troubleshooting modbus script to control fornius inverter

[cgn]

Hello,

due to dynamic energy prices I wan't to enable / disable throttle of the inverter. This is possbile via modbus. Unfortunatelly it's not working and I have nothing in the log of LM. 

Code:

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require('luamodbus') mb = luamodbus.tcp() mb:open('192.168.1.111', 502) mb:connect() res, err = mb:connect() if res then     if (value <35) then     r0 = mb:writeregisters(40236, 0)         log(r0, '<')              else     r1 = mb:writeregisters(40236, 0)       r2 = mb:writeregisters(40232, 10000)       r3 = mb:writeregisters(40236, 1)        log(r1, r2, r3 '>')       mb:close()     end else   log('failed', err) end

Log if value <35
* arg: 1
  * nil
* arg: 2
  * string: <

=> This seems to work

Log if value >35
Nothing in the log and I don't know why. 

Any idea what could be wrong?

[admin]

You have two connect calls, remove one of them. Then log the error returned by the write call:

Code:

12

r0, err = mb:writeregisters(40236, 0) log(r0, err)

Same for all other registers.

[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:

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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