Logging historic values of a Tag

I'm doing a routine that will average out a value based on a real-time measurement and create an alarm level X% higher than the value.

This routine will be reset pretty often and the alarm level tag will change each time due to the measurement being significantly higher or lower.

My question is: Is there a way to log or keep a record of the alarm level tag value each time the routine is reset and a new alarm value is set?

Thanks,

David Fogle

@David: Yes, you can set up an FIFO array and every time you reset you enter data to the FIFO array , the size of array depends on how many values you want to preserve.