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From version 57.7
edited by Xiaoling
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edited by Xiaoling
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Summary

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Content
... ... @@ -1,35 +1,19 @@
1 -(% class="wikigeneratedid" %)
2 - ** Table of** **Contents:**
1 += 1. Introduction =
3 3  
4 -{{toc/}}
5 -
6 -
7 -
8 -
9 -
10 -
11 -= **1. Introduction** =
12 -
13 -
14 14  This article provide the examples for RS485-LN to connect to different type of RS485 sensors.
15 15  
5 +== 1.1 Example 1: Connect to Leak relay and VFD ==
16 16  
17 -== **1.1 Example 1: Connect to Leak relay and VFD** ==
18 -
19 -
20 20  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:
21 21  
22 -[[image:image-20220527091852-1.png]]
9 +[[image:https://wiki.dragino.com/images/thumb/5/5c/RS485_01.png/600px-RS485_01.png||height="297" width="534"]]
23 23  
24 24  Connection
25 25  
13 +[[image:https://wiki.dragino.com/images/thumb/f/f2/RS485_02.png/600px-RS485_02.png||height="743" width="528"]](% style="display:none" %)
26 26  
27 -
28 -[[image:image-20220527091942-2.png]](% style="display:none" %)
29 -
30 30  Connection
31 31  
32 -
33 33  Related documents:
34 34  
35 35  * [[Solar Pump with Dragino>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Relay_VFD/]] : System Structure
... ... @@ -37,35 +37,26 @@
37 37  * [[Video Demo>>url:https://www.youtube.com/watch?v=TAFZ5eaf-MY&t=6s&ab_channel=XavierFlorensaBerenguer]]
38 38  
39 39  
24 +== 1.2 Example 2: Connect to Pulse Counter ==
40 40  
41 -
42 -== **1.2 Example 2: Connect to Pulse Counter** ==
43 -
44 -
45 45  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:
46 46  
28 +[[image:https://wiki.dragino.com/images/thumb/3/34/RS485_02_1.png/600px-RS485_02_1.png||height="364" width="600"]]
47 47  
48 -[[image:image-20220527092058-3.png]]
49 -
50 50  Connection
51 51  
32 +[[image:https://wiki.dragino.com/images/thumb/5/5f/RS485_02_2.png/600px-RS485_02_2.png||height="337" width="600"]]
52 52  
53 -
54 -[[image:image-20220527092146-4.png]]
55 -
56 56  Connection
57 57  
58 -
59 -* 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/]]
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
60 60  * [[Dragino Solution in Farm>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/&file=Dragino%20on%20Farms.pptx]]
61 61  
62 62  
40 +== 1.3 Example3: Use RS485-LN with energy meters ==
63 63  
42 +=== 1.3.1 OverView ===
64 64  
65 -== **1.3 Example3: Use RS485-LN with energy meters** ==
66 -
67 -=== **1.3.1 OverView** ===
68 -
69 69  (((
70 70  **Note**：The specifications of each energy meter are different, please refer to your own energy meter specifications.
71 71  )))
... ... @@ -74,57 +74,40 @@
74 74  This example describes a single-phase meter.This is the connection between the RS485-LN and the energy meter.
75 75  )))
76 76  
77 -[[image:image-20220527092419-5.png]]
52 +[[image:https://wiki.dragino.com/images/thumb/f/f4/Meter1.jpg/600px-Meter1.jpg||height="800" width="600"]]
78 78  
79 79  Connection1
80 80  
81 -
82 -
83 -(((
84 84  How to connect with Energy Meter：
85 -)))
86 86  
87 -(((
88 88  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.
89 -)))
90 90  
91 -(((
92 92  The RS485-LN can be powered by 7 ~~ 24V DC power source. Connection as below
93 -)))
94 94  
95 -(((
96 96  Power Source VIN to RS485-LN VIN+
97 -)))
98 98  
99 -(((
100 100  Power Source GND to RS485-LN VIN-
101 -)))
102 102  
103 -(((
104 104  Once there is power, the RS485-LN will be on.
