the RS485-LN and the energy meter.
76 +
77 +
69 69  )))
70 70  
71 71  [[image:image-20220527092419-5.png]]
72 72  
73 -Connection1
82 +**Connection1**
74 74  
75 75  
76 76  
77 77  (((
78 -How to connect with Energy Meter：
87 +(% style="color:blue" %)**How to connect with Energy Meter：**
88 +
89 +
79 79  )))
80 80  
81 81  (((
... ... @@ -96,30 +96,30 @@
96 96  
97 97  (((
98 98  Once there is power, the RS485-LN will be on.
110 +
111 +
99 99  )))
100 100  
101 101  [[image:image-20220527092514-6.png]]
102 102  
103 -Connection2
116 +**Connection2**
104 104  
105 105  
106 106  
107 107  [[image:image-20220527092555-7.png]]
108 108  
109 -Connection3
122 +**Connection3**
110 110  
111 111  
112 -=== **1.3.2 How to use the parameters of the energy meter and MODBUS commands** ===
125 +=== 1.3.2 How to use the parameters of the energy meter and MODBUS commands ===
113 113  
127 +
114 114  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.
115 115  
116 -[[image:image-20220527092629-8.png]]
130 +[[image:image-20220601143257-10.png]]
117 117  
118 118  
119 -(% class="box infomessage" %)
120 -(((
121 -**Example:** AT+COMMAND1=01 03 00 00 00 01 84 0A
122 -)))
133 +(% style="color:blue" %)**Example:**(%%)  AT+COMMAND1=01 03 00 00 00 01 84 0A
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  (((
142 +
143 +
144 +
131 131  How to parse the reading of the return command of the parameter：
132 -)))
133 133  
134 -(% class="box infomessage" %)
135 -(((
136 -**Example:** RETURN1：01 03 02 08 FD 7E 05
147 +(% style="color:blue" %)**Example:**(%%) RETURN1：01 03 02 08 FD 7E 05
137 137  )))
138 138  
139 139  * The first byte ARD: slave address code (=001～254)
... ... @@ -146,29 +146,35 @@
146 146  (% class="wikigeneratedid" %)
147 147  (((
148 148  
160 +
161 +
149 149  )))
150 150  
151 -=== **1.3.3 How to configure RS485-LN and parse output commands** ===
164 +=== 1.3.3 How to configure RS485-LN and parse output commands ===
152 152  
166 +
153 153  RS485-LN provides two configuration methods: AT COMMAND and DOWNLINK.
154 154  
155 155  
156 -==== **1.3.3.1 via AT COMMAND:** ====
170 +==== 1.3.3.1 via AT COMMAND ====
157 157  
158 -First, we can use **AT+CFGDEV** to get the return value, and we can also judge whether the input parameters are correct.
159 159  
173 +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.
174 +
160 160  (((
161 161  If the configured parameters and commands are incorrect, the return value is not obtained.
177 +
178 +
162 162  )))
163 163  
164 -[[image:image-20220527092748-9.png]]
181 +[[image:image-20220601143201-9.png]]
165 165  
166 -AT COMMAND
183 +**AT COMMAND**
167 167  
168 168  
169 169  (% class="box infomessage" %)
170 170  (((
171 - AT+DATACUTx : This command defines how to handle the return from AT+COMMANDx, max reture length is 40 bytes. AT+DATACUTx=a,b,c
188 + (% _mstmutation="1" %)**AT+DATACUTx **(%%):  This command defines how to handle the return from AT+COMMANDx, max reture length is 40 bytes. AT+DATACUTx=a,b,c
172 172  )))
173 173  
174 174  a:  length for the return of AT+COMMAND
... ... @@ -177,26 +177,26 @@
177 177  
178 178  c:  define the position for valid value.
