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+--- Thread: read value from two modbus adresses (/showthread.php?tid=4998)
read value from two modbus adresses - mellotron - 30.09.2023
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
RE: read value from two modbus adresses - Erwin van der Zwart - 30.09.2023
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()