User manual

Chapter 3 Software Overview
© National Instruments Corporation 3-121 NI-DAQ User Manual for PC Compatibles
When you use the SCXI-1200 module in parallel mode, you simply use the
AI
,
DAQ
, or
Lab_ISCAN
functions described earlier in this chapter with
the logical device number you assigned in Measurement & Automation
Explorer. You cannot use the SCXI-1200 to read channels from other
analog input modules that are configured for parallel mode.
The SCXI-1100, SCXI-1101, SCXI-1102/B/C, VXI-SC-1102/B/C,
SCXI-1104/C, SCXI-1112, SCXI-1122, and SCXI-1540 operate in
multiplexed mode only.
The SCXI-1140, SCXI-1520, SCXI-1530, and SCXI-1531 modules
require the use of SCXI functions to configure and control the Track/Hold
state of the module before you can use the
AI
,
DAQ
,
SCAN
,and
Lab_ISCAN
functions to acquire the data. Figure 3-45 shows the function call sequence
of a single-channel (or software-scanning) operation using these modules
in parallel mode.