data logging

I am trying to store pressure, velocity etc. in real numbers in Excel spreadsheets using Visual Basics with a time stamp. I need to update data every 30 minutes or set interval, not when data changes in the PLC. I wrote all the formulas in Excel to get the data from PLC to Excel spreadsheets. It is working. I have all the data in Row 12, and Row 11 is the heading for each column. I have some instructions in certain columns: A1-A10: Date and time; column B: PLC1 status(either 0 or 1); columns C thru G: data from PLC1; Column H: PLC2 Status ; columns I thru N: Data from PLC2. I need to copy row 12 every 30 minutes to consecutive rows. This happens if either PLC status is 1. I have a sample code that needs some modifications or a completely new code can be used. ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Deliverables must be in ready-to-run condition, as follows (depending on the nature of the deliverables): a) For web sites or other server-side deliverables intended to only ever exist in one place in the Buyer's environment--Deliverables must be installed by the Seller in ready-to-run condition in the Buyer's environment. b) For all others including desktop software or software the buyer intends to distribute: A software installation package that will install the software in ready-to-run condition on the platform(s) specified in this bid request. 3) All deliverables will be considered "work made for hire" under U.S. Copyright law. Buyer will receive exclusive and complete copyrights to all work purchased. (No GPL, GNU, 3rd party components, etc. unless all copyright ramifications are explained AND AGREED TO by the buyer on the site per the coder's Seller Legal Agreement). ## Platform Windows XP and Office 2002