One of many ways is using Elapsed Time function. By setting the Time Target (s) to 5x60=300 (i.e. 5 minutes), the Elapsed Time function will set its Time Has Elapsed output to True at when the Time Target (s) is reached. The Elapsed Time function is then reset for next round... so on and so forth.
PS: attached is a quickly done up reference code. please try understand it and do the rest of the code i.e. DAQ etc. on your own.
Message Edited by ian fung on 12-09-2009 09:19 AM