105 -)))
106 106  
107 -[[image:image-20220527092514-6.png]]
68 +[[image:https://wiki.dragino.com/images/thumb/1/15/Meter2.jpg/600px-Meter2.jpg||height="450" width="600"]]
108 108  
109 109  Connection2
110 110  
72 +[[image:https://wiki.dragino.com/images/thumb/a/a5/Meter3.jpg/600px-Meter3.jpg||height="800" width="600"]]
111 111  
112 -
113 -[[image:image-20220527092555-7.png]]
114 -
115 115  Connection3
116 116  
117 117  
118 -=== **1.3.2 How to use the parameters of the energy meter and MODBUS commands** ===
77 +=== 1.3.2 How to use the parameters of the energy meter and MODBUS commands ===
119 119  
120 120  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.
121 121  
122 -[[image:image-20220601143257-10.png]]
81 +[[image:https://wiki.dragino.com/images/thumb/3/35/Meter4.png/600px-Meter4.png||alt="Meter4.png" height="193" width="600"]]
123 123  
124 -
125 125  (% class="box infomessage" %)
126 126  (((
127 -**Example:** AT+COMMAND1=01 03 00 00 00 01 84 0A
85 +Example:AT+COMMAND1=01 03 00 00 00 01 84 0A
128 128  )))
129 129  
130 130  * The first byte : slave address code (=001～247)
... ... @@ -133,13 +133,11 @@
133 133  * 5th and 6th bytes: Number of registers to read
134 134  * 7th and 8th bytes: CRC16 checksum from bytes 1 to 6.
135 135  
136 -(((
137 137  How to parse the reading of the return command of the parameter：
138 -)))
139 139  
140 140  (% class="box infomessage" %)
141 141  (((
142 -**Example:** RETURN1：01 03 02 08 FD 7E 05
98 +Example:RETURN1：01 03 02 08 FD 7E 05
143 143  )))
144 144  
145 145  * The first byte ARD: slave address code (=001～254)
... ... @@ -149,18 +149,13 @@
149 149  * The 6th and 7th bytes: CRC16 checksum
150 150  * 08 FD is register data. Use short integer 16 bits to convert to decimal, get 2301, then 230.1V is the voltage.
151 151  
152 -(% class="wikigeneratedid" %)
153 -(((
154 -
155 -)))
156 156  
157 -=== **1.3.3 How to configure RS485-LN and parse output commands** ===
109 +=== 1.3.3 How to configure RS485-LN and parse output commands ===
158 158  
159 159  RS485-LN provides two configuration methods: AT COMMAND and DOWNLINK.
160 160  
113 +==== 1.3.3.1 via AT COMMAND: ====
161 161  
162 -==== **1.3.3.1 via AT COMMAND:** ====
163 -
164 164  First, we can use **AT+CFGDEV** to get the return value, and we can also judge whether the input parameters are correct.
165 165  
166 166  (((
... ... @@ -167,302 +167,181 @@
167 167  If the configured parameters and commands are incorrect, the return value is not obtained.
168 168  )))
169 169  
170 -[[image:image-20220601143201-9.png]]
121 +[[image:https://wiki.dragino.com/images/b/bc/AT_COMMAND1.png||height="358" width="456"]]
171 171  
172 -AT COMMAND
123 +**AT COMMAND**
173 173  
174 -
175 175  (% class="box infomessage" %)
176 176  (((
177 - AT+DATACUTx : This command defines how to handle the return from AT+COMMANDx, max reture length is 40 bytes. AT+DATACUTx=a,b,c
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
178 178  )))
179 179  
180 -a:  length for the return of AT+COMMAND
130 +a: length for the return of AT+COMMAND
181 181  
182 -b: 1: grab valid value by byte, max 6 bytes;  2: grab valid value by bytes section, max 3 sections.
132 +b:1: grab valid value by byte, max 6 bytes. 2: grab valid value by bytes section, max 3 sections.
183 183  
184 -c:  define the position for valid value.
134 +c: define the position for valid value.
