Delta Electronics AC Motor Drive VFD007S23A User Manual page 131

Chapter 5 Parameters|VFD-S Series
When this parameter is set to gain =1, PID output is Derivative time. At this time, error value –
error value of the preceding item= additional respond speed and it is easy to have over
compensation situation.
A-05 Upper Bound for Integral Control
Settings
This parameter determines the Upper Bound for Integral Control while operating in the PID
feedback loop. (Limit = 1-00×A-05 %). During a fast Integration response, it is possible for
the frequency to spike beyond a reasonable point. This parameter will limit this frequency
spike.
A-06
Primary Delay Filter Time
Settings
Primary Delay Filter Time will slow down oscillation of the system.
A setting of d0 disables this function.
A-07
PID Output Frequency Limit
Settings
This parameter determines the limit of the PID output frequency. If this parameter is set to
110%, then the maximum output frequency while in the PID operation will be (110% x Pr.01-
00) 66Hz.
Feedback Signal Detection Time
A-08
Settings
This parameter defines the detection time for the loss of a feedback analog signal. The drive
will follow the operating procedure programmed in Pr.A-09 if the feedback signal is lost for
more than the time set in Pr. A-08.
A setting of 0.0 disables this function.
A-09 Treatment of the Erroneous Feedback Signals
Settings
5-76
d0 to d100%
d0 to d999
d0 to d110%
d0.0 to d650 seconds
d0 Warning and RAMP to stop
d1 Warning and COAST to stop
Factory Setting: d100
Factory Setting: d0
Factory Setting: d100
Factory Setting: d0.0
Factory Setting: d0
Revision August 2006, SE08, SW V2.61
Unit: 1
Unit: 2 msec
Unit: 1
Unit: 0.1