read value from two modbus adresses

[mellotron]

hi please how can i read the value in 32bit format which use 2 modbus adresses one for lsb and other fr msb in logic magine

[Erwin van der Zwart]

Try this:

Code:

require('luamodbus') mb = luamodbus.rtu() mb:open('/dev/RS485', 19200, 'N', 8, 1, 'H') mb:connect() mb:setslave(1) value = mb:readregistervalue(1234,"float32","n")  -- n=no swap, w=word swap, b=byte swap, bw=byte and word swap mb:close()