Calculating Time Difference Based On Row Criteria?

Jul 30, 2012

I am conducting some analysis on alarm data of certain devices and am looking for creating a VBA algorithm that will do the following (refer to the table below for example data)

I want identify an asset in alarm (Column F) and based on its asset ID (Column C) and Fault Description (Column D) then find the row when the asset with the same asset ID and fault description returns to an 'ok' Asset State. After the row where the same asset ID and Fault description is found where the asset state returns to 'ok', I want to calculate the total alarm time based on the difference between when the asset ID and Fault description goes from 'Alarm' State to 'OK' state from DateandTime Column.

I want the result to be populated in a new worksheet that displays data with the following column headings as a result of the above calculations: Date, Asset ID, Asset Description, Fault Description, Alarm Time

I have added an additional column to show the type of output I am after.

There are up to 20,000 rows of data I want to perform the above calculation on.

A
B
C
D

[Code]....

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Aug 17, 2013

I'm calculating the difference in time:

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Now to convert this in minutes (in number format), I multiply this number with 1440:

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When I click the cell this number is actually 9.0000005, rather than exact 9. I need it to be exact 9 since I have to match this number from other excel sheet.

To sum up:

This is what I expect:

31.99999 should be changed to 32

10.000001 should be changed to 10.

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After I have formatted the cells to hh:mm:ss, the obvious thing to do would be : =(B1-A1)

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[Code] ........

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I have attached a sample of my spreadsheet to illustrate

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[code].....

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