Belimo UK24MOD

[benthoma]

Hi, have someone integrated uk24mod on LM5 ?

What does the script look like to extract the different values of knx?

I need to itegrated 3 on each LM5.

https://www.belimo.eu/CH/EN/Product/Fire...=&TopCatNr=

[admin]

You don't need a script but a modbus profile. Which registers do you want to access apart from setpoint?

[Andey]

Here is a sample code after quick view on reference manual. Just to help you find a right way.

Code:

require('luamodbus')
mb1 = luamodbus.rtu()
-- RS-485 port name and number. here is RS485, but it can be RS485-1, RS485-2, ttyUSB0
-- connection parameters must to accord device settings
mb1:open('/dev/RS485', 38400, 'E', 8, 1, 'H')
mb1:connect()

-- select modbus slave ID for read/write operations (55 here)
mb1:setslave(55)

--[[
read values
we need to read hold register (command #3)
modbus we can to assess:
#1 - coil
#2 - discrete input
#3 - hold register
#4 - input register
]]--

-- read all registers related to first MP
i0, i1, i2, i3, i4, i5, i6, i7, i8, i9, i10, i11, i12, i13, i14, i15, i16, i17, i18, i19 = mb1:readregisters(0, 20)

-- do something with this information

-- set setpoint to 50
mb1:writeregisters(0, 50)

mb1:close()

And my question to LM gurus: what will happens if there are device listed in 'ModBus' table located on the same RS485 bus. I assume that connection parameters are the same and there is no address conflict.

[admin]

You should use a profile. If you want to use scripts and mapper on the same port then you need to use modbus proxy. See this for more info: https://forum.logicmachine.net/showthrea...53#pid1953

[benthoma]

You don't need a script but a modbus profile. Which registers do you want to access apart from setpoint?

OK, I want access all. Is there a easy way to make modbus profile?

[Daniel]

Here is profile documentation: https://openrb.com/docs/modbus.htm
Here are different examples: https://forum.logicmachine.net/showthread.php?tid=839
It is good practice to use RTU read test to check all parameters before creating the profile.