185 185  
186 -[[image:image-20220601143115-8.png]]
136 +[[image:https://wiki.dragino.com/images/7/7d/AT_COMMAND2.png||height="278" width="477"]]
187 187  
188 188  AT COMMAND
189 189  
190 -
191 -
192 192  PAYLOAD is available after the valid value is intercepted.
193 193  
194 194  
195 -[[image:image-20220601143046-7.png]]
143 +[[image:https://wiki.dragino.com/images/3/3a/AT_COMMAND4.png||height="219" width="576"]]
196 196  
197 197  AT COMMAND
198 198  
199 -
200 -
201 201  You can get configured PAYLOAD on TTN.
202 202  
203 -[[image:image-20220601143519-1.png]]
204 204  
205 -(((
150 +[[image:https://wiki.dragino.com/images/thumb/c/c2/AT_COMMAND3.png/600px-AT_COMMAND3.png||height="138" width="600"]]
151 +
206 206  AT COMMAND
207 -)))
208 208  
209 -(((
210 -
211 -)))
154 +**Example**: CMD1:Read current data with MODBUS command. address:0x03 AT+COMMAND1= 01 03 00 03 00 01,1
212 212  
213 -(((
214 -(% style="color:#4f81bd" %)**Example**:
215 -
216 -CMD1:Read current data with MODBUS command. address:0x03 AT+COMMAND1= 01 03 00 03 00 01,1
217 -)))
218 -
219 -(((
220 220  RETURN1:01 03 02 00 02 39 85 00 00(return data)
221 -)))
222 222  
223 -(((
224 224  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.
225 225  
226 -
227 -)))
228 -
229 -(((
230 230  CMD2:Read voltage data with MODBUS command. address:0x00 AT+COMMAND2= 01 03 00 00 00 01,1
231 -)))
232 232  
233 -(((
234 234  RETURN2:01 03 02 08 DC BE 1D(return data)
235 -)))
236 236  
237 -(((
238 238  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.
239 239  
240 -
241 -)))
242 -
243 -(((
244 244  CMD3:Read total active energy data with MODBUS command. address:0x0031 AT+COMMAND3= 01 03 00 31 00 02,1
245 -)))
246 246  
247 -(((
248 248  RETURN3:01 03 04 00 00 00 44 FA 00(return data)
249 -)))
250 250  
251 -(((
252 252  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.
253 -)))
254 254  
255 -(((
256 256  Payload:01 00 02 39 85 08 DC 00 00 00 44
257 -)))
258 258  
259 -[[image:image-20220601142936-6.png]]
174 +[[image:https://wiki.dragino.com/images/thumb/9/9b/AT_COMMAND10.png/600px-AT_COMMAND10.png||height="278" width="600"]]
260 260  
261 261  AT COMMAND
262 262  
178 +01 is device address,00 02 is the current, 08 DC is the voltage,00 00 00 44 is the total active energy.
263 263  
264 -(% 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.**
265 265  
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]]
266 266  
267 -
268 -[[image:image-20220601143642-2.png]]
269 -
270 270  AT COMMAND
271 271  
272 272  
273 -==== **1.3.3.2 via LoRaWAN DOWNLINK** ====
186 +==== 1.3.3.2 via LoRaWAN DOWNLINK ====
274 274  
275 -[[image:image-20220527093358-15.png]]
188 +[[image:https://wiki.dragino.com/images/thumb/f/fc/DOWNLINK_METER1.png/600px-DOWNLINK_METER1.png||height="423" width="600"]]
276 276  
277 -(((
278 278  DOWNLINK
279 -)))
280 280  
281 -(((
282 -
283 -)))
192 +Type Code 0xAF
284 284  
285 -(((
286 -(% style="color:#4f81bd" %)**Type Code 0xAF**
287 -)))
288 -
289 -(((
290 -(% class="box infomessage" %)
291 -(((
292 292  0xAF downlink command can be used to set AT+COMMANDx or AT+DATACUTx.
293 -)))
294 -)))
295 295  
296 -(((
297 297  Note: if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.
