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+--- Thread: Modbus RTU - Function 16 (write multiple holding registers) (/showthread.php?tid=30)
Modbus RTU - Function 16 (write multiple holding registers) - Pawel - 10.07.2015
Hi,
I have problem with modbus rtu integration with NIBE Heat pump. I have established connection via modbus rtu with modbus 40 extension of this heat pump. Reading working properly, but if i want to write some registers, i have to use write multiple holding registers (function 16), despite of fact that I write only one register.
If I use mb:writeregisters function there is no possibility to choose 06 function or 16 function, but i have to have 16 function to proper write command
using
Code:
mb:writeregisters (registers, value, nil)doesn't work.
Do you have any idea how do that? Maybe using mapping of modbus registers resolve problem?
RE: Modbus RTU - Function 16 (write multiple holding registers) - admin - 10.07.2015
Try this, it will force using command 16 instead of 06 even when writing to a single register:
Code:
mb:writemultipleregisters(register, value)RE: Modbus RTU - Function 16 (write multiple holding registers) - Pawel - 10.07.2015
Nice,
Thanks you.
