[SOLVED] Sum up and multiply item values at startup

Setup, Configuration and Use Scripts & Rules
5

As mentionned before

Please follow the rules tutorial:
https://www.openhab.org/docs/tutorial/rules.html

Follow @rossko57 advice above
and you should end up with something like this

Notice the use of the code fences

rule “INIT”
when
    System started
then
    // Set WWALARM to off = 0
    WWALARM.sendCommand(OFF)

    // Calc PWWSUMME & PHEIZENSUMME
    var Number num1 = PWWSUMME1.state as Number
    var Number num2 = PWWSUMME2.state as Number
    var Number num3 = (num2 * 1000 + num1)

    PWWSUMME.postUpdate(num3)
end