Making relay in structured text language

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i have a software for some comperssor , and i want to turn it on after 5 seconds from getting demand for runnig , and trun it off after 5 seconds from getting demand for stop.
the delay of run works rightly , but the delay of stop does not work

What I have tried:

IF COMPRESSOR_IN = TRUE THEN
	TON_1(TRUE, t#5s);
	COMPRESSOR_OUT := TON_1.Q;	
ELSIF COMPRESSOR_IN = FALSE THEN
	TON_2(FALSE, t#5s);
	COMPRESSOR_OUT := TON_2.Q;
	TON_1(FALSE, t#5s);
END_IF;

Posted 16-Jul-18 19:48pm

BaselAla

Updated 16-Jul-18 19:56pm

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Comments

Manish K. Agarwal 17-Jul-18 2:01am

what is TON_1 and TON_2?

BaselAla 17-Jul-18 2:05am

they are a ready block for making delay . thier inputs : bool and time . their outputs are bool and time too .

11917640 Member 17-Jul-18 2:58am

Delay of stop does not work - this means, something is wrong in TON_2 function. You need to provide more information.

[no name] 17-Jul-18 15:07pm

How many different values can "COMPRESSOR_IN" have? (Why "elseif" if it's a bool?)

Why is TON_2 never "turned on"?

BaselAla 19-Jul-18 8:54am

yes , COMPRESSOR_IN is a bool .

BaselAla 19-Jul-18 9:05am

here it works :
TON_1(TRUE, t#5s);
COMPRESSOR_OUT := TON_1.Q;
TON_2(FALSE, t#5s);
ELSE
TON_2(TRUE, t#5s);
COMPRESSOR_OUT := NOT(TON_2.Q);
TON_1(FALSE, t#5s);
END_IF;

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