179 179  
180 -[[image:image-20220527092936-10.png]]
197 +[[image:image-20220601143115-8.png]]
181 181  
182 -AT COMMAND
199 +**AT COMMAND**
183 183  
184 184  
185 185  
186 186  PAYLOAD is available after the valid value is intercepted.
187 187  
205 +[[image:image-20220601143046-7.png]]
188 188  
189 -[[image:image-20220527093059-11.png]]
207 +**AT COMMAND**
190 190  
191 -AT COMMAND
192 192  
193 193  
194 194  You can get configured PAYLOAD on TTN.
195 195  
196 -[[image:image-20220527093133-12.png]]
213 +[[image:image-20220601143519-1.png]]
197 197  
198 198  (((
199 -AT COMMAND
216 +**AT COMMAND**
200 200  )))
201 201  
202 202  (((
... ... @@ -204,69 +204,76 @@
204 204  )))
205 205  
206 206  (((
207 -(% style="color:#4f81bd" %)**Example**:
224 +(% style="color:blue" %)**Example**:
208 208  
209 -CMD1:Read current data with MODBUS command. address:0x03 AT+COMMAND1= 01 03 00 03 00 01,1
226 +
227 +(% style="color:red" %)**CMD1:**(%%) Read current data with MODBUS command. address: 0x03 AT+COMMAND1= 01 03 00 03 00 01,1
210 210  )))
211 211  
212 212  (((
213 -RETURN1:01 03 02 00 02 39 85 00 00(return data)
231 +RETURN1: 01 03 02 00 02 39 85 00 00(return data)
214 214  )))
215 215  
216 216  (((
217 -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.
235 +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.
218 218  
219 219  
220 220  )))
221 221  
222 222  (((
223 -CMD2:Read voltage data with MODBUS command. address:0x00 AT+COMMAND2= 01 03 00 00 00 01,1
241 +(% style="color:red" %)**CMD2: **(%%)Read voltage data with MODBUS command. address: 0x00 AT+COMMAND2= 01 03 00 00 00 01,1
224 224  )))
225 225  
226 226  (((
227 -RETURN2:01 03 02 08 DC BE 1D(return data)
245 +RETURN2: 01 03 02 08 DC BE 1D(return data)
228 228  )))
229 229  
230 230  (((
231 -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.
249 +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.
232 232  
233 233  
234 234  )))
235 235  
236 236  (((
237 -CMD3:Read total active energy data with MODBUS command. address:0x0031 AT+COMMAND3= 01 03 00 31 00 02,1
255 +(% style="color:red" %)**CMD3:**(%%) Read total active energy data with MODBUS command. address: 0x0031 AT+COMMAND3= 01 03 00 31 00 02,1
238 238  )))
239 239  
240 240  (((
241 -RETURN3:01 03 04 00 00 00 44 FA 00(return data)
259 +RETURN3: 01 03 04 00 00 00 44 FA 00(return data)
242 242  )))
243 243  
244 244  (((
245 -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.
263 +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.
246 246  )))
247 247  
248 248  (((
249 -Payload:01 00 02 39 85 08 DC 00 00 00 44
267 +Payload: 01 00 02 39 85 08 DC 00 00 00 44
268 +
269 +
250 250  )))
251 251  
252 -[[image:image-20220527093204-13.png]]
272 +[[image:image-20220601142936-6.png]]
253 253  
254 254  AT COMMAND
255 255  
256 256  
257 -(% 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.**
258 258  
259 -[[image:image-20220527093251-14.png]]
278 +(% style="color:blue" %)**01 is device address,00 02 is the current, 08 DC is the voltage,00 00 00 44 is the total active energy.**
260 260  
280 +
281 +[[image:image-20220601143642-2.png]]
282 +
261 261  AT COMMAND
262 262  
263 263  
264 -==== **1.3.3.2 via LoRaWAN DOWNLINK** ====
265 265  
287 +==== 1.3.3.2 via LoRaWAN DOWNLINK ====
288 +
289 +
266 266  [[image:image-20220527093358-15.png]]
267 267  
268 268  (((
269 -DOWNLINK
293 +**DOWNLINK**
270 270  )))
271 271  
272 272  (((
... ... @@ -274,7 +274,7 @@
274 274  )))
275 275  
276 276  (((
277 -(% style="color:#4f81bd" %)**Type Code 0xAF**
301 +(% style="color:blue" %)**Type Code 0xAF**
278 278  )))
279 279  
280 280  (((
... ... @@ -285,7 +285,9 @@
285 285  )))
286 286  
287 287  (((
288 -Note: if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.
