Eaton PowerXL DF1 Series User Manual

1925. Parameter DescriptionEaton Electric General Inverters DF1 Series UMXXXXXXXXE February 2020 www.eaton.com5.9.3 PID parameter group 2• This group of parameters is only related to the close loop speed mode.Parameter Name FactoryValue Setting Range Content08-20P.641 PID proportion Gain P2 20.0% 0.1%~1000.0% This gain determines the proportion controller’s impact onfeedback deviation. The greater the gain, the faster the im-pact. Yet a gain that is too big will cause vibration.08-21P.642 Integral time I2 1.00s 0~60.00sThis parameter is use to set integral controller’s integraltime. When the integral gain is too big, the integral effectwill be too weak to eliminate steady deviation. When theintegral gain is too small, the system vibration frequencywill increase, and therefore the system may be unstable.08-22P.643 Differential time D2 0ms 0~10000msThis gain determines differential controller’s impact on theamount of change of the deviation. Appropriate differentialtime can reduce the overshooting between the proportioncontroller and the integral controller. Yet when thedifferen-tial time is too large, system vibration may be induced.08-23P.644Auto adjustment for PIDparameters 00 Adjust according to the feedback deviation value1 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 forempty roll, while the second group of PID parameters is used for full roll. The PID parameters change continuouslyduring the process.3. When 08-23=2, the adjustment is according to the operation frequency. This first group of PID parameters is usedupon zero speed, while the second group of parameters is used upon maximum frequency. The PID parameterschange 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 uponzero speed, while the second group of parameters is used upon maximum line speed. The PID parameters changecontinuously during the process.• The relationship between PID auto adjustment basis and PID parameters is shown as following diagram:Auto adjustment basisfor PID parametersPID ParanetersP641/P642/P643P172/P173/P174The minimumadjustment basisAdjustment basisduring the processThe maximumadjustment basisD changes from P.174 to P.643 linearlyI changes from P.173 to P.642 linearlyP changes from P.172 to P.641 linearly