Pid Control - Veikong gpd 515/g5 Startup Manual

5 . 3 6 P I D C O N T R O L
The Proportional, Integral and Derivative control function provides closed-loop control, or
regulation, of a system process variable (pressure, temperature, etc.). This regulation is
accomplished by comparing a feedback signal to a setpoint reference, which results in an
error signal. The PID control algorithm then performs calculations, based upon the PID
parameter settings ( b 5 - 0 1 thru b 5 - 1 4 ), on this error signal. The result of the PID
algorithm is then used as the new frequency reference, or is added to the existing speed
reference.
A . b 5 - 0 1 : PID Selection
Using this parameter, PID control can be enabled, and the type of PID control can be
selected.
Setting
0
1
2
3
4
Description
PID Disabled
PID Enabled (D = Feedback)
PID Enabled (D = Feed forward)
PID Enabled, Reference + PID (D = Feedback)
PID Enabled, Reference + PID (D = Feedback forward)
5-78
Factory setting: 0
Range: 0 to 4