Totalizer for 15 mins

[IVS 0]

Please help me how develop totalizer for every 15 mins , for real value. Real value should   be taken sample  for 1Sec.

[BobLfoot 301]

This sounds like a homework assignment, given how vague you're being.

Can you tell us the PLC and I/O card being used?

Also some idea of the Application would be useful.  

[IVS 0]

PLC :ALLEN BRADLEY 1756-L63

I/O : 1756-IF16 Analog I/P card

 

I want to convert Analog raw value to real and same to be generate a cumulative value for every 15 mins with 1 sec resolution.it has to be moved to scada.

 

[BobLfoot 301]

Ok given the hardware your using I would suggest the following.

Declared Variables would be QuantityThisSecond{real} , TotalThisFifteenMinutes{real}, TotalLastFifteenMinutes{real}, SampleCount{DINT}, ResetTotal{Boolean}

Use a Periodic Task set to fire once per second.

On the First Scan set TotalThisFifteenMinutes{real} and SampleCount{DINT} to Zero.

On each Period after that ADD TotalThisFifteenMinutes{real} to QuantityThisSecond{real} and place in TotalThisFifteenMinutes{real}. Then Increment SampleCOunt{DINT}

Next Each Period also check if SampleCOunt{DINT} is equal to 900.  If it is then Move TotalThisFifteenMinutes{real} into TotalLastFifteenMinutes{real} and ZERO TotalThisFifteenMinutes{real} and SampleCOunt{DINT}.

ALso Put in a rung that zeros everything lke at First Scan if Reset Total is true.

One suggestion that might work.