Chapter 3. Machine Adjustment Procedure | VFD-VJ
3-15
Gradually increase the rotation speed
Confirm the operation direction of the pump
Make sure that the direction valve is in the close state
If the pressure value > 0
Make sure the multi-function display on the keypad panel shows the voltage indicating the
same pressure as the pressure gauge
Example: If the pressure sensors indicates 250bar at 10V, when the pressure gauge shows 50
bar, the pressure sensor output voltage should be around 50/250 * 10 = 2V, and the
voltage shown on the keypad panel should be 20.0 (%)
Observe if there is oil leakage.
Step 4. Confirm the pressure command and flow command
Pr. 00-09 = 1 for pressure control mode
Pressure control mode
Setting value
of Pr.00-09
0: Speed control
1: Pressure control
Pr. 00-04 = 12 PI for input voltage
Selection of multi-function display
Setting value
of Pr.00-04
12: display the signal value of the analog input terminal PI with 0~10V
mapped to 0~100%
Pr. 00-07 = related pressure value of the pressure command at 10V
Maximum pressure command
Setting value
of Pr.00-07
0~250 bar
Send the maximum pressure command through the controller and then check the
multi-function display page to enter this value into Pr. 00-14
Send a half pressure command through the controller and then check the multi-function
display page to enter this value into Pr. 00-15
Send the minimum pressure command through the controller and then check the multi-function
display page to enter this value into Pr. 00-16
Example: The 0~10V of the PS input terminal map to the 0~250Bar of the pressure sensor. If the
maximum pressure on the controller of a machinery is 140Bar and corresponds to 10V, then Pr.
00-07=140. Now, set the pressure as 140Bar through the controller, the voltage value shown on the
display is 5.6 = 10x (140/ 250). Input this value to the Pr. 00-14.
Then set the pressure as 70bar on the controller, and now the voltage value displayed on the keypad
panel is about 2.8 = 10x (70/250). Input this value to the Pr. 00-15.
Then set the pressure as 0 bar on the controller, and the voltage value shown on the display is 0.0 =
10x (0/250). Input this value in the Pr.00-16.
Set Pr.00-04 = 25 for QI input voltage
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