Inovance IS580 Series - Page 53

IS580 User Manual Chapter 4 Servo Pump Commissioning
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Oil Pressure Overshoot Suppression (A3-27/A4-16, A3-28/A4-17)
This function is used for pressure overshoot suppression at high speed.
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Overshoot suppression detection level (A3-27/A4-16)
The larger the value of the parameter is, the later the overshoot suppression starts, the poorer the suppression
effect becomes, and the bigger the overshoot will be. The smaller the value is, the sooner the overshoot
suppression starts, and the better the suppression effect and the smaller the overshoot will be.
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Overshoot suppression Coefcient (A3-28/A4-17)
The larger the value of the parameter is, the better the suppression effect will be. But too large value will cause
the pressure curve to be unsmooth. The smaller the value is, the poorer the suppression effect becomes and
the bigger the overshoot will be.
Figure 4-15 Overshoot suppression
P oil pressure
reference
Without
overshoot
suppression
With overshoot
suppression
Time
Oil
pressure
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Oil Pressure Loop PID Response Gain (A3-29)
It is used to adjust the response of the entire hydraulic loop. The larger the gain is, the faster the response is;
however, this will cause system oscillation. The smaller the gain is, the slower the response is.
Reduce the gain when the inertia of the hydraulic system is large or the oil pipe is slim.
4.3.5 Commissioning of Pressure Holding Stability
If the holding pressure uctuates greatly during commissioning, increase the low-speed loop response; that is,
increase the value of F2-00 and decrease the value of F2-01. Note that these two parameters must be modied
properly to avoid motor oscillation.