National Instruments Welding System 321645c-01 Manual De Usuario

Chapter 2

Function Reference — SCXI_Change_Chan

NI-DAQ FRM for PC Compatibles

2-332

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 National Instruments Corporation

Selects a new channel of a multiplexed module that you have previously set up for a 
single-channel analog input operation using the 

SCXI_Single_Chan_Setup

 function.

moduleChan is the channel number of the new input channel on the module that is to be read.

Range:

0 to n–1, where n is the number of input channels on the module.

–1:

Set up to read the temperature sensor on the terminal block connected to the 
module if the temperature sensor is in the MTEMP configuration.

It is important to realize that this function affects only the channel selection on the module. 
It does not affect the module output enable or any analog signal routing on the SCXIbus; 
the

SCXI_Single_Chan_Setup

 function is required to do that. 

SCXI_Change_Chan

 can 

be very useful in applications like those shown in Chapter 3, Software Overview, of the 
NI-DAQ User Manual for PC Compatibles, especially when you are trying to read several 
channels on a module in a loop at relatively high speeds. However, you will need to call 

SCXI_Single_Chan_Setup

 again to select a channel on a different module.

i16

logical ID assigned to the SCXI chassis

i16

chassis slot number of the module

i16

channel number