Last modified by Karry Zhuang on 2024/07/11 11:58
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edited by Xiaoling
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To version < 79.2 >
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1 -XWiki.Xiaoling
1 +XWiki.karry
Content
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7 7  
8 8  
9 9  
10 -= **1. Introduction** =
10 += 1. Introduction =
11 11  
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 16  
17 -== **1.1 Example 1: Connect to Leak relay and VFD** ==
18 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 22  
23 -[[image:image-20220527091852-1.png]]
22 +[[image:image-20220527091852-1.png||height="547" width="994"]]
24 24  
25 -Connection
24 +**Connection**
26 26  
27 27  
28 -
29 29  [[image:image-20220527091942-2.png]](% style="display:none" %)
30 30  
31 -Connection
29 +**Connection**
32 32  
33 33  
34 34  (% style="color:blue" %)**Related documents:**
35 35  
36 -* 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);"]]
34 +* 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);"]]
35 +
37 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);"]]
37 +
38 38  * [[Video Demo>>url:https://www.youtube.com/watch?v=TAFZ5eaf-MY&t=6s&ab_channel=XavierFlorensaBerenguer]]
39 39  
40 40  
41 +== 1.2 Example 2: Connect to Pulse Counter ==
41 41  
42 -== **1.2 Example 2: Connect to Pulse Counter** ==
43 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  
47 47  
48 -[[image:image-20220527092058-3.png]]
47 +[[image:image-20220527092058-3.png||height="552" width="905"]]
49 49  
50 -Connection
49 +**Connection**
51 51  
52 52  
52 +[[image:image-20220527092146-4.png||height="507" width="906"]]
53 53  
54 -[[image:image-20220527092146-4.png]]
54 +**Connection**
55 55  
56 -Connection
57 57  
58 -
59 59  (% style="color:blue" %)**Related documents:**
60 60  
61 61  * 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"]]
60 +
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 64  
64 +== 1.3 Example 3: Use RS485-LN with energy meters ==
65 65  
66 -== **1.3 Example3: Use RS485-LN with energy meters** ==
66 +=== 1.3.1 OverView ===
67 67  
68 68  
69 -=== **1.3.1 OverView** ===
70 -
71 -
72 72  (((
73 73  (% style="color:red" %)**Note**：**The specifications of each energy meter are different, please refer to your own energy meter specifications.**
74 74  )))
... ... @@ -75,16 +75,13 @@
75 75  
76 76  (((
77 77  This example describes a single-phase meter.This is the connection between the RS485-LN and the energy meter.
78 -
79 -
80 80  )))
81 81  
82 82  [[image:image-20220527092419-5.png]]
83 83  
84 -Connection1
79 +**Connection1**
85 85  
86 86  
87 -
88 88  (((
89 89  (% style="color:blue" %)**How to connect with Energy Meter：**
90 90  
... ... @@ -100,34 +100,30 @@
100 100  )))
101 101  
102 102  (((
103 -Power Source VIN to RS485-LN VIN+
97 +Power Source **VIN** to RS485-LN **VIN+**
104 104  )))
105 105  
106 106  (((
107 -Power Source GND to RS485-LN VIN-
101 +Power Source **GND** to RS485-LN **VIN-**
108 108  )))
109 109  
110 110  (((
111 111  Once there is power, the RS485-LN will be on.
112 -
113 -
114 114  )))
115 115  
116 116  [[image:image-20220527092514-6.png]]
117 117  
118 -Connection2
110 +**Connection2**
119 119  
120 120  
121 -
122 122  [[image:image-20220527092555-7.png]]
123 123  
124 -Connection3
115 +**Connection3**
125 125  
126 126  
118 +=== 1.3.2 How to use the parameters of the energy meter and MODBUS commands ===
127 127  
128 -=== **1.3.2 How to use the parameters of the energy meter and MODBUS commands** ===
129 129  
130 -
131 131  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.
