Last modified by Karry Zhuang on 2024/07/11 11:58
<
From version < 62.1 >
edited by Bei Jinggeng
on 2023/08/08 15:23
To version < 35.3 >
edited by Xiaoling
on 2022/05/27 09:42
>
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Summary

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Author
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1 -XWiki.Bei
1 +XWiki.Xiaoling
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1 -**Table of Contents:**
1 +(% class="wikigeneratedid" %)
2 + **Contents:**
2 2  
3 3  {{toc/}}
4 4  
5 -
6 -
7 -
8 -
9 -
10 10  = 1. Introduction =
11 11  
12 -
13 13  This article provide the examples for RS485-LN to connect to different type of RS485 sensors.
14 14  
15 -
16 16  == 1.1 Example 1: Connect to Leak relay and VFD ==
17 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  
14 +[[image:image-20220527091852-1.png]]
21 21  
22 -[[image:image-20220527091852-1.png||height="547" width="994"]]
16 +Connection
23 23  
24 -**Connection**
25 25  
26 26  
27 -
28 28  [[image:image-20220527091942-2.png]](% style="display:none" %)
29 29  
30 -**Connection**
22 +Connection
31 31  
32 32  
33 -(% style="color:blue" %)**Related documents:**
25 +Related documents:
34 34  
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 -
37 -* 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);"]]
38 -
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.
39 39  * [[Video Demo>>url:https://www.youtube.com/watch?v=TAFZ5eaf-MY&t=6s&ab_channel=XavierFlorensaBerenguer]]
40 40  
41 41  == 1.2 Example 2: Connect to Pulse Counter ==
42 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  
35 +[[image:image-20220527092058-3.png]]
46 46  
47 -[[image:image-20220527092058-3.png||height="552" width="905"]]
37 +Connection
48 48  
49 -**Connection**
50 50  
40 +[[image:image-20220527092146-4.png]]
51 51  
42 +Connection
52 52  
53 -[[image:image-20220527092146-4.png||height="507" width="906"]]
54 -
55 -**Connection**
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/||_mstmutation="1"]]
61 -
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
62 62  * [[Dragino Solution in Farm>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/&file=Dragino%20on%20Farms.pptx]]
63 63  
64 -== 1.3 Example 3: Use RS485-LN with energy meters ==
47 +== ==
65 65  
49 +== 1.3 Example3: Use RS485-LN with energy meters ==
50 +
66 66  === 1.3.1 OverView ===
67 67  
68 -
69 69  (((
70 -(% 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.
71 71  )))
72 72  
73 73  (((
74 74  This example describes a single-phase meter.This is the connection between the RS485-LN and the energy meter.
75 -
76 -
77 77  )))
78 78  
79 79  [[image:image-20220527092419-5.png]]
80 80  
81 -**Connection1**
63 +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  (((
... ... @@ -97,124 +97,114 @@
97 97  )))
98 98  
99 99  (((
100 -Power Source **VIN** to RS485-LN **VIN+**
79 +Power Source VIN to RS485-LN VIN+
101 101  )))
102 102  
103 103  (((
104 -Power Source **GND** to RS485-LN **VIN-**
83 +Power Source GND to RS485-LN VIN-
105 105  )))
106 106  
107 107  (((
108 108  Once there is power, the RS485-LN will be on.
109 -
110 -
111 111  )))
112 112  
113 113  [[image:image-20220527092514-6.png]]
114 114  
115 -**Connection2**
92 +Connection2
116 116  
117 117  
118 -
119 119  [[image:image-20220527092555-7.png]]
120 120  
121 -**Connection3**
97 +Connection3
122 122  
123 123  
124 124  === 1.3.2 How to use the parameters of the energy meter and MODBUS commands ===
125 125  
126 -
127 127  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.
128 128  
129 -[[image:image-20220601143257-10.png]]
104 +[[image:image-20220527092629-8.png]]
130 130  
131 131  
132 -(% 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 +)))
133 133  
134 134  * The first byte : slave address code (=001～247)
135 -
136 136  * The second byte : read register value function code
137 -
138 138  * 3rd and 4th bytes: start address of register to be read
139 -
140 140  * 5th and 6th bytes: Number of registers to read
141 -
142 142  * 7th and 8th bytes: CRC16 checksum from bytes 1 to 6.
