Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

Problem Reading data from BH485-DO Sensors using RS232-485 converter

Status
Not open for further replies.
S

spinix

Newbie level 3
Joined
Jul 5, 2017
Messages
3
Helped
0
Reputation
0
Reaction score
0
Trophy points
1
Activity points
22
HI i am trying to read data from a RS485-DO sensor using RS232-485 conveter and a modbus(mtester) .
am getting error no POD detected.
when i use simply modbus master timeout error

any suggestions on how to proceed .

thanks in Advance
 

Hi,

Show your circuit.
Show your code.
And show scope pictures of the communication.

Klaus
 

KlausST said:
Hi,

Show your circuit.
Show your code.
And show scope pictures of the communication.

Klaus
Click to expand...
hi this is how am connecting . P_20170705_113352_p.jpgP_20170705_111707_p.jpgDiagram.png
Appreciate all the help . thanks in advance
 

There is a very common mistake with RS485: forgetting the termination resistor.
Have you included it?
 

schmitt trigger said:
There is a very common mistake with RS485: forgetting the termination resistor.
Have you included it?
Click to expand...

First thanks a lot for responding and trying to help.
i Connected this setup with sensors(DO,pH,Temperature) from France with 12v(specified in the specs provided) and able to read them with MODBUS.But the sensors from china BH485 (DO,pH) are not giving any data in MODBUS .No Technical support from the seller .so am struck

Thanks
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top