132 132  
133 133  [[image:image-20220601143257-10.png]]
... ... @@ -136,9 +136,13 @@
136 136  (% style="color:blue" %)**Example:**(%%)  AT+COMMAND1=01 03 00 00 00 01 84 0A
137 137  
138 138  * The first byte : slave address code (=001～247)
129 +
139 139  * The second byte : read register value function code
131 +
140 140  * 3rd and 4th bytes: start address of register to be read
133 +
141 141  * 5th and 6th bytes: Number of registers to read
135 +
142 142  * 7th and 8th bytes: CRC16 checksum from bytes 1 to 6.
143 143  
144 144  (((
... ... @@ -151,27 +151,24 @@
151 151  )))
152 152  
153 153  * The first byte ARD: slave address code (=001～254)
148 +
154 154  * The second byte: Return to read function code
150 +
155 155  * 3rd byte: total number of bytes
152 +
156 156  * 4th～5th bytes: register data
154 +
157 157  * The 6th and 7th bytes: CRC16 checksum
156 +
158 158  * 08 FD is register data. Use short integer 16 bits to convert to decimal, get 2301, then 230.1V is the voltage.
159 159  
160 -(% class="wikigeneratedid" %)
161 -(((
162 -
163 163  
160 +=== 1.3.3 How to configure RS485-LN and parse output commands ===
164 164  
165 -
166 -)))
167 167  
168 -=== **1.3.3 How to configure RS485-LN and parse output commands** ===
169 -
170 -
171 171  RS485-LN provides two configuration methods: AT COMMAND and DOWNLINK.
172 172  
173 173  
174 -
175 175  ==== **1.3.3.1 via AT COMMAND** ====
176 176  
177 177  
... ... @@ -185,7 +185,7 @@
185 185  
186 186  [[image:image-20220601143201-9.png]]
187 187  
188 -AT COMMAND
179 +**AT COMMAND**
189 189  
190 190  
191 191  (% class="box infomessage" %)
... ... @@ -201,37 +201,31 @@
201 201  
202 202  [[image:image-20220601143115-8.png]]
203 203  
204 -AT COMMAND
195 +**AT COMMAND**
205 205  
206 206  
207 -
208 208  PAYLOAD is available after the valid value is intercepted.
209 209  
210 -
211 211  [[image:image-20220601143046-7.png]]
212 212  
213 -AT COMMAND
202 +**AT COMMAND**
214 214  
215 215  
216 -
217 217  You can get configured PAYLOAD on TTN.
218 218  
219 219  [[image:image-20220601143519-1.png]]
220 220  
221 221  (((
222 -AT COMMAND
210 +**AT COMMAND**
223 223  )))
224 224  
225 225  (((
226 226  
227 -
228 -
229 229  )))
230 230  
231 231  (((
232 232  (% style="color:blue" %)**Example**:
233 233  
234 -
235 235  (% style="color:red" %)**CMD1:**(%%) Read current data with MODBUS command. address: 0x03 AT+COMMAND1= 01 03 00 03 00 01,1
236 236  )))
237 237  
... ... @@ -273,8 +273,6 @@
273 273  
274 274  (((
275 275  Payload: 01 00 02 39 85 08 DC 00 00 00 44
276 -
277 -
278 278  )))
279 279  
280 280  [[image:image-20220601142936-6.png]]
... ... @@ -282,7 +282,6 @@
282 282  AT COMMAND
283 283  
284 284  
285 -
286 286  (% 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.**
287 287  
288 288  
... ... @@ -291,7 +291,6 @@
291 291  AT COMMAND
292 292  
293 293  
294 -
295 295  ==== **1.3.3.2 via LoRaWAN DOWNLINK** ====
296 296  
297 297  
... ... @@ -298,15 +298,12 @@
298 298  [[image:image-20220527093358-15.png]]
299 299  
300 300  (((
301 -DOWNLINK
282 +**DOWNLINK**
302 302  )))
303 303  
304 -(((
305 -
306 -)))
307 307  
308 308  (((
309 -(% style="color:#4f81bd" %)**Type Code 0xAF**
287 +(% style="color:blue" %)**Type Code 0xAF**
310 310  )))
311 311  
312 312  (((
... ... @@ -318,8 +318,6 @@
318 318  
319 319  (((
320 320  (% style="color:red" %)**Note: if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.**
321 -
322 -
323 323  )))
324 324  
325 325  (((
... ... @@ -354,9 +354,8 @@
354 354  will execute an uplink after got this command.
