2–29

SJ300 Inverter

Monitoring Parameters with the Display

After using the keypad for parameter editing, it’s a good idea to switch the inverter from Program Mode to Monitor Mode. This will turn out the PRG LED, and the Hertz, Volt, Ampere, or % LED indicates the display units.

 

HITACHI

POWER

 

ALARM

RUN

 

5 0.0

HZ

 

PRG

 

A

 

 

 

 

V

kW

 

 

 

 

 

 

 

%

 

RUN

 

STOP

 

 

 

RESET

 

 

 

 

MIN

 

MAX

FUNC.

1

2

STR

 

 

 

 

 

For the powerup test, monitor the motor speed indirectly by viewing the inverter’s output frequency. The output frequency must not be confused with base frequency (50/60 Hz) of the motor, or the carrier frequency (switching frequency of the inverter, in the kHz range). The monitoring functions are in the “D” list, located near the top left of the diagram in the “Keypad Navigational Map” on page 2–25.

Output frequency (speed) monitor - Resuming the keypad programming from the previous table, follow the steps in the table below.

 

Action

Display

Func./Parameter

 

 

 

 

 

 

 

 

Press the FUNC.

key.

H – – –

“H” Group selected

 

 

 

Press the 1

key.

d 0 0 1

Output frequency selected

 

 

 

 

 

 

 

Press the FUNC.

key.

0.00

Output frequency displayed

 

 

 

 

 

 

 

Running the Motor

When the d001 function code appeared, the PRG LED went OFF. This confirms the inverter is no longer in programming mode, even while you are selecting the particular monitoring param- eter. After pressing the FUNC. key, the display shows the current speed (is zero at this point).

If you have programmed all the parameters up to this point, you’re ready to run the motor! First, review this checklist:

1.Verify the Power LED is ON. If not, check the power connections.

2.Verify the Run Key Enable LED is ON. If not, review the programming steps to find the problem.

3.Verify the PRG LED is OFF. If it is ON, review the instructions above.

4.Make sure the motor is disconnected from any mechanical load.

5.Turn the potentiometer to the MIN position (completely counterclockwise).

6.Now, press the RUN key on the keypad. The RUN LED will turn ON.

7.Slowly increase the potentiometer setting in clockwise fashion. The motor should start turning when the indicator is in the 9:00 position and beyond.

8.Press the STOP key to stop the motor rotation.