PIM00587
EN-77
The Parameters related to adjustment of pressure response are shown in the table below.
Panel
Indication
Name
Operation
Range
Default
Value
Unit
P58
Load
Volume
Setting
0 - 18
3
-
This is the control gain for adjusting the response of PQ control.
The pressure response can be adjusted in accordance with the
load capacity of e.g. a hose. It is enabled when “P59: NO_S PQ
control method selection” is set to 1: Control B.
P59
PQ control
method
selection
0 : control A
1 : control B
0 : control A
-
Switches the PQ control method.
Control A
This is the specification for general use.
Normally, select this option.
Control B
This is the specification for case-by-case
correspondence. Select this option when
the pressure response needs to be adjusted
in accordance with the hydraulic circuit.
The settings are brought into effect by turning the power off
and then back on.
CAUTION
It is necessary to turn the power on again after setting
“
P59: PQ control method selection
”
setting
change.
Be sure to set
“
P58: Load volume setting
”
to the factory default value before changing
“
P59: PQ control
method selection
”
to control B. If it is set to an excessive value, the machine may vibrate.
The proper value of each parameter affecting the response varies depending on the characteristics of
the hose and the customer
’
s hydraulic circuit, so it may deviate from the criterion value.
If parameter is set to an excessive value, pressure control becomes unstable and the machine vibrates.
Adjust to the value which operates stably while checking vibration and pressure of hose.
If the hose length from the discharge part of the hydraulic unit to the load is 1m or less, vibration may
occur even if
“
P58: Load volume setting
”
is set to 0. In that case, increasing the volume of the hose,
such as lengthening the hose, stabilizes the pressure.