355 355  )))
356 356  
357 -(((
358 -
359 359  
334 +(((
360 360  (% style="color:blue" %)**Example:**
361 361  )))
362 362  
... ... @@ -366,35 +366,30 @@
366 366  
367 367  [[image:image-20220601144149-6.png]]
368 368  
369 -DOWNLINK
344 +**DOWNLINK**
370 370  
371 371  
372 -
373 373  [[image:image-20220601143803-3.png]]
374 374  
375 -DOWNLINK
349 +**DOWNLINK**
376 376  
377 377  
378 -
379 379  [[image:image-20220601144053-5.png]]
380 380  
381 -DOWNLINK
354 +**DOWNLINK**
382 382  
383 383  
384 -
385 385  [[image:image-20220601143921-4.png]]
386 386  
387 -DOWNLINK
359 +**DOWNLINK**
388 388  
389 389  
390 -
391 391  [[image:image-20220601142805-5.png]]
392 392  
393 -DOWNLINK
394 -
364 +**DOWNLINK**
395 395  
396 396  
397 -=== **1.3.4 How to configure and output commands for RS485 to USB** ===
367 +=== 1.3.4 How to configure and output commands for RS485 to USB ===
398 398  
399 399  
400 400  (((
... ... @@ -415,26 +415,21 @@
415 415  
416 416  (((
417 417  check digit: Even
418 -
419 -
420 420  )))
421 421  
422 422  [[image:image-20220527093708-21.png]]
423 423  
424 -USB
392 +**USB**
425 425  
426 426  
427 -
428 428  [[image:image-20220527093747-22.png]]
429 429  
430 -USB
397 +**USB**
431 431  
432 432  
433 433  
434 434  (((
435 435  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.
436 -
437 -
438 438  )))
439 439  
440 440  (((
... ... @@ -449,13 +449,12 @@
449 449  
450 450  [[image:image-20220527093821-23.png]]
451 451  
452 -USB
417 +**USB**
453 453  
454 454  
420 +=== 1.3.5 How to configure multiple devices and modify device addresses ===
455 455  
456 -=== **1.3.5 How to configure multiple devices and modify device addresses** ===
457 457  
458 -
459 459  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.
460 460  
461 461  (((
... ... @@ -469,6 +469,7 @@
469 469  
470 470  (% style="color:blue" %)**Example**(%%): These two meters are examples of setting parameters and device addresses.
471 471  
436 +
472 472  [[image:image-20220527093950-25.png]]
473 473  
474 474  
... ... @@ -501,9 +501,9 @@
501 501  **AT+CFGDEV:01 10 00 61 00 01 02 00 02,1**
502 502  )))
503 503  
504 -* 01:device adaress
469 +* 01: device adaress
505 505  
506 -* 10:function code
471 +* 10: function code
507 507  
508 508  * 00 61：Register address
509 509  
... ... @@ -532,6 +532,9 @@
532 532  * 08 DF is the valid value of the meter with device address 02.
533 533  * 43 62 is the valid value of the meter with device address 01.
534 534  
500 +(% style="display:none" %) (%%)
501 +
502 +
535 535  == 1.4 Example 4: Circuit Breaker Remote Open Close ==
536 536  
537 537  
... ... @@ -541,11 +541,12 @@
541 541  
542 542  [[image:image-20220527094330-30.png]]
543 543  
544 -Connection
512 +**Connection**
545 545  
546 546  
547 547  * 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"]]
548 548  
517 +
549 549  == 1.5 Example 5: SEM Three Energy Meter with RS485-BL or RS485-LN ==
550 550  
551 551  
... ... @@ -552,8 +552,10 @@
552 552  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:
553 553  
554 554  * 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);"]]
524 +
555 555  * 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"]]
556 556  
527 +
557 557  == 1.6 Example 6: CEM C31 485-T1-MID Energy Meter with RS485-LN ==
558 558  
559 559  
... ... @@ -561,12 +561,119 @@
561 561  
562 562  * 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);"]]
563 563  
535 +
564 564  == 1.7 Example 7: Schneider Electric PLC M221 with RS485-BL ==
565 565  
566 566  
567 567  [[image:image-20220527094556-31.png]]
568 568  
541 +
569 569  Network Structure
570 570  
571 -
572 572  * [[Reference Instruction>>url:https://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Schneider%20Electric%20PLC/]]
545 +
546 +
547 +== 1.8 Example 8: This sketch is supposed to test Dragino RS485-BL (Modbus master), using an Arduino UNO as a Modbus slave. ==
548 +
549 +
550 +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.
