Chziri ZVF200-M User Manual page 59

deviation is small, the effectiveness of the P-action decreases as well.
In some cases, control systems include 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. In such
cases, a PD control could be used to lower the Paction's vibration and
to stabilize the system. In other words, this control is good for use if
the loads have no braking functions over the process.
PID Control: Uses the I-action to eliminate the deviation and the D-
action to restrain the vibration, and combine with the P action to
construct the PID control. The PID control method normally determines
a control process with no deviations, high accuracy and very stable.
PID Frequency Output Command limit
P 122
Settings
00 to 110 %
This parameter sets a limit of the PID Comman d freque ncy. If this
parameter is set to 20%, then the maximum output frequency for the
PID operation will be (20% P03).
P 123 Feedback Signal Detection Time
0.0:disable
Settings
0.1 3600s
This parameter defines the detection time for the loss of a feedback
analog signal. The drive will follow the operating procedure programmed
in P124 if the feedback signal is lost for more than the time set in P123.
P 124 Feedback Signal Fault Treatment
00 Warning and RAMP to stop
Settings
01 Warning and keep operating
This parameter selects the operation of the drive upon a loss of the
PID feedback signal.
-112-
Chapter 6 Parameters
Factory Setting
100
Factory Setting
60.0
Factory Setting
00
Source of PID Set point
P 125
Settings
0.00 to 400.0Hz
This parameter is used in conjunction with P115 (04) to input a se t
point in Hz.
P 126 PID Offset Level
Settings
1.0 to 50.0 %
This parameter is used to set the offset between set point and feedback.
P 127
Detection Time of PID Offset
Settings
0.1 to 300.0 sec
This parameter is used to set the detection time of PID offset.
P 128
Minimum Reference Value
Settings
0.0 to 10.0 V
This parameter is used to set the AVI input voltage that corresp onds to
minimum frequency.
P 129 Maximum Reference Value
Settings
0.0 to 10.0 V
This parameter is used to set the AVI input voltage that corresponds to
maximum frequency.
Invert Reference Signal A VI (0-10V)
P 130
00 Not Inverted
Settings
01 Inverted
If this parameter is set to 01, the reference signal is inverted: 0V
corresponds to 50Hz in P128 and 10V corresponds to 0Hz in P129.
-113-
Chapter 6 Parameters
Factory Setting
0.00
Factory Setting
10.0
Factory Setting
5.0
Factory Setting
0.0
Factory Setting
10.0
Factory Setting
00