Output Question

JohnnyQuanex

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Cambridge, Ohio

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• Sep 2, 2016

• #1

I'm firing and output and I need it to stay on for at least 2 seconds...

What's the best way to do this?

Studio 5000
L27-ERM CompactLogix
Discrete 24V Output


Thanks,

John Whited

 

the_msp

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• Sep 2, 2016

• #2

Create a seal in circuit that has a timer branched with the output. When the timer is done, break the seal.

Maybe not the best way, but a way...

 

the_msp

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• Sep 2, 2016

• #3

Here you go:

[XIC(switch),XIC(output)]XIO(delay.DN)[OTE(output),TON(delay,?,?)];

Ignore the aliases in the image below, but had to test it for you

(Click to enlarge)

 

dragonx556

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Oct 2015

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USA

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• Sep 3, 2016

• #4

Another option is to use the TOF instruction.

Linked is the RSLOGIX 500 version, but the Studio5000 will identical with a preset value of 2000 rather than 2.
https://s16.postimg.io/iu3ma334z/Output_Stay_On_2_Sec_After_Input_Off.jpg

 

the_msp

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Northern Ireland

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• Sep 3, 2016

• #5

Good thinking dragonx however the OP needs to know there is a slight difference in the two methods...

if the input is switched again during the two seconds, using the TON method the output delay will not be extended. Using the TOF method it will. Which one suits best for the OP, he will need to decide.