Powtran PI9000 series - Page 168

Chapter 5 Function parameter
162
MIN (|AI1|, |AI2|)
8
This parameter is used to select the process PID feedback signal channel.
The feedback value of process PID is also a relative value, the setting range is from
0.0% to 100.0%.
E2.03
PID action direction
Positive
0
0
☆
Negative
1
E2.04
PID reference
feedback range
0 to 65535
1000
☆
PID reference feedback range is a dimensionsless unit for PID setting display(d0.15)
and PID feedback display(d0.16).
The 100.0% of the relative value of PID reference feedback corresponds to a setting
feedback range(E2.04). If E2.04 is set to 2000, when PID setting is 100.0%, PID setting
display(d0.15) will be 2000.
E2.05
PID inversion
cutoff frequency
0.00 to F0.19(maximum
frequency)
0.00Hz
☆
In some cases, only when the PID output frequency is negative (i.e.the inverter
reverses), PID can control the reference value and the feedback value to the same states, but
the excessive inversion frequency is not allowed in some occasions, E2.05 is used to the
upper limit of determine inversion frequency.
E2.06
PID deviation limit
0.0% to 100.0%
0
☆
When the deviation between PID reference value and PID feedback value is less than
E2.06, PID will stop regulating action. Thus, when the deviation is lesser, the output
frequency will be stable, it is especially effective for some closed-loop control occasions.
E2.07
PID differential
limiting
0.00% to 100.00%
0.10%
☆
The role of the differential is more sensitive in PID regulator, is likely to cause system
oscillation, generally the role is limited to a smaller range, E2.07 is used to set PID
differential output range.
E2.08
PID reference
change time
0.00s to 650.00s
0.00s
☆
The PID reference change time means the required time that PID reference value
changes from 0.0% to 100.0%.
When the PID reference changes, the PID reference value will change linearly according
to the reference change time to reduce the adverse effects to the system caused by a sudden
reference change.
E2.09
PID feedback filter
time
0.00s to 60.00s
0.00s
☆
E2.10
PID output filter
time
0.00s to 60.00s
0.00s
☆
E2.09 is used for filtering the PID feedback quantity, the filter helps reduce the
influence of interference to the feedback quantity, but will bring the response performance of
the process closed loop system.