Turn on output pin


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  1. #1
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    Jun 2006
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    Default Turn on output pin

    I have two sensors to control one rele.
    One for volt and one for temperature.
    When the temperature (Vout) exceed the limit (P3) turn on the rele
    and if the temperature is below the limit turn of the rele.
    I want now , if the volt (value2) exceed the limit (P5) turn on the rele
    and stay on for forever, but i don't know how


    Code:
        If Vout >= P3 then                'Temp
            PORTA.0=1
            Pause 1000
                else
            PORTA.0=0
        endif
        		            
        If value2 >= P5 then  PORTA.0=1    'Volt
    P3 and P5 is the limit

  2. #2
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    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.

  3. #3
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    Quote Originally Posted by HenrikOlsson View Post
    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.
    Thank you
    If i want to add two more value

    If value >= P1 then PORTA.0=1
    If value1 >= P2 then PORTA.0=1

    how to make this;

  4. #4
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    Hi Savnik,
    Looks like a job for select case - see page 129 in . . dare I say . .the manual.
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  5. #5
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    Quote Originally Posted by Joe S. View Post
    Hi Savnik,
    Looks like a job for select case - see page 129 in . . dare I say . .the manual.
    I read the select case in page 129 , but i cann't understand how to write the code , because i have many variables

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