Remaining time or counter

[admin]

This script is incorrect. grp.read sends read request but does not return current value. You need to use grp.getvalue instead.

It can also be simplified like this:

Code:

value = event.getvalue()
blocking = grp.getvalue('0/0/1')

if blocking then
  grp.write('0/0/2', value)
end

In FBeditor there's Select switch > Lock out block that can be used.