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

Jose Jiménez 3 years ago in Devices / Modbus • updated by Costel Miron 2 years ago • 4

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

Jürgen Jürgenson 3 years ago

Have you tried setting the data format to big endian?

Jose Jiménez 3 years ago

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)

Jürgen Jürgenson 3 years ago

Try to rise the command delay and read delay.

Costel Miron 2 years ago

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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