HNC Electric HV590 Series, User Manual

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102
Section V. Parameter Function Table
Differential time Td
1
：
determines the degree of adjustment that PID regulator performs on the
derivation between PID feedback value and reference value.Differential time means that if the feedback
value changes100% within this time, the adjustment by the differential regulator (proportional effect and
differential effect are omitted) will reach the maximum frequency.The longer differential time is, the higher
the degree of adjustment will be.
PA.08
PID cutoff frequency of
reverse rotation
0.00~maximum frequency
2.00Hz
☆
In some cases, only when the frequency of the PID output is negative (i.e., frequency inversion ) could
PID put the reference and feedback to the same state. High inversion frequency is not allowed in some
certain cases, PA.08 is used to determine reverse frequency upper limit.
PA.09 PID deviation limit
0.0%~100.0% 0.0%
☆
It is used to set the maximum allowable deviation between the system feedback value and reference
value. When the deviation between the PID feedback and reference is within this range, the PID stops
adjustment. The deviation limit is calculated according to the percentage of the PID setup source (or
feedback source).When deviation between reference value and the feedback value is small,output
frequency is stability constant.It’s especially effective for some closed loop control occasions.
PA.10
PID differential amplitude
limit
0
．
00%~100.00%
0.10%
☆
In PID regulation, the role of differential is relatively sensitive that system oscillation may be easily
caused. Therefore, range of PID differential regulation has been limited to a small range. PA.10 is used to
set PID differential output range.
PA.11
PID reference change duration 0.00s~650.00s
0.00s
☆
PID reference changes according to this parameter value, which corresponds to the time taken for the
PID reference to change from 0% to 100%.
When PID reference changed,PID given value linear changes in accordance with given time,which can
reduce system adverse effect caused by given mutation.
PA.12 PID feedback filter time
0.00s~60.00s
0.00s
☆
PA.13 PID output filter time
0.00s~60.00s
0.00s
☆
PA.12 is used for filtering of PID feedback. The filtering helps to reduce the influence of the feedback
interference, but brings response performance of process closed-loop system.
PA.13 is used for filtering of PID output frequency. The filtering helps to reduce the mutations of the
output frequency, but brings response performance of process closed-loop system.
PA.14 Reserved - - -
PA.15
Proportional gain K
p2
0.0~100.0
20.0
☆
PA.16
Integration time Ti
2
0.01s~10.00s
2.00s
☆
PA.17
Differential time Td
2
0.00~10.000
0.000s
☆
PA.18
PID parameter switching
condition
No switching
0
0
☆ Switching through DI terminal
1
Switching through deviation
2
PA.19
PID parameter switching
deviation1
0.0%~PA.20
20.0%
☆