ModBus TCP Slave

[Gadjoken]

Hello following the update of a HomeLynk I have my script for sending data on a IRIO that no longer works:

Code:

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SLAVE_ADDRESS='192.168.70.246' SLAVE_PORT=502 SLAVE_ID=1 NB=300   -- Number of coils, discrete inputs, holding registers and input registers WORD=16 DWORD=32 function update_registers(knx_address,registre_nb,size) val=grp.getvalue(knx_address)     if size==16 then         mb:setregisters(registre_nb,cnv.tonumber(val))   elseif size==32 then       shift=bit.rshift(cnv.tonumber(val),16)     mb:setregisters(registre_nb, shift,cnv.tonumber(val))       end end if not mb then require('luamodbus') mb = luamodbus.tcp() --¤ Set correct parameters for the connection t=mb:open(SLAVE_ADDRESS, SLAVE_PORT) -- TCP slave IP --¤ Connection o=mb:connect() --¤ Set TCP slave address mb:setslave(SLAVE_ID)   -- init slave storage for coils, discrete inputs, holding registers and input registers mb:setmapping(0, 0, NB, 0) end update_registers("3/1/10",0,DWORD) update_registers("3/2/10",2,DWORD) update_registers("3/3/1",4,DWORD) update_registers("3/3/2",6,DWORD) update_registers("3/4/1",8,DWORD) update_registers("3/4/2",10,DWORD) update_registers("3/5/1",12,DWORD) update_registers("3/5/2",14,DWORD) update_registers("3/6/10",16,DWORD) update_registers("2/0/0",18,DWORD) update_registers("2/0/1",20,DWORD) update_registers("2/0/2",22,DWORD) update_registers("2/0/3",24,DWORD) mb:handleslave()

here is the error : 
Resident script:20: attempt to index global 'cnv' (a nil value)
stack traceback:
Resident script:20: in function 'update_registers'

Do you have a solution to restore the connection?
Thanks.
B.R.

[admin]

Replace all instances of cnv.tonumber(val) with tonumber(val) or 0

[Gadjoken]

Replace with tonumber (val) and error message is :
Resident script:20: bad argument #1 to 'rshift' (number expected, got nil)
stack traceback:
[C]: in function 'rshift'
Resident script:20: in function 'update_registers'

I tried with 0 no error but no communication.
B.R.

[admin]

Can you log what value are you trying to convert to number. Is it Boolean value?

[Gadjoken]

I sent data 2 Bytes floating point.
B.R.

[admin]

2 Bytes floating point is a number so it cannot raise an error. Can you post data types for all objects?

Try this function instead of tonumber (add it to script and replace tonumber with mbtonumber):

Code:

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function mbtonumber(val)   if type(val) == 'boolean' then     return val and 1 or 0   else     return tonumber(val) or 0   end end