BACKn retrieves a value from the specified variable n slots (days, hours, minutes depending on variable type) in the past. Searches up to 183 slots back.

SYNTAX:

BACKn(Vx)
where :
n is the number of slots to look back
Vx is a variable

NOTES:

This function requires the target and source variable frequencies to match. E.g. Hourly target variable = Hourly source variable, 5-Minute Target variable = 5-Minute Source Variable. If the frequencies do not match, the function will return incorrect values.

EXAMPLES:

V17 = BACK5(V16) returns the value stored in variable 16 five days in the past.

Example 2 - Get V3141 (5-min Parameter) values and place 10 minutes (2 '5-min' slots) back into V131 (5-min Calc)

BACK2(V3141)

See Also: LV