Delta Electronics VFD-EL series User Manual

Revision 2016/03, 6ELE, V1.14
4-85
10.04
Derivative Control (D) Unit: 0.01
Settings 0.00 to 1.00 sec Factory Setting: 0.00
 This parameter specifies derivative control (rate of change of the input) and associated gain (D). With this
parameter set to 1, the PID output is equal to differential time x (present deviation − previous deviation). It
increases the response speed but it may cause over-compensation.
NOTE
The parameter can be set during operation for easy tuning.
10.05
Upper Bound for Integral Control Unit: 1
Settings
0 to 100 %
Factory Setting: 100
 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.
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
 This function in only for ACI signal.
 AC motor drive action when the feedback signals (analog PID feedback) are abnormal according to
Pr.10.16.

Delta Electronics VFD-EL series Specifications

General

Brand	Delta Electronics
Model	VFD-EL series
Category	Media Converter
Language	English