troubleshooting modbus script to control fornius inverter

[cgn]

Thanks, that was an error as well. If someone what's to set the softlimit from a fronius inverter depending on the enery prices, this is the clean code: 

Code:

t = os.date ("*t")
value = grp.getvalue('34/1/' .. t.hour)

require('luamodbus')
mb = luamodbus.tcp()
mb:open('192.168.1.111', 502)
res, err = mb:connect()
mb:setslave(1)

if res then
    if (value <35) then
        mb:writeregisters(40236, 0)
        log('PV softlimit')
   
    else
    mb:writeregisters(40236, 0)
      mb:writeregisters(40232, 10000)
      mb:writeregisters(40236, 1) 
      log('PV unlimited')
      
    end
    mb:close()
 
else
  log('failed', err)
end