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Chapter 2 Function Reference — AI_Change_Parameter
NI-DAQ FRM for PC Compatibles 2-2
©
National Instruments Corporation
• Pascal programmers—NIDAQCNS.PAS
Legal values for channel depend on the type of device you are using; analog input channels
are labeled 0 through n – 1, where n is the number of analog input channels on your device.
You can set channel to –1 to indicate that you want the same parameter selection for all
channels.
Note For the 611X devices, specify
ND_PFI_0
for channel when setting coupling of
the PFI_0 line for the analog trigger.
Legal values for paramValue depend on paramID. The following paragraph list features
you can configure along with legal values for paramID with explanations and corresponding
legal values for paramValue.
Channel Coupling
Some analog input devices have programmable AC/DC coupling for the analog input
channels. To change the coupling parameter, set paramID to
ND_AI_COUPLING.
Coupling Parameters
Using This Function
You can customize the behavior of the analog input section of your device by using this
function. Call this function before calling NI-DAQ functions that cause input on the analog
input channels. You can call this function as often as needed.
Device Type
Per Channel
Selection
Possible
Legal Range for
paramValue
Default Setting
PCI-6110E Yes ND_AC and ND_DC
ND_DC
PCI-6111E Yes ND_AC and ND_DC
ND_DC
PCI-445X Yes ND_AC and ND_DC
ND_AC
PCI-455X Yes ND_AC and
ND_DC
ND_AC