143 143  
144 144  (((
145 -
146 -
147 -
148 148  How to parse the reading of the return command of the parameter：
120 +)))
149 149  
150 -(% 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
151 151  )))
152 152  
153 153  * The first byte ARD: slave address code (=001～254)
154 -
155 155  * The second byte: Return to read function code
156 -
157 157  * 3rd byte: total number of bytes
158 -
159 159  * 4th～5th bytes: register data
160 -
161 161  * The 6th and 7th bytes: CRC16 checksum
162 -
163 163  * 08 FD is register data. Use short integer 16 bits to convert to decimal, get 2301, then 230.1V is the voltage.
164 164  
134 +(% class="wikigeneratedid" %)
135 +(((
136 +
137 +)))
138 +
165 165  === 1.3.3 How to configure RS485-LN and parse output commands ===
166 166  
167 -
168 168  RS485-LN provides two configuration methods: AT COMMAND and DOWNLINK.
169 169  
170 170  
171 -==== **1.3.3.1 via AT COMMAND** ====
144 +==== 1.3.3.1 via AT COMMAND: ====
172 172  
146 +First, we can use **AT+CFGDEV** to get the return value, and we can also judge whether the input parameters are correct.
173 173  
174 -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.
175 -
176 176  (((
177 177  If the configured parameters and commands are incorrect, the return value is not obtained.
178 -
179 -
180 180  )))
181 181  
182 -[[image:image-20220601143201-9.png]]
152 +[[image:image-20220527092748-9.png]]
183 183  
184 -**AT COMMAND**
154 +AT COMMAND
185 185  
186 186  
187 187  (% class="box infomessage" %)
188 188  (((
189 - (% _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
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
190 190  )))
191 191  
192 -a:  length for the return of AT+COMMAND
162 +a: length for the return of AT+COMMAND
193 193  
194 -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.
195 195  
196 -c:  define the position for valid value.
166 +c: define the position for valid value.
197 197  
198 -[[image:image-20220601143115-8.png]]
168 +[[image:image-20220527092936-10.png]]
199 199  
200 -**AT COMMAND**
170 +AT COMMAND
201 201  
202 202  
203 -
204 204  PAYLOAD is available after the valid value is intercepted.
205 205  
206 -[[image:image-20220601143046-7.png]]
207 207  
208 -**AT COMMAND**
176 +[[image:image-20220527093059-11.png]]
209 209  
178 +AT COMMAND
210 210  
211 211  
212 212  You can get configured PAYLOAD on TTN.
213 213  
214 -[[image:image-20220601143519-1.png]]
183 +[[image:image-20220527093133-12.png]]
215 215  
216 216  (((
217 -**AT COMMAND**
186 +AT COMMAND
218 218  )))
219 219  
220 220  (((
... ... @@ -222,79 +222,71 @@
222 222  )))
223 223  
224 224  (((
225 -(% style="color:blue" %)**Example**:
226 -
227 -(% 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
228 228  )))
229 229  
230 230  (((
231 -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)
232 232  )))
233 233  
234 234  (((
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.
236 -
237 -
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.
238 238  )))
239 239  
240 240  (((
241 -(% 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
242 242  )))
243 243  
244 244  (((
245 -RETURN2: 01 03 02 08 DC BE 1D(return data)
210 +RETURN2:01 03 02 08 DC BE 1D(return data)
246 246  )))
247 247  
248 248  (((
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.
250 -
251 -
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.
252 252  )))
253 253  
254 254  (((
255 -(% 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
256 256  )))
257 257  
258 258  (((
259 -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)
260 260  )))
261 261  
262 262  (((
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.
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.
