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+--- Thread: Modbus TCP (/showthread.php?tid=3257)
Modbus TCP - Alexander - 25.03.2021
Hi,
I am trying to figure how to get data from my heat pump via modbus tcp.
I have connection with my device:
But is there some kind of tutorial how to read/write data from my device in LM?
I got a parameter list from Nibe, with all the objects.
RE: Modbus TCP - admin - 25.03.2021
See this thread: https://forum.logicmachine.net/showthread.php?tid=903
RE: Modbus TCP - Alexander - 25.03.2021
(25.03.2021, 15:57)admin Wrote: See this thread: https://forum.logicmachine.net/showthread.php?tid=903
I have seen this, but is it different between MODBUS TCP and RTU?
RE: Modbus TCP - Daniel - 25.03.2021
If registry are the same then you can use same profile. Delete this part "bus_address": "4/1/0",
RE: Modbus TCP - Alexander - 25.03.2021
(25.03.2021, 16:11)Daniel. Wrote: If registry are the same then you can use same profile. Delete this part "bus_address": "4/1/0",
Can you show me an script example how to read this value in LM?
RE: Modbus TCP - admin - 26.03.2021
Try this and please link the whole documentation next time. I've set the address to 0 as it looks like you need to subtract 1 from the documented address. Try setting it back to 1 if reading does not work. You will have to delete the device and create it again after uploading updated profile.
Code:
{
"manufacturer": "NIBE Heat Pump",
"description": "VVM S320 / S325",
"mapping": [
{
"name": "Outdoor temperature (BT1)",
"bus_datatype": "float16",
"datatype": "int16",
"type": "inputregister",
"address": 0,
"value_multiplier": 0.1
}
]
}