30.11.2020, 09:48
There's no such functionality built into schedulers. You will need an extra event script that is executed by a scheduler. It will send true to 1/1/1 if event value is true and current hour is less than 19.
Code:
value = event.getvalue()
hour = os.date('*t').hour
if value and hour < 19 then
grp.write('1/1/1', true)
end