Eaton PowerXL DF1 Series, User Manual

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5. Parameter Description
Eaton Electric General Inverters DF1 Series UMXXXXXXXXE February 2020 www.eaton.com
5.9.3 PID parameter group 2
• This group of parameters is only related to the close loop speed mode.
Parameter Name
Factory
Value
Setting Range Content
08-20
P.641
PID proportion Gain P2 20.0%
0.1%~1000.0%
This gain determines the proportion controller’s impact on
feedback deviation. The greater the gain, the faster the im-
pact. Yet a gain that is too big will cause vibration.
08-21
P.642
Integral time I2 1.00s 0~60.00s
This parameter is use to set integral controller’s integral
time. When the integral gain is too big, the integral effect
will be too weak to eliminate steady deviation. When the
integral gain is too small, the system vibration frequency
will increase, and therefore the system may be unstable.
08-22
P.643
Differential time D2 0ms 0~10000ms
This gain determines differential controller’s impact on the
amount of change of the deviation. Appropriate differential
time can reduce the overshooting between the proportion
controller and the integral controller. Yet when thedifferen-
tial time is too large, system vibration may be induced.
08-23
P.644
Auto adjustment for PID
parameters
0
0 Adjust according to the feedback deviation value
1 Adjust according to the curling radius.
2 Adjust according to the operation frequency.
3 Adjust according to the line speed.
PID parameter group2
• 08-23 is the auto adjustment basis for PID parameters.
1. When 08-23=0, he adjustment is according to the feedback deviation value.IOnly the first group of PID param-
eters is used, and the second group is inactive.
2. When08-23=1, the adjustment is according to the curling radius. The first group of PID parameters is used for
empty roll, while the second group of PID parameters is used for full roll. The PID parameters change continuously
during the process.
3. When 08-23=2, the adjustment is according to the operation frequency. This first group of PID parameters is used
upon zero speed, while the second group of parameters is used upon maximum frequency. The PID parameters
change continuously during the process.
4. When 08-23=3, the adjustment is according to the line speed. This first group of PID parameters is used upon
zero speed, while the second group of parameters is used upon maximum line speed. The PID parameters change
continuously during the process.
• The relationship between PID auto adjustment basis and PID parameters is shown as following diagram:
Auto adjustment basis
for PID parameters
PID Paraneters
P641/P642/P643
P172/P173/P174
The minimum
adjustment basis
Adjustment basis
during the process
The maximum
adjustment basis
D c
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P.
174
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P.
643
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I ch
ang
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rom
P.
173
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P.
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P c
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P.
172
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P.
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