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help needed for compactrio programming

Hello all,

 

I am very new to LabVIEW programming.I've an application where it's required to acquire temprature data at a perticular duration  from a heater.Depending upon the differance between current temp (process varible)and set temprature,heater  has to make ON and OFF in a controlled way to reach the set value.

 

I have made a loop where i am acquireing temp data at every 30 sec interval and depending upon temprature diff between set value and present value ,am genarting a pulse   (for eg. 22 sec on period and 8 sec off period).Inside that loop  I am driving the "True" value to DIO of CompactRIO  for ON period to make the  heater ON .Problem what I am facing is the heater is not gaetting ON at Exact 0 to 22 sec and not OFF from 22 sec to 30 sec.

 

i have tried to use  separate loop for acustion ,analysis and control but not able  to synchonise all.Heater is getting ON and OFF randomly.Please help.

 

thanks

tapasm

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Can you post your code?

 

 

It would make is so much easier to help.

Tim
GHSP
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