Function 16 modbus

[AndresMezaAyala]

Hi, I have this register: 0022H ---uint16
This has 16 bits, counting from 0 to 15, bits 12 and 13 are for the activation of a relay, how do I write to those bits with the 16 modbus function?

[Daniel]

Add write_multiple to force to use function 16. Use value_bitmask and write_bitmask to write to specific bits.
https://openrb.com/docs/modbus.htm
https://forum.logicmachine.net/showthrea...29#pid6729

[AndresMezaAyala]

Add write_multiple to force to use function 16. Use value_bitmask and write_bitmask to write to specific bits.
https://openrb.com/docs/modbus.htm
https://forum.logicmachine.net/showthrea...29#pid6729

Thanks

[AndresMezaAyala]

Add write_multiple to force to use function 16. Use value_bitmask and write_bitmask to write to specific bits.
https://openrb.com/docs/modbus.htm
https://forum.logicmachine.net/showthrea...29#pid6729

So I have the Json but it is not working for me, can it be done by script? and how?

{
    "manufacturer": "PRUEBA",
    "description": "prueba",
    "mapping": [
    { 
        "name": "Salida 1",
        "bus_datatype": "bool",
        "datatype": "uint16", 
        "type": "inputregister", 
        "address": 34, 
        "value_bitmask": "0x1000",
        "write_multiple": 1,
        "writable": 1,
        "bus_address": "" },
    { 
        "name": "Salida 2",
        "bus_datatype": "bool",
        "datatype": "uint16", 
        "type": "inputregister", 
        "address": 34, 
        "value_bitmask": "0x2000",
        "writable": 1,
        "write_multiple": 1,
        "bus_address": "" }            
    ]
} 

[Daniel]

Try address 33, are you sure it is inputregister?

[Daniel]

And make sure you use firmware from 2021

[AndresMezaAyala]

And make sure you use firmware from 2021

I am using version 20190904, but, That register, bits 8 and 9 are for reading input values, and it is marking me reading normally. The problem is when I want to write to those bits.

[Daniel]

This is not supported in this fw. Install RC2 2021