312 +(% style="color:red" %)**Note: if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.**
313 +
314 +
289 289  )))
290 290  
291 291  (((
... ... @@ -321,7 +321,9 @@
321 321  )))
322 322  
323 323  (((
324 -(% style="color:#4f81bd" %)**Example:**
350 +
351 +
352 +(% style="color:blue" %)**Example:**
325 325  )))
326 326  
327 327  (((
... ... @@ -328,33 +328,38 @@
328 328  **AF 03 01 06 0A 05 00 04 00 01 00**: Same as AT+COMMAND3=0A 05 00 04 00 01,1
329 329  )))
330 330  
331 -[[image:image-20220527093430-16.png]]
359 +[[image:image-20220601144149-6.png]]
332 332  
333 -DOWNLINK
361 +**DOWNLINK**
334 334  
335 335  
336 -[[image:image-20220527093508-17.png]]
337 337  
338 -DOWNLINK
365 +[[image:image-20220601143803-3.png]]
339 339  
367 +**DOWNLINK**
340 340  
341 -[[image:image-20220527093530-18.png]]
342 342  
343 -DOWNLINK
344 344  
371 +[[image:image-20220601144053-5.png]]
345 345  
346 -[[image:image-20220527093607-19.png]]
373 +**DOWNLINK**
347 347  
348 -DOWNLINK
349 349  
350 350  
351 -[[image:image-20220527093628-20.png]]
377 +[[image:image-20220601143921-4.png]]
352 352  
353 -DOWNLINK
354 -
379 +**DOWNLINK**
355 355  
356 -=== **1.3.4 How to configure and output commands for RS485 to USB** ===
357 357  
382 +
383 +[[image:image-20220601142805-5.png]]
384 +
385 +**DOWNLINK**
386 +
387 +
388 +=== 1.3.4 How to configure and output commands for RS485 to USB ===
389 +
390 +
358 358  (((
359 359  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.
360 360  )))
... ... @@ -373,37 +373,47 @@
373 373  
374 374  (((
375 375  check digit: Even
409 +
410 +
376 376  )))
377 377  
378 378  [[image:image-20220527093708-21.png]]
379 379  
380 -USB
415 +**USB**
381 381  
382 382  
418 +
383 383  [[image:image-20220527093747-22.png]]
384 384  
385 -USB
421 +**USB**
386 386  
387 387  
424 +
388 388  (((
389 389  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.
427 +
428 +
390 390  )))
391 391  
392 392  (((
393 -(% style="color:#4f81bd" %)**Example:**  (%%)input：01 03 00 31 00 02 95 c4
432 +(% style="color:blue" %)**Example:**  (%%)input：01 03 00 31 00 02 95 c4
394 394  )))
395 395  
396 396  (((
397 397   output：01 03 04 00 00 00 42 7A 02
437 +
438 +
398 398  )))
399 399  
400 400  [[image:image-20220527093821-23.png]]
401 401  
402 -USB
443 +**USB**
403 403  
404 404  
405 -=== **1.3.5 How to configure multiple devices and modify device addresses** ===
406 406  
447 +=== 1.3.5 How to configure multiple devices and modify device addresses ===
448 +
449 +
407 407  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.
