National Instruments NI-FBUS - Manual (Page 61)

Chapter 3 NI-FBUS Configurator Tutorials
© National Instruments Corporation 3-3 NI-FBUS Configurator User Manual
7. In the block configuration window, select the Scaling tab.
8. Confirm the scaling parameters in particular and check that the other
parameters are reasonable.
9. To change a parameter, place your mouse over the existing value and
click. Then, enter values appropriate for your device, as shown in the
following example.
XD_SCALE
EU_100 50
EU_0 –50
Units_Index mV
Decimal 3
OUT_SCALE
EU_100 400
EU_0 –100
Units_Index °C
Decimal 3
L_TYPEindirect
Note Selecting an L_TYPE of direct results in no further scaling of the transducer value
(that is, OUT_SCALE is ignored). Normally, some type of output scaling is desirable, in
which case one of the indirect L_TYPES should be chosen. Refer to the L_TYPE (Scaling)
parameter description of Chapter 4, Parameters , for more information.
10. When you are ready to write all the new values, click the Write
Changes button at the bottom of the window.
If you have already downloaded the configuration, you might get a
warning telling you that the block is in the wrong mode for the request.
This is because some devices allow certain parameters to be written
only in
OOS mode. Acknowledge the warning and click the OOS
button. Allow a few seconds for the device to get into OOS mode before
clicking Write Changes again. After the changes have been written,
change the block back to its original mode. Another common cause for
warnings when writing changes is trying to write an invalid value to a
parameter. Devices will refuse values that are out of range. To correct
this problem, note the parameter that caused the warning and change it
to an appropriate value.