551 +
552 +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.
553 +
554 +This is released the code under GNU LGPL licence on Github:
555 +
556 +[[https:~~/~~/github.com/zorbaproject/ArduinoModbusForDraginoRS485>>url:https://github.com/zorbaproject/ArduinoModbusForDraginoRS485]]
557 +
558 +
559 +== 1.9 Example 9: RS485-LN and ultrasonic flow meter transmission data ==
560 +
561 +
562 +It shows how to use RS485-LN to connect to an ultrasonic flow meter and read the data from the ultrasonic flow meter.
563 +
564 +
565 +Need to prepare RS485-LN, recharger, Electric wire
566 +
567 +[[image:1720669739434-926.png]] [[image:1720669744315-613.png]]
568 +
569 +
570 +=== 1.9.1 Setting Ultrasonic Flowmeter ===
571 +
572 +
573 +Adjust the M option corresponding to the ultrasonic flowmeter as follows
574 +
575 +M52 sets RS485 Port.
576 +
577 +[[image:1720669933691-331.png]]
578 +
579 +
580 +M62 sets 9600, none, 1
581 +
582 +[[image:1720669981767-254.png]]
583 +
584 +
585 +M63 sets automatic
586 +
587 +[[image:1720670003601-544.png]]
588 +
589 +
590 +=== 1.9.2 Setting Dragino RS485-LN ===
591 +
592 +
593 +The RS485-LN wiring port is as shown below. Connect the power supply and RS485 A/B line according to the diagram.
594 +
595 +[[image:1720670016539-422.png]][[image:1720670019136-658.png]]
596 +
597 +
598 +=== 1.9.3 Connect the RS485-LN to Ultrasonic Flowmeter ===
599 +
600 +
601 +According to the instructions of the ultrasonic flow meter, 26 and 27 are the + and - of RS485, corresponding to the A and B ports of RS485.
602 +
603 +[[image:1720670035661-234.png]][[image:1720670041974-372.png||height="417" width="436"]]
604 +
605 +
606 +=== 1.9.4 Full wiring example ===
607 +
608 +
609 +The yellow wire connects port 26 and port A of RS485-LN.
610 +
611 +The green wire connects port 27 and port B of RS485-LN.
612 +
613 +[[image:1720670079781-764.png]]
614 +
615 +
616 +=== 1.9.5 How to read ultrasonic flow meter data via RS485 ===
617 +
618 +
619 +[[image:1720670090204-634.png]]
620 +
621 +
622 +For example, I want to read Positive
623 +
624 +Through M02, we can see that the POS data is 54.9862
625 +
626 +[[image:1720670103571-173.png]][[image:1720670108127-723.png||height="597" width="645"]]
627 +
628 +Registers are 9-12, so the read command is AT+CFGDEV=01 03 00 08 00 04,1(,1 is used for automatic complement)
629 +
630 +[[image:1720670123955-149.png]]
631 +
632 +AT+CFGDEV=01 03 00 08 00 04 c5 cb ,1
633 +
634 +RETURN DATA:
635 +
636 +01 03 08 00 36 00 00 78 79 3f 7c 1a bc
637 +
638 +
639 +OK
640 +
641 +
642 +00 36 00 00 is the integer of the read value
643 +
644 +78 79 3f 7c is a decimal, but it needs to be converted and parsed into floating point. The parsing order is CDAB, which is 3f 7c 78 79
645 +
646 +Conversion and parsing website:http:~/~/www.speedfly.cn/tools/hexconvert/
647 +
648 +[[image:1720670134750-980.png]]
649 +
650 +
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