IS300 Series Servo Drive User Manual Commissioning Procedure
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transducer of 0–10 VDC.
3.3.5 Setting of Pressure Relief (A3-08)
A3-08 indicates the motor's maximum reversed rotational sped at pressure relief. It is a
percentage to the maximum rotational sped (A3-01). The smaller the value, the slower the
pressure relief will be. The greater the value, the faster the pressure relief will be. But this
may cause pump reversal noise.
3.3.6 Min. Flow and Min. Pressure (A3-09, A3-10)
Because the pump has internal leakage, the hydraulic oil in the oil circuit oil tanks will reow
to the oil tank when the system gives no ow and pressure command. As a result, air enters
the oil circuit, causing system running noise and instability. Thus, you need to set the min.
ow (A3-09, a percentage of maximum rotational sped) and min. pressure (A3-10).
3.3.7 System Response (Oil Pressure PID Control)
The drive provides four groups of PID parameters. You can select a proper group according
to combination of input terminals DI2 and DI3, shown as below:
DI3 DI2 PID Group
0 0 1st group of PID parameters: A3-05, A3-06, A3-07
0 1 2nd group of PID parameters: A3-11, A3-12, A3-13
1 0 3rd group of PID parameters: A3-14, A3-15, A3-16
1 1 4th group of PID parameters: A3-17, A3-18, A3-19
For a faster system response, increase the proportional gain Kp, reduce the integral gain
Ki and lengthen the differential time Kd. Be aware that a fast system response will lead to
system oscillation, overshoot and instability.
Conversely, decreasing the proportional gain Kp, increasing the integral gain Ki and
shortening the differential time Kd the slower the response will be. This will lead to a
reduction in efficiency and unstable product quality.
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