SANCH S3000 Series, User Manual

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5-60
1
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.
1
PID Control: Utilize the I action to eliminate the deviation and the Daction 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 Factory setting 0.0
Settings 0.0~6000.0
*
s
1
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.
1
A setting of 0.0 disables this function.
08-09
Feedback Signal Fault Treatment Factory setting 0
Settings 0 warn and keep operating
1 warn and RAMP to stop
2 warn and COAST to stop
1
This parameter selects the operation of the drive upon a loss of PID feedback signal.
08-10 Dwell (sleep) Frequency Factory setting 0.00
Settings 0.00~400.00Hz
08-11 Revival Frequency Factory setting 0.00
Settings 0.00~400.00Hz
08-12 Dwell (sleep) Period Factory setting 0.0
Settings 0.0~6000.0
*
s
1
These parameters determine Dwell (sleep) functions of the AC drive. If the command
frequency falls below the Dwell frequency, for the specified time in Pr. 08-12, then the
drive will shut off the output and wait until the command frequency rises above Pr. 08-11.