298 -)))
299 299  
300 -(((
301 301  Format: AF MM NN LL XX XX XX XX YY
302 -)))
303 303  
304 -(((
305 305  Where:
306 -)))
307 307  
308 -(((
309 309  MM: the ATCOMMAND or AT+DATACUT to be set. Value from 01 ~~ 0F,
310 -)))
311 311  
312 -(((
313 313  NN: 0: no CRC; 1: add CRC-16/MODBUS ; 2: set the AT+DATACUT value.
314 -)))
315 315  
316 -(((
317 317  LL: The length of AT+COMMAND or AT+DATACUT command
318 -)))
319 319  
320 -(((
321 321  XX XX XX XX: AT+COMMAND or AT+DATACUT command
322 -)))
323 323  
324 -(((
325 325  YY: If YY=0, RS485-LN will execute the downlink command without uplink; if YY=1, RS485-LN
326 -)))
327 327  
328 -(((
329 329  will execute an uplink after got this command.
330 -)))
331 331  
332 -(((
333 -
214 +Example:
334 334  
335 -(% style="color:#4f81bd" %)**Example:**
336 -)))
216 +AF 03 01 06 0A 05 00 04 00 01 00: Same as AT+COMMAND3=0A 05 00 04 00 01,1
337 337  
338 -(((
339 -**AF 03 01 06 0A 05 00 04 00 01 00**: Same as AT+COMMAND3=0A 05 00 04 00 01,1
340 -)))
218 +[[image:https://wiki.dragino.com/images/thumb/4/45/DOWNLINK_METER2.png/600px-DOWNLINK_METER2.png||height="208" width="600"]]
341 341  
342 -[[image:image-20220601144149-6.png]]
343 -
344 344  DOWNLINK
345 345  
346 346  
223 +[[~[~[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]]
347 347  
348 -[[image:image-20220601143803-3.png]]
349 -
350 350  DOWNLINK
351 351  
352 352  
228 +[[image:https://wiki.dragino.com/images/thumb/2/27/DOWNLINK_METER4.png/600px-DOWNLINK_METER4.png||height="210" width="600"]]
353 353  
354 -[[image:image-20220601144053-5.png]]
355 -
356 356  DOWNLINK
357 357  
358 358  
233 +[[~[~[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]]
359 359  
360 -[[image:image-20220601143921-4.png]]
361 -
362 362  DOWNLINK
363 363  
237 +[[image:https://wiki.dragino.com/images/thumb/a/a2/DOWNLINK_METER6.png/600px-DOWNLINK_METER6.png||height="365" width="600"]]
364 364  
365 -
366 -[[image:image-20220601142805-5.png]]
367 -
368 368  DOWNLINK
369 369  
370 370  
371 -=== **1.3.4 How to configure and output commands for RS485 to USB** ===
242 +=== 1.3.4 How to configure and output commands for RS485 to USB ===
372 372  
373 -(((
374 374  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.
375 -)))
376 376  
377 -(((
378 378  First, connect the A+ and A- of the USB to the 485 A and 485 B of the energy meter.
379 -)))
380 380  
381 -(((
382 382  Open the serial port debugging, set the send and receive to HEX.
383 -)))
384 384  
385 -(((
386 386  Baud rate: 9600
387 -)))
388 388  
389 -(((
390 390  check digit: Even
391 -)))
392 392  
393 -[[image:image-20220527093708-21.png]]
254 +[[image:https://wiki.dragino.com/images/thumb/8/8f/Usb_meter2.jpg/600px-Usb_meter2.jpg||height="800" width="600"]]
394 394  
395 395  USB
396 396  
258 +[[image:https://wiki.dragino.com/images/thumb/6/62/Usb_meter1.jpg/600px-Usb_meter1.jpg||height="800" width="600"]]
397 397  
398 -
399 -[[image:image-20220527093747-22.png]]
400 -
401 401  USB
402 402  
403 -
404 -
405 -(((
406 406  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.
