Chapter 4 Description of Parameters | VFD-VJ
4-27
Appropriate Kd value
Kd value is too low
Kd value is too high
Minimum pressure
Control mode
VF FOCPG FOCPM
Factory setting: 0.1
Settings 0.0～100.0%
Set the minimum pressure value 100% corresponding to Pr.00-08
Maintain a minimum pressure to ensure that the oil pipe is in fully filled condition to avoid the activation delay
of the cylinder when a pressure/flow command is activated.
Minimum flow
Control mode
VF FOCPG FOCPM
Factory setting: 5.0
Settings
0.00 ~ 100.00%
The setting at Pr.00-08 is the setting of Pr.00-27 at 100%. The setting at Pr.01-02 is the setting of Pr.00-55
at 100%.
A minimum pressure must be maintain to ensure the oil circuit is full at all to time. This will prevent delay of
oil tank activation when receiving a pressure/ flo
w rate command.
When the pressure command is 0, keep the minimum pressure (Setting value of Pr.00-27).
When the pressure command is below the minimum pressure but over 0.7bar, the hybrid servo drive follows
the pressure command to do control. For example, when the pressure command is 1 bar, the hybrid servo
drive follows this command to keep the pressure at 1 bar.
When the pressure command is lower than 0.7bar, the hybrid servo drive keeps the minimum pressure.
Depressurization speed
Control mode
VF FOCPG FOCPM
Factory setting: 25
Settings 0～100%
Set the highest rotation speed at depressurization. The 100% value is mapped to Pr.01-02 (the maximum
rotation speed of the motor)
Ramp up rate of pressure command
Control mode
VF FOCPG FOCPM
Factory setting: 0
Settings 0~1000ms
Ramp down rate of pressure command
Control mode
VF FOCPG FOCPM
Factory setting: 100
Settings 0~1000ms
Ramp the pressure value for the pressure command to reduce the vibration of the machine.
Set the time required for ramping the pressure from 0 ~the maximum pressure (Pr.00-08).
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