CODESYS - the IEC 61131-3 automation software

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 Post subject: Start contact
PostPosted: Wed May 24, 2017 3:29 pm 
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Joined: Thu Feb 23, 2017 5:07 pm
Posts: 90
Good morning,
I would have a question for you:
Is there a way to have a conception that opens and then closes when the program starts on the plc?
In my project I have 4 OSCAT timers that at a certain time perform an operation only that every time the application loads on the plc the timers leave.
I would like to create a denied contact that at startup interrupts the timer output to say 5 seconds and then closes.

it's possible ?

Thank you, Alberto


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 Post subject: Re: Start contact
PostPosted: Sun Sep 24, 2017 1:32 pm 
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Frequent User
Frequent User

Joined: Fri Sep 02, 2011 8:02 pm
Posts: 312
I see you never received an answer. Hopefully you solved this. Otherwise my idea:

Define another timer for 5 seconds and call it all the time.

Code:
VAR
   BootDone : TON;
 END_VAR
 
 BootDone(IN:=TRUE, PT:=T#5S);
 IF BootDone.Q THEN
    //ok to use other timer values now
 END_IF
 

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