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... ... @@ -38,7 +38,6 @@ 38 38 * [[Video Demo>>url:https://www.youtube.com/watch?v=TAFZ5eaf-MY&t=6s&ab_channel=XavierFlorensaBerenguer]] 39 39 40 40 41 - 42 42 == 1.2 Example 2: Connect to Pulse Counter == 43 43 44 44 ... ... @@ -62,7 +62,6 @@ 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 65 - 66 66 == 1.3 Example 3: Use RS485-LN with energy meters == 67 67 68 68 === 1.3.1 OverView === ... ... @@ -159,7 +159,6 @@ 159 159 * 08 FD is register data. Use short integer 16 bits to convert to decimal, get 2301, then 230.1V is the voltage. 160 160 161 161 162 - 163 163 === 1.3.3 How to configure RS485-LN and parse output commands === 164 164 165 165 ... ... @@ -518,7 +518,6 @@ 518 518 * 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"]] 519 519 520 520 521 - 522 522 == 1.5 Example 5: SEM Three Energy Meter with RS485-BL or RS485-LN == 523 523 524 524 ... ... @@ -529,7 +529,6 @@ 529 529 * 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"]] 530 530 531 531 532 - 533 533 == 1.6 Example 6: CEM C31 485-T1-MID Energy Meter with RS485-LN == 534 534 535 535 ... ... @@ -538,7 +538,6 @@ 538 538 * 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);"]] 539 539 540 540 541 - 542 542 == 1.7 Example 7: Schneider Electric PLC M221 with RS485-BL == 543 543 544 544 ... ... @@ -550,7 +550,6 @@ 550 550 * [[Reference Instruction>>url:https://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Schneider%20Electric%20PLC/]] 551 551 552 552 553 - 554 554 == 1.8 Example 8: This sketch is supposed to test Dragino RS485-BL (Modbus master), using an Arduino UNO as a Modbus slave. == 555 555 556 556 ... ... @@ -562,4 +562,77 @@ 562 562 563 563 [[https:~~/~~/github.com/zorbaproject/ArduinoModbusForDraginoRS485>>url:https://github.com/zorbaproject/ArduinoModbusForDraginoRS485]] 564 564 558 + 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 M62 sets 9600, none, 1 M63 sets automatic 576 + 577 +[[image:1720669933691-331.png]][[image:1720669981767-254.png||height="550" width="412"]][[image:1720670003601-544.png||height="550" width="412"]] 578 + 579 + 580 +=== 1.9.2 Setting Dragino RS485-LN === 581 + 582 + 583 +The RS485-LN wiring port is as shown below. Connect the power supply and RS485 A/B line according to the diagram. 584 + 585 +[[image:1720670016539-422.png]][[image:1720670019136-658.png]] 586 + 587 + 588 +=== 1.9.3 Connect the RS485-LN to Ultrasonic Flowmeter === 589 + 590 + 591 +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. 592 + 593 +[[image:1720670035661-234.png]][[image:1720670041974-372.png||height="417" width="436"]] 594 + 595 + 596 +=== 1.9.4 Full wiring example === 597 + 598 + 599 +The yellow wire connects port 26 and port A of RS485-LN. 600 + 601 +The green wire connects port 27 and port B of RS485-LN. 602 + 603 +[[image:1720670079781-764.png]] 604 + 605 + 606 +=== 1.9.5 How to read ultrasonic flow meter data via RS485 === 607 + 608 + 609 +[[image:1720670090204-634.png]] 610 + 611 + 612 +For example, I want to read Positive 613 + 614 +Through M02, we can see that the POS data is 54.9862 615 + 616 +[[image:1720670103571-173.png]][[image:1720670108127-723.png||height="597" width="645"]] 617 + 618 +Registers are 9-12, so the read command is AT+CFGDEV=01 03 00 08 00 04,1(,1 is used for automatic complement) 619 + 620 +[[image:1720670123955-149.png]] 621 + 622 + 623 +00 36 00 00 is the integer of the read value 624 + 625 +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 79 626 + 627 +Conversion and parsing website:http:~/~/www.speedfly.cn/tools/hexconvert/ 628 + 629 +[[image:1720670134750-980.png]] 630 + 565 565
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