Chapter 5
Programming
© National Instruments Corporation
5-5
SCXI-1100 User Manual
To measure the voltage on the MTEMP line, perform the following steps:
1. Perform any necessary programming to ensure that no modules are driving Analog Bus 0.
For an SCXI-1100, clear AB0EN in the Configuration Register to ensure that its output is not
driving AB0.
2. Program the other module not to drive Analog Bus 0, but to send Analog Bus 0 to the data
acquisition board.
3. Write the binary pattern
XXX00000 00XXXXXX 00101010
to the SCXI-1100
Configuration Register.
4. Measure the voltage with the data acquisition board.
To measure the output of the amplifier in the Calibration mode, perform the following steps:
1. Perform any necessary programming to ensure that no modules are driving Analog Bus 0.
For an SCXI-1100, clear AB0EN and/or set FOUTEN* in the Configuration Register.
2. Program the other module not to drive Analog Bus 0, but to send Analog Bus 0 to the data
acquisition board.
3. Write the binary pattern
XXXGGGGG 00XXXXXX 1M001010
to the SCXI-1100
Configuration Register where:
M
=
0
if the amplifier inputs are to be grounded.
M
=
1
if the amplifier inputs are to be connected to Analog Bus 2.
4. Measure the voltage with the data acquisition board.
Scanning Measurements
Programming for scanned data acquisition involves programming your data acquisition board,
modules, and Slot 0. In general, the steps to be taken are as follows:
1. Perform all data acquisition board programming to the point of enabling the data
acquisition.
2. Perform all module programming.
3. Program the Slot 0 hardscan circuitry.
4. Enable the data acquisition, trigger it either through software or hardware, and service the
data acquisition.
You can only channel scan with MIO boards. The Lab boards and the PC-LPM-16 board do not
support channel scanning.
