F&F LE-03MQ Modbus energy counter

[buuuudzik]

1) I've tried also with switching on Modbus mapper, and after this, reading all of this registers takes only 4 seconds so I see that other RS-485 inputs are connected with themselves.

2) When I switched on the Modbus mapper then still reading the registers via script takes 3-5 seconds. It is enough, but if there would be a possibility to go down to 1 second it would be great from the learning point What I can improve in below script? (When I am changing timeout the interval is still the same)

Code:

start = os.microtime()

require('json')
require('luamodbus')
mb = luamodbus.rtu()
mb:open('/dev/RS485-2', 9600, 'N', 8, 1, 'H')
mb:connect()
timeout = 0.020
mb:setresponsetimeout(timeout)
mb:setslave(4)


energyMeters = [[
{
 "manufacturer": "F&F",
 "description": "Licznik energii LE-03MQ",
 "mapping": [
    { "address": 0, "name": "Napięcie fazowe L1", "delta": 2 },
    { "address": 2, "name": "Napięcie fazowe L2", "delta": 2 },
    { "address": 4, "name": "Napięcie fazowe L3", "delta": 2 },
    { "address": 6, "name": "Natężenie prądu L1", "delta": 0.5 },
    { "address": 8, "name": "Natężenie prądu L2", "delta": 0.5 },
    { "address": 10, "name": "Natężenie prądu L3", "delta": 0.5 },
    { "address": 12, "name": "Moc czynna L1", "delta": 50 },
    { "address": 14, "name": "Moc czynna L2", "delta": 50 },
    { "address": 16, "name": "Moc czynna L3", "delta": 20 },
    { "address": 24, "name": "Moc bierna L1", "delta": 50 },
    { "address": 26, "name": "Moc bierna L2", "delta": 50 },
    { "address": 28, "name": "Moc bierna L3", "delta": 50 },
    { "address": 30, "name": "Współczynnik mocy L1", "delta": 0.01 },
    { "address": 32, "name": "Współczynnik mocy L2", "delta": 0.01 },
    { "address": 34, "name": "Współczynnik mocy L3", "delta": 0.01 },
    { "address": 52, "name": "Całkowita moc układu", "delta": 50 },
    { "address": 60, "name": "Całkowita moc bierna układu", "delta": 50 },
    { "address": 62, "name": "Współczynnik mocy układu", "delta": 0.01 },
    { "address": 70, "name": "Częstotliwość napięć zasilania", "delta": 0.25 },
    { "address": 200, "name": "Napięcie międzyfazowe L1-L2", "delta": 2 },
    { "address": 202, "name": "Napięcie międzyfazowe L2-L3", "delta": 2 },
    { "address": 204, "name": "Napięcie międzyfazowe L3-L1", "delta": 2 },
    { "address": 224, "name": "Prąd przewodu zerowego", "delta": 1 },
    { "address": 234, "name": "Współczynnik zawartości harmonicznych napięcia L1-N", "delta": 1 },
    { "address": 236, "name": "Współczynnik zawartości harmonicznych napięcia L2-N", "delta": 1 },
    { "address": 238, "name": "Współczynnik zawartości harmonicznych napięcia L3-N", "delta": 1 },
    { "address": 240, "name": "Harmoniczne prądu fazy 1", "delta": 1 },
    { "address": 242, "name": "Harmoniczne prądu fazy 2", "delta": 1 },
    { "address": 244, "name": "Harmoniczne prądu fazy 3", "delta": 1 },
    { "address": 334, "name": "Harmoniczna napięcia międzyfazowego L1-L2", "delta": 1 },
    { "address": 336, "name": "Harmoniczna napięcia międzyfazowego L2-L3", "delta": 1 },
    { "address": 338, "name": "Harmoniczna napięcia międzyfazowego L3-L1", "delta": 1 },
    { "address": 342, "name": "Całkowita energia czynna", "delta": 0.1 },
    { "address": 344, "name": "Całkowita energia bierna", "delta": 0.1 }    
 ]
}]]

errors = 0

energyMeters = json.decode(energyMeters)
meterName = 'Licznik 1 - '

function readRegister(meterName, address, name, delta)
 for i = 1, 7, 1 do
   res, err = mb:readinputregistervalue(address, "float32", "w")
   if res then
       GA = meterName .. name
         value = math.round(res, 2)
     grp.checkwrite(GA, value, delta)
     break
   else
     errors = errors + 1
   end
 end
end

for k,meter in pairs(energyMeters.mapping) do
 readRegister(meterName, meter.address, meter.name, meter.delta)
end


mb:close()


developmentInfo = false


if developmentInfo then
log('Duration: ' .. os.microtime()-start .. 's, ' .. errors .. 'errors')
end

If it is about LM Load Balancer please provide some example how can I mount RS-485<>USB converter ch340.

http://blog.lincomatic.com/?p=1616