Delta Electronics AC Motor Drive VFD-EL - Manual (Page 145)

Chapter 4 Parameters|
4-102 Revision August 2008, 2ELE, V1.02
This parameter defines an upper bound or limit for the integral gain (I) and therefore limits the
Master Frequency.
The formula is: Integral upper bound = Maximum Output Frequency (Pr.01.00) x (Pr.10.05).
This parameter can limit the Maximum Output Frequency.
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 function in only for ACI signal.
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.