Delta VFD-V Series, User Manual

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5
VFD-V Series
DELTA ELECTRONICS, INC. ALL RIGHTS RESERVED
5-61
PD Control: when deviation occurred, the system will immediately generate some
operation load that is greater than the load generated single handedly by the D action to
restrain the increment of the deviation. If the deviation is small, the effectiveness of the
P action will be decreasing as well. The control objects include occasions with integral
component loads, which are controlled by the P action only, and sometimes, if the
integral component is functioning, the whole system will be vibrating. On such
occasions, in order to make the P action’s vibration subsiding and the system stabilizing,
the PD control could be utilized. In other words, this control is good for use with
loadings with no braking functions over the processes.
PID Control: Utilize the I action to eliminate the deviation and the D action to restrain the
vibration, thereafter, combine with the P action to construct the PID control. Use of the
PID method could obtain a control process with no deviations, high accuracies and a
stable system.
08-08 Detection Time of the Feedback Error
a
Factory setting 0.0
Settings 0.0~6000.0 Sec
This parameter defines the detection time for the loss of a feedback analog signal. The
drive will follow the operating procedure programmed in Pr.08-09 if the feedback signal
is lost for more than the time set in Pr. 08-08.
A setting of 0.0 disables this function.
08-09 Feedback Signal Fault Treatment
a
Factory setting 0
Settings 0 warn and keep operating
1 warn and RAMP to stop
2
warn and COAST to stop
This parameter selects the operation of the drive upon a loss of PID feedback signal.
08-10 Dwell (sleep) Frequency
a
Factory setting 0.00
Settings 0.00~400.00Hz
08-11 Revival Frequency
a
Factory setting 0.00
Settings 0.00~400.00Hz
08-12 Dwell (sleep) Period
a
Factory setting 0.0
Settings 0.0~6000.0 Sec