Bad communication between Jigsaw and MIM-B19N (MODBUS SAMSUNG)

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Jose Jiménez
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Hi everyone,

i have a jigsaw connected to a Modbus interface module MIM-B19N Samsung. I have the next parameters:

Image 3875

I attach the datasheet of this module to compare if you need:  Manual Interface MODBUS Maquinas clima Samsung.pdf


The question is that some times, randomly, the communication breaks down and we can control any of indoor units we have. In addition, i attach a screenshot of Jigsaw's logs:


Image 3877

I don't know if the problem is because of driver's parameters or firmware error. I will appreciate any help .

Thanks

Replies 6
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1
Tanel Matsi

Managed to get it working. ReadMultiple gives error. ReadSingle works fine.

Program here if you need one.

https://www.dropbox.com/scl/fi/e6on33lgznbokncf2qfu5/Samsung-MIM-B19N_ACDC.bos?rlkey=98un91gfzyzn2jytb5u2jo4zp&st=c89b6t5i&dl=0

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0
Tanel Matsi

Hello

Does anybody have a working demo of MIM-B19N? I am strugling with the connection and I am not sure if there is a Jigsaw RS485 problem or MIM side problem. I am not able to read any values.

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0
Costel Miron

Hi Jose, I've got the same error, trying to communicate with an energy meter and replacing the modbus dongle solved the issue.

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Jürgen Jürgenson
Quote from Jose Jiménez

If i put Big endian, the data shows this:

Instead if i put little endian, the data shows correctly:

I don't understand why i can read this value (register 75) but i can control, for example, on/off unit (register 74)

Try to rise the command delay and read delay.

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0
Jose Jiménez

If i put Big endian, the data shows this:

Instead if i put little endian, the data shows correctly:

I don't understand why i can read this value (register 75) but i can control, for example, on/off unit (register 74)

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0
Jürgen Jürgenson

Have you tried setting the data format to big endian?


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