User manual

Chapter 3 Software Overview

NI-DAQ User Manual for PC Compatibles 3-118 ni.com

Figure 3-44. Channel-Scanning Operation Using Modules in Multiplexed Mode

SCXI_Track_Hold_Setup

SCXI_SCAN_Setup

SCXI_Set_Gain

and/or

SCXI-Configure_Filter

SCXI_MuxCtr_Setup

Scanned Data Acquisition

SCXI_Track_Hold_Setup

Done?

Configure each SSH Module in the

module scan list for interval scanning.

Specify the module scan list, the start channel of each module,

and the number of channels to scan on each module.

Set the gain and/or filter settings of each SCXI-1100, SCXI-1102/B/C,

SCXI-1122, SCXI-1125, SCXI-1141, SCXI-1142, SCXI-1143, or

SCXI-1540 module in the module scan list.

Set up the Mux Counter on the DAQ device so that the total number

of samples to be taken in one scan on the DAQ device is equal to

the total number of channels in one scan of the module scan list.

Acquire the data using the

SCAN

Lab_ISCAN

functions.

Remember, if there are any SSH modules to be scanned,

you must use interval scanning.

Have you acquired all the data you need?

Disable the Track/Hold setup of the SSH modules

to free the counter resource on the DAQ device.

Yes