National Instruments NI-FBUS - Manual (Page 65)

Chapter 3 NI-FBUS Configurator Tutorials
© National Instruments Corporation 3-7 NI-FBUS Configurator User Manual
8. If you have not done so already, decrease the macrocycle so that the
loop is more responsive.
9. Download this new configuration and test by changing the setpoint
through the second AI block and observing the
SP (setpoint) and PV
(process value) parameters of the PID function block. You may want
to confirm the modes of each of the blocks for proper operation. If any
of the modes are incorrectly set, first try to use the mode buttons within
the function block configuration windows.
The proper modes should be as follows.
• First AI— Auto
• Second AI— Auto
• PID— Cas
• AO— Cas