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Chapter 2
Function Reference — SCXI_Track_Hold_Setup
NI-DAQ FRM for PC Compatibles
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National Instruments Corporation
SCXI_Track_Hold_Setup
Format
status = SCXI_Track_Hold_Setup (SCXIchassisID, moduleSlot, inputMode, source, send,
holdCount, DAQdeviceNumber)
Purpose
Establishes the track/hold behavior of an SCXI-1140 module and sets up the module for either
a single-channel operation or an interval-scanning operation.
a single-channel operation or an interval-scanning operation.
Parameters
Input
Parameter Discussion
inputMode indicates what type of analog input operation.
0:
None; frees any resources that were previously reserved for the module
(such as a DAQ device counter or an SCXIbus trigger line).
(such as a DAQ device counter or an SCXIbus trigger line).
1:
Single-channel operation.
2:
Interval channel-scanning operation (only supported if the DAQdeviceNumber
specified is an MIO or AI device, Lab-PC-1200, Lab-PC-1200AI, Lab-PC+,
SCXI-1200, or DAQCard-1200).
specified is an MIO or AI device, Lab-PC-1200, Lab-PC-1200AI, Lab-PC+,
SCXI-1200, or DAQCard-1200).
Name
Type
Description
SCXIchassisID
i16
logical ID assigned to the SCXI chassis
moduleSlot
i16
chassis slot number
inputMode
i16
type of analog input operation
source
i16
indicates which signal will control the
track/hold state
track/hold state
send
i16
where else to send the signal specified by
source
source
holdCount
i16
number of times the module is enabled during
an interval scan before going back into track
mode
an interval scan before going back into track
mode
DAQdeviceNumber
i16
device number of the DAQ device used