Modbus: RS485 Port Settings

[@zz3709]

That accent... Trini!

[@oyunstudyosuyt454]

hello, I have problem... three RS 485 sensors, connected to PC com port.. two sensors cowork fine, when I connect another one, all FAIL data transfer... please advice what to do...

[@deepkumar-hk6wl]

hello sir,.... In rs485 4-5 devices are connected with modbus and 2 display is connected only as receiver , It is working fine ......Is there any chance of problem in future ???

[@EmileAckbarali]

From what you have described, that should be fine.

[@deepkumar-hk6wl]

@@EmileAckbarali thank you for reply...

[@johnsonemmanuel]

Hi, I am extracting data using rs485. when I extract data using modbus the voltage(using pymodbus) shows 17056(int) . but in actual voltage is something around 235.xx. Is there any conversion required? I also want to know about MSRF and LSRF. becuase when I tried with modbus32 software, decimal shows 17056 but Float MSRF shows 235.xx . any help on this

[@EmileAckbarali]

Hi Johnson. So what you are trying to read is a floating point value. That would be a 32-bit value. The lower word would be stored in a 16-bit register and then the upper word would be stored in the next consecutive 16-bit register. Modscan32 is able to combine the 2 registers and then perform a calculation to convert to float. The calculation is not trivial. If you are using PyModbus, please have a look at following example that shows decoding for different data types, inclusive of floating point ... pymodbus.readthedocs.io/en/latest/source/example/modbus_payload.html

[@johnsonemmanuel]

@@EmileAckbarali Thank you so much! Solved it :)

[@EmileAckbarali]

@@johnsonemmanuel So very pleased that you solved it. Great job!

[@mohammedaslam8864]

All Modbus parameters shall be same for all devices in a network except device ID as device ID shall be unique

[@puncheonandmauby1]

I know that trini accent anywhere.

[@EmileAckbarali]

Ah cyar hide at all! :)

[@eng.aymanelsayed5159]

nice video . thanks

[@mohamedrashad2674]

Hi .. I have a problem and need your help

[@bitebonumbere1426]

Please can you add subtitles to all your KZbin videos?