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Chapter 6 PA Process control PID
PA-05
Proportional gain Kp1
0.0
~
100.0
Default
:
20.0
PA-06
Integration time Ti1
0.01s
~
10.00s
Default
:
2.00s
PA-07
Derivative time Td1
0.000s
~
10.000s
Default
:
0.000s
Proportional gain Kp1:
Determine the adjustment strength of the entire PID regulator, the larger the Kp1, the
greater the adjustment intensity. The parameter 100.0 indicates that when the deviation
between the PID feedback amount and the given amount is 100.0%, the adjustment
range of the PID regulator to the output frequency command is the Maximum frequency.
Integration time Ti1: Determines the strength of the PID regulator integral adjustment. The
shorter the integration time, the greater the adjustment intensity. The integration time
means that when the deviation between the PID feedback amount and the given amount
is 100.0%, the integral regulator continuously adjusts through the time, and the
adjustment amount reaches the Maximum frequency.
Derivative time Td1: Determines the strength of the PID regulator's adjustment to the rate
of change of the deviation. The longer the differentiation time, the greater the
adjustment intensity. The derivative time means that when the feedback amount changes
by 100.0% during this time, the adjustment amount of the differential regulator is the
Maximum frequency.
PA-08
PID reverse cutoff
frequency
0.00
~
Maximum frequency
Default
:
2.00Hz
In some cases, only when the PID output frequency is negative (ie, the inverter is
reversed), it is possible for the PID to control the given amount and the feedback amount
to the same state, but the excessive reverse frequency is not allowed for some occasions.
PA-08 is used to determine the upper limit of the inversion frequency.
PA-09
PID deviation limit
0.0%
~
100.0%
Default
:
0.0%
PWhen the deviation between the PID given amount and the feedback amount is smaller
than PA-09, the PID stops the adjustment action. In this way, the output frequency is
stable when the deviation from the feedback is small, which is effective for some
closed-loop control applications.
PA-10
PID differential
limiting
0.00%
~
100.00%
Default
:
0.10%
In the PID regulator, the function of the differential is relatively sensitive, and it is easy to
cause the system to oscillate. For this reason, the role of the PID differential is generally
limited to a small range, and the PA-10 is used to set the range of the PID differential output.
PA-11
PID given change
time
0.00
~
650.00s
Default
:
0.00s
PID given change time, refers to the time required for the PID reference value to change
from 0.0% to 100.0%.
When the PID given changes, the PID set value changes linearly according to the given
change time, which reduces the adverse effect of the given sudden change on the
system.