rotation speed which is the motor rotation speed corresponds to flow
command one hundred percent.
b)A3-02˖System oil pressure. Set system maximum pressure.
c) A3-03: Maximum oil pressure. Set the pressure scale of pressure
sensor.
3.3.5
Pressure relief setup˄A3-08˅˖
A3-08˖It is the maximum reverse rotation speed when pressure relief, which
corresponds to the percentage setup of maximum rotation speed. It is used to
set the maximum reverse rotation speed. The greater setup value is, the faster
pressure relief will be, but excessive noise cause pump reversal. The smaller
setting value is, the slower pressure relief will be.
3.3.6
Minimum Flow and Minimum Pressure˄A3-09ǃA3ˉ10˅˖
Due to oil pump exists internal leakage, the system is not given flow and
pressure command, the hydraulic oil in oil circuit oil tanks will reflow to the oil
tank, then it will cause the air enters the oil circuit, resulting in a system running
noise and unstable. So you need to set a certain minimum Flow (A3-09,
corresponding the percentage of maximum rotation speed setup) and
minimum pressure (A3-10).
3.3.7
System response˄Oil pressure PID control˅
The drive provides four groups PID, according to the input terminals of the DI2
and DI3 combination selection, the corresponding selection is as follows.
Table 7-2 PID Combination Selection
DI3 DI2 Group PID
0 0
The first group PID:
A3-05,A3-06,A3-07
0 1
The second group PID:
A3-11,A3-12,A3-13
1 0
The third group PID:
A3-14,A3-15,A3-16
1 1
The fourth group PID:
A3-17,A3-18,A3-19
The greater proportional gain Kp is, the smaller integration time Ki will be, and
the larger derivative time Kd is, the faster response will be. Response too
quickly can easily lead to overshoot and cause system instability and running
oscillation.
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