User manual

Chapter 3 Software Overview

Notice the similarities between Figure 3-43 and Figure 3-44,

which shows the corresponding application in parallel mode. The

SCXI_Track_Hold_Setup

calls and the

SCXI_Track_Hold_Control

calls are the same. In multiplexed mode, however, an

SCXI_Single_Chan_Setup

call is required to select the

multiplexed channel and appropriately route the output to the DAQ device

or SCXI-1200 module. The

SCXI_Change_Chan

call can change the

channel on the module either while the module is in hold mode or after

the module has been returned to track mode.

Figure 3-43 shows the function call sequence of a channel-scanning

application in multiplexed mode. Remember that only the MIO and

AI devices, the Lab-PC+, the SCXI-1200, and the DAQCard-1200

work with channel scanning in multiplexed mode. You can use any

combination of module types in a scanning operation. If any track-and-hold

modules are to be scanned, use interval scanning; if you are using a plug-in

DAQ device, the module directly connected to the DAQ device must be

one of the SSH modules.