264 264  )))
265 265  
266 266  (((
267 -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
268 268  )))
269 269  
270 -[[image:image-20220601142936-6.png]]
233 +[[image:image-20220527093204-13.png]]
271 271  
272 272  AT COMMAND
273 273  
274 274  
238 +(% 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.**
275 275  
276 -(% 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.**
240 +[[image:image-20220527093251-14.png]]
277 277  
278 -
279 -[[image:image-20220601143642-2.png]]
280 -
281 281  AT COMMAND
282 282  
283 283  
245 +==== 1.3.3.2 via LoRaWAN DOWNLINK ====
284 284  
285 -==== **1.3.3.2 via LoRaWAN DOWNLINK** ====
286 -
287 -
288 288  [[image:image-20220527093358-15.png]]
289 289  
290 290  (((
291 -**DOWNLINK**
250 +DOWNLINK
292 292  )))
293 293  
253 +(((
254 +
255 +)))
294 294  
295 -
296 296  (((
297 -(% style="color:blue" %)**Type Code 0xAF**
258 +**Type Code 0xAF**
298 298  )))
299 299  
300 300  (((
... ... @@ -305,7 +305,7 @@
305 305  )))
306 306  
307 307  (((
308 -(% 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.
309 309  )))
310 310  
311 311  (((
... ... @@ -340,47 +340,41 @@
340 340  will execute an uplink after got this command.
341 341  )))
342 342  
343 -
344 344  (((
345 -(% style="color:blue" %)**Example:**
305 +Example:
346 346  )))
347 347  
348 348  (((
349 -**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
350 350  )))
351 351  
352 -[[image:image-20220601144149-6.png]]
312 +[[image:image-20220527093430-16.png]]
353 353  
354 -**DOWNLINK**
314 +DOWNLINK
355 355  
356 356  
317 +[[image:image-20220527093508-17.png]]
357 357  
358 -[[image:image-20220601143803-3.png]]
319 +DOWNLINK
359 359  
360 -**DOWNLINK**
361 361  
322 +[[image:image-20220527093530-18.png]]
362 362  
324 +DOWNLINK
363 363  
364 -[[image:image-20220601144053-5.png]]
365 365  
366 -**DOWNLINK**
327 +[[image:image-20220527093607-19.png]]
367 367  
329 +DOWNLINK
368 368  
369 369  
370 -[[image:image-20220601143921-4.png]]
332 +[[image:image-20220527093628-20.png]]
371 371  
372 -**DOWNLINK**
334 +DOWNLINK
335 +
373 373  
374 -
375 -
376 -[[image:image-20220601142805-5.png]]
377 -
378 -**DOWNLINK**
379 -
380 -
381 381  === 1.3.4 How to configure and output commands for RS485 to USB ===
382 382  
383 -
384 384  (((
385 385  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.
386 386  )))
... ... @@ -399,45 +399,37 @@
399 399  
400 400  (((
401 401  check digit: Even
402 -
403 -
404 404  )))
405 405  
406 406  [[image:image-20220527093708-21.png]]
407 407  
408 -**USB**
361 +USB
409 409  
410 410  
411 -
412 412  [[image:image-20220527093747-22.png]]
413 413  
414 -**USB**
366 +USB
415 415  
416 416  
417 -
418 418  (((
419 419  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.
420 420  )))
421 421  
422 422  (((
423 -(% style="color:blue" %)**Example:**  (%%)input：01 03 00 31 00 02 95 c4
374 +**Example:**  input：01 03 00 31 00 02 95 c4
424 424  )))
425 425  
426 426  (((
427 427   output：01 03 04 00 00 00 42 7A 02
428 -
429 -
430 430  )))
431 431  
432 432  [[image:image-20220527093821-23.png]]
433 433  
434 -**USB**
383 +USB
435 435  
436 436  
437 -
438 438  === 1.3.5 How to configure multiple devices and modify device addresses ===
439 439  
440 -
441 441  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.
442 442  
443 443  (((
... ... @@ -446,18 +446,15 @@
446 446  )))
447 447  )))
448 448  
449 -[[image:image-20220601142044-1.png]]
396 +[[image:image-20220527093849-24.png]]
450 450  
451 451  
452 -(% style="color:blue" %)**Example**(%%): These two meters are examples of setting parameters and device addresses.
399 +**Example**:These two meters are examples of setting parameters and device addresses.
453 453  
454 -
455 455  [[image:image-20220527093950-25.png]]
456 456  
457 -
458 458  [[image:image-20220527094028-26.png]]
459 459  
460 -
461 461  (((
462 462  (((
463 463  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.
... ... @@ -466,7 +466,7 @@
466 466  
467 467  (((
468 468  (((
469 -We can use (% style="color:blue" %)**AT+CFGDEV**(%%) to set the device address.
