Last modified by Karry Zhuang on 2024/07/11 11:58
Change comment:
Uploaded new attachment "1720670108127-723.png", version {1}
Summary
-
Page properties (1 modified, 0 added, 0 removed)
-
Attachments (0 modified, 0 added, 2 removed)
Details
- Page properties
-
- Content
-
... ... @@ -562,89 +562,6 @@ 562 562 It shows how to use RS485-LN to connect to an ultrasonic flow meter and read the data from the ultrasonic flow meter. 563 563 564 564 565 -Need to prepare RS485-LN, recharger, Electric wire 566 566 567 -[[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 - 566 +* **Specific steps**: RS485-LN with ultrasonic flow meter 567 +*
- 1720670123955-149.png
-
- Author
-
... ... @@ -1,1 +1,0 @@ 1 -XWiki.karry - Size
-
... ... @@ -1,1 +1,0 @@ 1 -22.1 KB - Content
- 1720670134750-980.png
-
- Author
-
... ... @@ -1,1 +1,0 @@ 1 -XWiki.karry - Size
-
... ... @@ -1,1 +1,0 @@ 1 -116.5 KB - Content