National Instruments NI-FBUS User 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
parameter description of Chapter 4,
, 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.