MicroTrans
II
Summing Operation & Maintenance Manual
Paragon Controls Incorporated
2
Revision Level 002
-
Inverse Derivative (1/D):
The function of the 1/D parameter is to filter out the noise by
delaying the controller response for a specific time period and then give a quick boost to
the control output signal. The 1/D function helps improve response and stability of the
control loop. The 1/D adjustment range is 1 to 300 seconds. Decreasing the 1/D value
will cause the controller’s response to speed up.
1.3.2. Correctly Tuned Control Loop
A correctly tuned control loop will respond to an error change quickly and return the process to the
setpoint value with minimum overshoot and oscillation, referred to as a critically damped or tuned
system (See Figure 1). The three control parameters operate in concert with each other, however each
has a specific roll in controller response.