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Posted: **Wed Mar 05, 2014 10:45 pm**

Hey there!

I've got a "simple" problem, so:

(This is just an example i know it has no sense):

http://imgur.com/WogIgo1

I have to SET Variable to 1 after i press on START and then i have to RESET it to 0 when i press START again and so on to make some Function get to work. I tho it would be easy but i am stuck

. I have no idea how to SET/RESET it after i press START. Any advices?

Thanks.

Posted: **Thu Mar 06, 2014 5:44 am**

Is it principally to use ladder? Try this way:

Code: Select all

IF Start THEN
	IF NOT flag THEN
		Out := NOT Out;
	END_IF;
	flag := TRUE;
ELSE
	flag := FALSE;
END_IF;

where

Code: Select all

FUNCTION_BLOCK start_example
VAR_INPUT
	Start: BOOL;
END_VAR
VAR_OUTPUT
	Out: BOOL;
END_VAR
VAR
	flag: BOOL; (* aux.var *)
END_VAR

Posted: **Thu Mar 06, 2014 7:18 am**

Forgot to mention. I have to use ladders

. Any example would be appreciated.

Posted: **Thu Mar 06, 2014 11:49 am**

Example with falling edge detector (temp: F_TRIG)

PLCforum.uz.ua

[Newbie Question][Proficy Machine Edition] If Statement

[Newbie Question][Proficy Machine Edition] If Statement

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Re: [Newbie Question][Proficy Machine Edition] If Statement

Re: [Newbie Question][Proficy Machine Edition] If Statement