413 +We can use AT+CFGDEV to set the device address.
470 470  )))
471 471  )))
472 472  
... ... @@ -476,17 +476,16 @@
476 476  )))
477 477  )))
478 478  
479 -[[image:image-20220601142354-2.png]]
423 +[[image:image-20220527094100-27.png]]
480 480  
481 -
482 482  (% class="box infomessage" %)
483 483  (((
484 484  **AT+CFGDEV:01 10 00 61 00 01 02 00 02,1**
485 485  )))
486 486  
487 -* 01: device adaress
430 +* 01:device adaress
488 488  
489 -* 10: function code
432 +* 10:function code
490 490  
491 491  * 00 61：Register address
492 492  
... ... @@ -504,68 +504,45 @@
504 504  
505 505  Its default device address is 01, and the following are the parameters for configuring two energy meters.
506 506  
507 -[[image:image-20220601142452-3.png]]
450 +[[image:image-20220527094150-28.png]]
508 508  
509 509  
510 -[[image:image-20220601142607-4.png]]
453 +[[image:image-20220527094224-29.png]]
511 511  
455 +PAYLOAD:01 08 DF 43 62
512 512  
513 -(% style="color:blue" %)**PAYLOAD: 01 08 DF 43 62**
514 -
515 515  * 08 DF is the valid value of the meter with device address 02.
516 516  * 43 62 is the valid value of the meter with device address 01.
517 517  
518 -(% style="display:none" %) (%%)
519 519  
520 -
521 521  == 1.4 Example 4: Circuit Breaker Remote Open Close ==
522 522  
463 +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:
523 523  
524 -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.
465 +[[image:https://wiki.dragino.com/images/thumb/f/fa/RS485_04_2.png/600px-RS485_04_2.png||height="336" width="600"]]
525 525  
526 -The structure is like below:
467 +Connection
527 527  
528 -[[image:image-20220527094330-30.png]]
469 +* [[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
529 529  
530 -**Connection**
531 -
532 -
533 -* 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"]]
534 -
535 535  == 1.5 Example 5: SEM Three Energy Meter with RS485-BL or RS485-LN ==
536 536  
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-BL to connect to SEM Three Energy Meter and send the data to mobile phone for remote minitor. The structure is like below:
539 539  
540 -* 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);"]]
475 +* [[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
541 541  
542 -* 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"]]
477 +* [[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
543 543  
544 -== 1.6 Example 6: CEM C31 485-T1-MID Energy Meter with RS485-LN ==
479 +== 1.6 Example 6:CEM C31 485-T1-MID Energy Meter with RS485-LN ==
545 545  
546 -
547 547  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:
548 548  
549 -* 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);"]]
483 +* [[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
550 550  
551 -== 1.7 Example 7: Schneider Electric PLC M221 with RS485-BL ==
485 +== 1.7 Example 7:Schneider Electric PLC M221 with RS485-BL ==
552 552  
487 +[[image:https://wiki.dragino.com/images/thumb/9/97/PLC_M221.png/600px-PLC_M221.png||height="353" width="600"]]
553 553  
554 -[[image:image-20220527094556-31.png]]
555 -
556 -
557 557  Network Structure
558 558  
559 559  * [[Reference Instruction>>url:https://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Schneider%20Electric%20PLC/]]
560 -
561 -== 1.8  Example 8: This sketch is supposed to test Dragino RS485-BL (Modbus master), using an Arduino UNO as a Modbus slave. ==
562 -
563 -This sketch uses 4 registers: some of them can be set by Dragino with a command, another is used to store value from a DS18B20 temperature sensor, or a random generated number. All data is 16bit uint, but the sketch shows also how to represent booleans and negative numbers.
564 -
565 -In the next days I will be adding more documentation, but I think it already explains users how to build their own modbus sensor to pair with Dragino RS485-BL.
566 -
567 -This is released the code under GNU LGPL licence on Github:
568 -
569 -[[https:~~/~~/github.com/zorbaproject/ArduinoModbusForDraginoRS485>>url:https://github.com/zorbaproject/ArduinoModbusForDraginoRS485]]
570 -
571 -
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