Question

Make the block diagram (Software LabView) of two control sequence programs involving binary type signals (Digital), whole type (analog) signals, which contain counting process. The outputs can be light indicators. Note: The purpose of the program is to observe in LabView how signals work. The programs can be the one you want.

Answer 1

PID Control in LabVIEW:

Typical Block Diagram:

r – Reference Value,

SP (Setpoint), SV (Set Value)

y – Measurement Value (MV),

Process Value (PV)

e – Error between the reference value and the measurement value (e = r – y)

v – Disturbance, makes it more complicated to control the process

Kp, Ti, Td – PID parameters

Control System implementation in LabVIEW :

PID Control in LabVIEW:

Alternative 1:

PID Palette in LabVIEW (PID Toolkit)

Alternative 2:

Note! The functions “PID.vi” and “PID Advanced.vi” requires that Ti and Td are in minutes, while it’s normal to use seconds as the unit for these parameters. You can use the following piece of code in order to transform them: This means we enter values for Ti and Td in secons on the Front Panel and the values are converted to minutes in the code.

LabVIEW PID Example