Chapter 4: AC Drive Parameters
Page 4–167
DURApulse GS4 AC Drive User Manual – 1st Ed, Rev A - 10/20/2017
Type Hex Addr Dec Addr
P7.16 Upper Limit for Integral Time
♦R/W 0710 41809
Range/Units (Format: 16-bit unsigned) Default
0�0~100�0%
100�0
This parameter defines an upper limit for the Integral Time (I), and therefore limits the Master
Frequency.
•
Integral upper limit = Maximum Output Frequency (P0�04) x Upper Limit for Integral Time (P7�16)�
An integral value that is too high will slow the system response due to sudden load changes, and
therefore may cause motor stall or machine damage. Therefore, use caution when setting this
parameter.
Type Hex Addr Dec Addr
P7.17 Derivative Filter Time Constant
♦R/W 0711 41810
Range/Units (Format: 16-bit unsigned) Default
0�0~2�5 sec
0�0
To avoid amplification of measured noise in the controller output, a digital filter is inserted. This
filter helps smooth oscillations. Larger values for P7.17 provide more smoothing.
Type Hex Addr Dec Addr
P7.18 PID Output Frequency Limit
♦R/W 0712 41811
Range/Units (Format: 16-bit unsigned) Default
0�0~100�0%
100�0
This parameter defines the percentage of output frequency limit during PID control.
•
Output frequency limit = Maximum Output Frequency (P0�04) x PID Output Frequency Limit
(P7�18)�
Type Hex Addr Dec Addr
P7.19 PID Feedback Value
Read 0713 41812
Range/Units (Format: 16-bit signed) Default
-200�00% to +200�00%
0�00
This parameter shows the value of feedback signal under PID control.
Type Hex Addr Dec Addr
P7.20 Feedback Signal Detection Time
♦R/W 0714 41813
Range/Units (Format: 16-bit unsigned) Default
0�0~3600�0 sec
0�0
This parameter is valid only when the feedback signal is AI2 4~20mA.
This parameter defines the time during which the PID feedback must be abnormal before a
warning 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 signal abnormality.
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