Hello hope some one can help me as a newbee in modbus i have (3) heatpumps (for cascade) but i do not get acces to the heat pump data.
I have set up a dell laptop with a usb to RS 485 interface.
I dont know what i do wrong.
I get back two messages:
1-Modbus error exception respons from slave device
2-Checksum erro in responce message
in the return is see: 40321 return value --27076
i have attached several pictures of information i have.
(sorry for bad EN)
In case of anny question, please ask.
Marienk
I have set up a dell laptop with a usb to RS 485 interface.
I dont know what i do wrong.
I get back two messages:
1-Modbus error exception respons from slave device
2-Checksum erro in responce message
in the return is see: 40321 return value --27076
i have attached several pictures of information i have.
(sorry for bad EN)
In case of anny question, please ask.
Marienk
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