int16 on modbus script

[CristianAgata]

Hi everybody,
I've a problem on a script. I'm tring to read a solar inverter ZCSAzzurro. I've problem on negative number.
I've made this request:

if (res9[2] == nil) then
-- Chiamata potenza rete
  res10=nil
res10 = { mb:readregisters(530,dt.int16) }
  grp.update('Potenza_rete',(res10[1]))
log("Grind_power",res10)
  os.sleep(1.1)
  else
  --log("timeout!")
  mb:close()
end


But in the log I find the number 32767. But if try to make a read in the modbus scheduler I get -27 (right value)
Where am I wronging?

Thanks for who will help me.

BR Cristian

[admin]

Use this:

Code:

value = mb:readregistervalue(530, 'int16')

[CristianAgata]

Use this:

Code:

value = mb:readregistervalue(530, 'int16')

No, it doesn't work, it gives me an error of 'bad argument #2 ro readregisters (number expect, got string)
Best regards Cristian

[admin]

Use mb:readregistervalue not mb:readregisters.

[CristianAgata]

Use mb:readregistervalue not mb:readregisters.

Sorry

[admin]

The function for reading data with a set data type is called readregistervalue. Just use this code as is:

Code:

value = mb:readregistervalue(530, 'int16')

[CristianAgata]

Thanks man, now it works