Last modified by Karry Zhuang on 2024/07/11 11:58
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... ... @@ -38,6 +38,7 @@ 38 38 * [[Video Demo>>url:https://www.youtube.com/watch?v=TAFZ5eaf-MY&t=6s&ab_channel=XavierFlorensaBerenguer]] 39 39 40 40 41 + 41 41 == 1.2 Example 2: Connect to Pulse Counter == 42 42 43 43 ... ... @@ -61,6 +61,7 @@ 61 61 * [[Dragino Solution in Farm>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/&file=Dragino%20on%20Farms.pptx]] 62 62 63 63 65 + 64 64 == 1.3 Example 3: Use RS485-LN with energy meters == 65 65 66 66 === 1.3.1 OverView === ... ... @@ -157,6 +157,7 @@ 157 157 * 08 FD is register data. Use short integer 16 bits to convert to decimal, get 2301, then 230.1V is the voltage. 158 158 159 159 162 + 160 160 === 1.3.3 How to configure RS485-LN and parse output commands === 161 161 162 162 ... ... @@ -515,6 +515,7 @@ 515 515 * 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"]] 516 516 517 517 521 + 518 518 == 1.5 Example 5: SEM Three Energy Meter with RS485-BL or RS485-LN == 519 519 520 520 ... ... @@ -525,6 +525,7 @@ 525 525 * 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"]] 526 526 527 527 532 + 528 528 == 1.6 Example 6: CEM C31 485-T1-MID Energy Meter with RS485-LN == 529 529 530 530 ... ... @@ -533,6 +533,7 @@ 533 533 * 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);"]] 534 534 535 535 541 + 536 536 == 1.7 Example 7: Schneider Electric PLC M221 with RS485-BL == 537 537 538 538 ... ... @@ -544,6 +544,7 @@ 544 544 * [[Reference Instruction>>url:https://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Schneider%20Electric%20PLC/]] 545 545 546 546 553 + 547 547 == 1.8 Example 8: This sketch is supposed to test Dragino RS485-BL (Modbus master), using an Arduino UNO as a Modbus slave. == 548 548 549 549 ... ... @@ -555,96 +555,4 @@ 555 555 556 556 [[https:~~/~~/github.com/zorbaproject/ArduinoModbusForDraginoRS485>>url:https://github.com/zorbaproject/ArduinoModbusForDraginoRS485]] 557 557 558 - 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 - 650 650
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