Delta VFD185B43A User Manual

5
VFD-B Series
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5-69
10 - 04
Derivative Control (D)
Factory Setting: 0.00
Settings 0.00 to 1.00 sec
 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.
10 - 05
Upper Bound for Integral Control
Factory Setting: 100
Settings 00 to 100 % Unit: 1 %
 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
Factory Setting: 0.0
Settings 0.0 to 2.5 sec Unit: 0.1 sec
 (1) To avoid amplification of measurement noise in the controller output, a derivative
digital filter is inserted. This filter helps in smoothing oscillations.
(2) When Pr.02-01 is set to 01 or 02, the set point (Master Frequency) for PID control is
obtained from the AVI external terminal (0 to +10V) or from multi-step speed. When
Pr.02-01 is set to 00, the set point is obtained from the keypad.
The complete PID diagram is the following:
P
10-02
I
10-03
D
10-04
10-05
10-01
10-07
10-06
10-00
+
-
+
+
+
Setpoint
Input Freq.
Gain
PID
feedback
Integral
gain
limit
Output
Freq.
Limit
Digital
filter
Freq.
Command
10 - 07
PID Output Frequency Limit
Factory Setting: 100
Settings 00 to 110 % Unit: 1%
 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.

Delta VFD185B43A Specifications

General

Brand	Delta
Model	VFD185B43A
Category	DC Drives
Language	English