National Instruments NI-FBUS - Manual (Page 126)

Appendix B Troubleshooting and Common Questions
© National Instruments Corporation B-17 NI-FBUS Configurator User Manual
option of using a direct value rather than the PID-calculated value.
Which value you use depends on another parameter,
TRK_IN_D .
3. Now go to the Scaling tab. You need to set the quality of the TRK_IN_D
and TRK_VAL to Good_NonCascade . TRK_IN_D turns tracking on and
off. For normal PID operation, you want this value to be zero. To send
the
TRK_VAL directly to the PID output, you want this to be 1. Connect
the switch in Lookout to the TRK_IN_D.VALUE of the PID object.
The Pot should be connected to TRK_VAL.VALUE .
One other thing to be aware of is that the PID algorithm in the firmware
revision 1 of the FP-3000 device has a problem. Its
PV_SCALE must be
set to 0–100%. Other scaling options are ignored. Until this is
corrected in the firmware, a work-around is to simply use the percent
of scale value and set the
PV_SCALE of your AO block to be 0–100%
as well.
You may also need to set TRK_SCALE to 0–100%. You should probably
use whatever values come directly from the Pot object in Lookout as
long as you set TRK_SCALE appropriately. If you have troubles, try
doing the scaling of the Pot (making it 0–100%) in Lookout.
Open/Find Project
If you want to load a saved process file, choose Cancel in the Add Links
dialog box, which appears at startup. Then, choose File»Open. Otherwise,
the NI-FBUS Configurator will open a new file automatically, and you will
have too many windows to keep track of.
One thing that is often confusing is knowing which configuration tree you
are in. If you have multiple configuration files open and then open the
Function Block Application Editor window, you can often lose track of
which configuration file they are manipulating. Notice that the name of the
active file appears in the title bar. Choosing File»Close will close that file.
The additional windows (Schedule, Function Block Application Editor
window, and so on) to the right correspond to the active configuration file.
Using NIFB
If you need to shut down NIFB and restart, you do not have to shut down
the NI-FBUS Configurator. After restarting NIFB, you can reconnect by
right-clicking the link (the top level in the hierarchy) and selecting Online.