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1-5 Operation
1-5-1 Checking before Operation
Check the following items after completion of installation and wir-
ing:
1, 2, 3...
1. No fault in wiring. Especially, the power supply is connected to
the output terminals T1 (U), T2 (V), and T3 (W).
2. No short-circuit because of wiring contamination (dust, oil,
etc.).
3. Screws and terminals are not loosened. Wiring is provided
properly.
4. Load status is good.
For safe operation, before operation, the motor must be able to op-
erate alone by separating it from the coupling or belt which con-
nects the motor and machine.
When the motor is operated with the machine directly connected,
pay close attention.
1-5-2 Operation Method
The inverter can be operated in the following two methods.
The inverter is operated by frequency setter, operation switches,
etc. connected to the external terminals.
Prior to shipping, the initial setting mode is “operation by external
terminal”. After completion of external terminal wiring, operation
can be started. Therefore, even without the digital operator, opera-
tion can be performed.
Each set value such as accel/decel time is set to a value indicated
in page 46 at the factory. To change this value, the digital operator
must be connected.
The following will be available by connecting the digital operator
when the inverter is operated by external terminal:
•Monitoring of output frequency and output current
•Reading and changing of each constant set value
•Checking of the contents at fault occurrence
•Checking of the operation status (FWD/REV run)
Output frequency or output current is displayed in the digital dis-
play section.
IM
3G3SV
Power supply
Inverter
Motor
FWD signal
REV signal
Freq. setter
no-01 = xx00
Operation by External
Terminal Input
Section 1-5
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