Hi,
How about this:
Code:
Relay var PortA.0                       'Relay connected to PortA.0
Latch var bit

ON CON 1                                'Constant for relay ON
OFF CON 0                               'Constant for realy OFF

Latch = 0

Start:
  If Value2 >= P5 then Latch = 1        'Remember that Value2 has exceeded limit

  If (Vout >= P3) OR (Latch = 1) then   'Relay ON if Vout is over limit OR Value2 is or have been.
    Relay = ON
  ELSE
    Relay = OFF
  EndIf
  Pause 1000
Goto Start
Once Value2 is bigger than (or equal to) P5 the relay will turn ON and stay ON forever. Otherwise the state of the relay depends on Vout.

/Henrik Olsson.