408 408  
409 409  (((
... ... @@ -412,15 +412,18 @@
412 412  )))
413 413  )))
414 414  
415 -[[image:image-20220527093849-24.png]]
458 +[[image:image-20220601142044-1.png]]
416 416  
417 417  
418 -**Example**:These two meters are examples of setting parameters and device addresses.
461 +(% style="color:blue" %)**Example**(%%): These two meters are examples of setting parameters and device addresses.
419 419  
463 +
420 420  [[image:image-20220527093950-25.png]]
421 421  
466 +
422 422  [[image:image-20220527094028-26.png]]
423 423  
469 +
424 424  (((
425 425  (((
426 426  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.
... ... @@ -429,7 +429,7 @@
429 429  
430 430  (((
431 431  (((
432 -We can use AT+CFGDEV to set the device address.
478 +We can use (% style="color:blue" %)**AT+CFGDEV**(%%) to set the device address.
433 433  )))
434 434  )))
435 435  
... ... @@ -439,16 +439,17 @@
439 439  )))
440 440  )))
441 441  
442 -[[image:image-20220527094100-27.png]]
488 +[[image:image-20220601142354-2.png]]
443 443  
490 +
444 444  (% class="box infomessage" %)
445 445  (((
446 446  **AT+CFGDEV:01 10 00 61 00 01 02 00 02,1**
447 447  )))
448 448  
449 -* 01:device adaress
496 +* 01: device adaress
450 450  
451 -* 10:function code
498 +* 10: function code
452 452  
453 453  * 00 61：Register address
454 454  
... ... @@ -466,46 +466,62 @@
466 466  
467 467  Its default device address is 01, and the following are the parameters for configuring two energy meters.
468 468  
469 -[[image:image-20220527094150-28.png]]
516 +[[image:image-20220601142452-3.png]]
470 470  
471 471  
472 -[[image:image-20220527094224-29.png]]
519 +[[image:image-20220601142607-4.png]]
473 473  
474 -**PAYLOAD:01 08 DF 43 62**
475 475  
522 +(% style="color:blue" %)**PAYLOAD: 01 08 DF 43 62**
523 +
476 476  * 08 DF is the valid value of the meter with device address 02.
477 477  * 43 62 is the valid value of the meter with device address 01.
478 478  
527 +(% style="display:none" %) (%%)
479 479  
529 +(% style="display:none" %) (%%)
530 +
480 480  == 1.4 Example 4: Circuit Breaker Remote Open Close ==
481 481  
482 -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:
483 483  
534 +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.
535 +
536 +The structure is like below:
537 +
484 484  [[image:image-20220527094330-30.png]]
485 485  
486 486  Connection
487 487  
488 -* [[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
489 489  
543 +* 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/||_mstmutation="1"]]
490 490  
545 +
546 +
491 491  == 1.5 Example 5: SEM Three Energy Meter with RS485-BL or RS485-LN ==
492 492  
549 +
493 493  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:
494 494  
495 -* [[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
552 +* 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||_mstmutation="1" style="background-color: rgb(255, 255, 255);"]]
553 +* 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||_mstmutation="1"]]
496 496  
497 -* [[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
498 498  
499 -== 1.6 Example 6:CEM C31 485-T1-MID Energy Meter with RS485-LN ==
500 500  
557 +== 1.6 Example 6: CEM C31 485-T1-MID Energy Meter with RS485-LN ==
558 +
559 +
501 501  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:
502 502  
503 -* [[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
562 +* 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||_mstmutation="1" style="background-color: rgb(255, 255, 255);"]]
504 504  
505 -== 1.7 Example 7:Schneider Electric PLC M221 with RS485-BL ==
506 506  
565 +
566 +== 1.7 Example 7: Schneider Electric PLC M221 with RS485-BL ==
567 +
568 +
507 507  [[image:image-20220527094556-31.png]]
508 508  
509 509  Network Structure
510 510  
573 +
511 511  * [[Reference Instruction>>url:https://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Schneider%20Electric%20PLC/]]
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