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+--- Thread: Modbus RTU behavior (/showthread.php?tid=1870)
Modbus RTU behavior - JohnTH - 28.01.2019
Hi,
When I run read test from device I get correct result.
When I try with this profile:
{
"manufacturer": "Kamstrup",
"description": "Fjernvarme modbus",
"mapping": [
{ "name": "Heat_Energy", "bus_datatype": "float32", "type": "inputregister", "address": 20, "writable": 0}
]
}
I get this error in log:
I select rtu2 with default timeout and poll interval. What am I missing?
-John
RE: Modbus RTU behavior - admin - 28.01.2019
You are missing "datatype": "float32". Without that it will only read single register producing an error.