What is the difference between Lab_ISCAN and SCAN functions for DAQ?

[verieye]

I want to make a program that scans all 8 AI channels on my DAQCard-500 for voltages. What is the difference between the Lab_ISCAN_to_disk and SCAN_to_disk functions?

Thx

[Russell]

Thank you for contacting National Instruments!

The functions you are asking about are for two different generations of DAQ cards. So you should just use one of them.

Lab_ISCAN_to_Disk works for DAQCard-500/700 and 516, Lab and 1200 Series, and LPM devices only.

SCAN_to_disk works for MIO and AI devices only.

In fact this goes for all the functions starting with "Lab" and "SCAN". Chapter 3 of the NI-DAQ User Manual, has some really good flowcharts that are very helpful in determining the flow of function calls for specific applications and specific hardware. Hope this helps!

Best Regards,
Russell McMurtrey