DAQ VXI-SC-1102 Bedienerhandbuch PDF herunterladen (Seite 95)

Chapter 14 SCXI Hardware

National Instruments Corporation 14-21 DAQ Hardware Overview Guide

Lab and 1200 Devices (Except Parallel Port Devices)

These DAQ devices support the following analog input functionality when

using the SCXI analog input modules:

• Single-channel analog input using the analog input functions described

in Chapter 3, Software Overview, of the NI-DAQ User Manual for PC

Compatibles.

• Single-channel data acquisition using the data acquisition functions

described in Chapter 3, Software Overview, of the NI-DAQ User

Manual for PC Compatibles.

• The Lab and 1200 devices support continuous and interval scanning on

all analog input modules in both multiplexed and parallel mode.

It is important to remember that when a DAQ device is cabled to an SCXI

module, some of the device resources will be reserved for SCXI use. The

following resources are reserved by SCXI:

• Lab and 1200 devices digital I/O lines PB4 to PB7 are used as output

communication lines to SCXI. If the SCXI-1200 is the only module in

the chassis, these communication lines are not needed, and they are not

reserved by NI-DAQ.

• Lab and 1200 devices digital I/O line PC1 is used as an input

communication line to SCXI. The remaining lines of these ports are

available for input only. If the SCXI-1200 is the only module in the

chassis, these communication lines are not needed, and they are not

reserved by NI-DAQ.

• When you use an SCXI-1140 module, counter B1 of the Lab or

1200 devices controls the track/hold state of the module. When the

module is not set up for an input operation, these counters are available

for general use; otherwise, they are reserved. Refer to the

SCXI_Track_Hold_Setup function description in the NI-DAQ

Function Reference Online Help for more information.

• The SCXI-1100 module drives analog input channel 0 of the DAQ

device; if you use the SCXI-1300 terminal block with the temperature

sensor in the DTEMP configuration, the SCXI-1100 also drives analog

input channel 1. The SCXI-1200 cannot read the temperature sensor in

DTEMP mode because it reads all analog voltages off the analog lines

of the SCXIbus backplane.

• The SCXI-1120, SCXI-1120D, and SCXI-1125 modules drive analog

input channels 0 to 7, even if you are operating the module in

multiplexed mode. In addition, if the temperature sensor on the

terminal block is in the DTEMP configuration, the SCXI-1120 also

drives analog input channel 15. Notice that a Lab or 1200 device

1 2 ... 90 91 92 93 94 95 96 97 98 99 100 ... 150 151

Keine Kommentare

DAQ VXI-SC-1102 Bedienerhandbuch Seite 95