Delta Electronics AC Motor Drive VFD-E - Manual (Page 187)

Chapter 4 Parameters|
4-134 Revision June 2008, 04EE, SW--PW V1.11/CTL V2.11
10.06 Primary Delay Filter Time Unit: 0.1
Settings 0.0 to 2.5 sec Factory Setting: 0.0
To avoid amplification of measurement noise in the controller output, a derivative digital filter is
inserted. This filter helps to dampen oscillations.
The complete PID diagram is in the following:
P
10.02
I
10.03
D
10.04
10.05
10.10
10.07
10.06
10.01
+
-
+
+
+
Setpoint
Input Freq.
Gain PID
feedback
Integral
gain
limit Output
Freq.
Limit
Digital
filter
Freq.
Command
10.07
PID Output Frequency Limit
Unit: 1
Settings 0 to 110 % Factory Setting: 100
This parameter defines the percentage of output frequency limit during the PID control. The
formula is Output Frequency Limit = Maximum Output Frequency (Pr.01.00) X Pr.10.07 %.
This parameter will limit the Maximum Output Frequency. An overall limit for the output
frequency can be set in Pr.01.07.
10.08 PID Feedback Signal Detection Time Unit: 0.1
Settings 0.0 to d 3600 sec Factory Setting: 60.0
This parameter defines the time during which the PID feedback must be abnormal before a
warning (see Pr.10.09) is given. It also can be modified according to the system feedback
signal time.
If this parameter is set to 0.0, the system would not detect any abnormality signal.
10.09 Treatment of the Erroneous Feedback Signals (for PID feedback error)
Factory Setting: 0
Settings 0 Warning and RAMP to stop
1 Warning and COAST to stop
2 Warning and keep operating