National Instruments Welding System 321645c-01 Manual De Usuario

Chapter 2

Function Reference — SCXI_MuxCtr_Setup

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 National Instruments Corporation

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NI-DAQ FRM for PC Compatibles

Enables or disables a DAQ device counter to be used as a multiplexer counter during SCXI 
channel scanning to synchronize the DAQ device scan list with the module scan list that 
NI-DAQ has downloaded to Slot 0 of the SCXI chassis.

enable indicates whether to enable a device counter to be a mux counter for subsequent SCXI 
channel scanning operations.

0:

Disable the mux counter; the device counter is freed.

1:

Enable the device counter to be a mux counter.

scanDiv indicates whether the mux counter will divide the scan clock during the acquisition.

0:

The mux counter does not divide the scan clock; it simply pulses after every n 
mux-gain entry on the DAQ device, where n is the ctrValue. The mux counter 
pulses are currently not used by the SCXI chassis or modules, so this mode is not 
useful.

1:

The mux counter divides the scan clock so that n conversions are performed for 
every mux-gain entry on the DAQ device, where n is the ctrValue.

ctrValue is the value NI-DAQ will program into the mux counter. If enable = 1 and 
scanDiv =1, ctrValue is the number of conversions NI-DAQ will perform on each mux-gain 
entry on the DAQ device. If enable = 0, NI-DAQ ignores this parameter.

i16

assigned by configuration utility

i16

whether to enable counter 1 to be a mux counter

i16

whether the mux counter will divide the scan 
clock

u16

value to be programmed into the mux counter