407 -)))
408 408  
409 -(((
410 -(% style="color:#4f81bd" %)**Example:**  (%%)input：01 03 00 31 00 02 95 c4
411 -)))
264 +Example:input：01 03 00 31 00 02 95 c4
412 412  
413 -(((
414 - output：01 03 04 00 00 00 42 7A 02
415 -)))
266 +{{{ output:01 03 04 00 00 00 42 7A 02
267 +}}}
416 416  
417 -[[image:image-20220527093821-23.png]]
269 +[[image:https://wiki.dragino.com/images/thumb/b/b3/Usb_meter3.jpg/600px-Usb_meter3.jpg||height="466" width="600"]]
418 418  
419 419  USB
420 420  
273 +=== 1.3.5 How to configure multiple devices and modify device addresses ===
421 421  
422 -=== **1.3.5 How to configure multiple devices and modify device addresses** ===
423 -
424 424  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.
425 425  
426 -(((
427 -(((
428 428  Set the device address according to the parameters in the appendix of the MODBUS communication protocol.
429 -)))
430 -)))
431 431  
432 -[[image:image-20220601142044-1.png]]
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"]]
433 433  
281 +Example:These two meters are examples of setting parameters and device addresses.
434 434  
435 -**Example**:These two meters are examples of setting parameters and device addresses.
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"]]
436 436  
437 -[[image:image-20220527093950-25.png]]
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"]]
438 438  
439 -
440 -[[image:image-20220527094028-26.png]]
441 -
442 -(((
443 -(((
444 444  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.
445 -)))
446 -)))
447 447  
448 -(((
449 -(((
450 450  We can use AT+CFGDEV to set the device address.
451 -)))
452 -)))
453 453  
454 -(((
455 -(((
456 456  We modify the device address 01 of the first energy meter to 02.
457 -)))
458 -)))
459 459  
460 -[[image:image-20220601142354-2.png]]
293 +[[image:https://wiki.dragino.com/images/6/6b/Double_meter4.png||alt="Double meter4.png" height="141" width="456"]]
461 461  
462 -(% class="box infomessage" %)
463 -(((
464 -**AT+CFGDEV:01 10 00 61 00 01 02 00 02,1**
465 -)))
295 +AT+CFGDEV:01 10 00 61 00 01 02 00 02,1
466 466  
467 467  * 01:device adaress
468 468  
... ... @@ -484,13 +484,12 @@
484 484  
485 485  Its default device address is 01, and the following are the parameters for configuring two energy meters.
486 486  
487 -[[image:image-20220601142452-3.png]]
317 +[[image:https://wiki.dragino.com/images/1/13/Meter11.png||alt="Meter11.png" height="576" width="379"]]
488 488  
319 +[[image:https://wiki.dragino.com/images/thumb/7/7e/Meter12.png/600px-Meter12.png||alt="Meter12.png" height="262" width="600"]]
489 489  
490 -[[image:image-20220601142607-4.png]]
321 +PAYLOAD:01 08 DF 43 62
491 491  
492 -**PAYLOAD:01 08 DF 43 62**
493 -
494 494  * 08 DF is the valid value of the meter with device address 02.
495 495  * 43 62 is the valid value of the meter with device address 01.
496 496  
... ... @@ -499,12 +499,13 @@
499 499  
500 500  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:
501 501  
502 -[[image:image-20220527094330-30.png]]
331 +[[image:https://wiki.dragino.com/images/thumb/f/fa/RS485_04_2.png/600px-RS485_04_2.png||height="336" width="600"]]
503 503  
504 504  Connection
505 505  
506 506  * [[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
507 507  
337 +
508 508  == 1.5 Example 5: SEM Three Energy Meter with RS485-BL or RS485-LN ==
509 509  
510 510  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:
... ... @@ -513,6 +513,7 @@
513 513  
514 514  * [[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
515 515  
346 +
516 516  == 1.6 Example 6:CEM C31 485-T1-MID Energy Meter with RS485-LN ==
517 517  
518 518  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:
... ... @@ -519,9 +519,10 @@
519 519  
520 520  * [[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
521 521  
353 +
522 522  == 1.7 Example 7:Schneider Electric PLC M221 with RS485-BL ==
523 523  
524 -[[image:image-20220527094556-31.png]]
356 +[[image:https://wiki.dragino.com/images/thumb/9/97/PLC_M221.png/600px-PLC_M221.png||height="353" width="600"]]
525 525  
526 526  Network Structure
527 527  
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