Add this code to PLC script.
if (inCycle == 1) then 
    local s  = mc.mcCtrlGetRunTime(inst)/10;
    local time = string.format("%.2d:%.2d:%.2d", s/3600, s/60%60, s%60);
    scr.SetProperty('lblTime','Label',  tostring(time));
end
Then add this code to the reset button so it zero's out on a reset.
scr.SetProperty('lblTime','Label',  "00:00:00");

You will need a label on the screen so you have a place to put the text.
I copied the text just above it then just added a label for the time value.
I plan on looking to see how the M30 gets processed so I can add a parts counter and accumulated time of all the parts.

Glenn

great keep us posted... am wanting to add the same featurs but I'm having a lot of trouble figuring out Lua.

Hi,
Sorry that i have to reopen this topic, but i don´t get the Runtime Counter to work i have added the scripts to the PLC and the Reset button as above mentioned.
But how do i get the Readings to the Textbox? I don´t have any knowledge in Programming.