User Manual
EM303B General Purpose Inverter
50
stably, no unexpected vibration or odd smell.
3.
Turn off the power immediately if anything unexpected.
On-load Trial Operation Check
1. If idling check is normal, connect the drive system to load.
2. Turn on the inverter by terminal or keypad, increase load directly, and
monitoring the operation of system when connected to load.
3. Turn off the power immediately if anything unexpected.
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Basic Operation
Inverter can conduct basic operation such as normal start, operation,
stop,forward/reverse, and etc. Otherwise, please check if input and start/stop
function codesare accurately set.
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Speed
Control
Program
Operation
After setting program operation codes, system can operate in monocycle or
recycle mode. Please check program operation codes if anything unexpected.
PID
Operation
Customer can set PID process control channel and PID regulator parameters to
control industrial process according to the drive system demand.
Torque Control
Control the output torque based on the input torque command value.
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Speed Search
The inverter will automatically detect motor’s rotational status at start, and
switch to operation smoothly to reduce start-up shock.
S-Curve
Acceleration/
Deceleration
Mainly used for the drive system with big inertia and the application which is
sensitive to acceleration, to reduce mechanical shock and avoid system
vibration.
DC Brake
Input DC current to the running motor to generate brake torque before start-up
or at stop, it makes the motor stop quickly.
Special Terminal
Control
EM303B provides multiple programmable input/output terminals which can
connect external controller to satisfy various applications.
5.2
Trial Operation Precautions
5.2.1
Turningon the Power
Checks before power-on:
Voltage of power supply:3-phase 380VAC, 50Hz
Connect the input power supply cable to the input terminals R,S, and T of inverter
Connect the output terminals U, V, and W of inverter to the input terminals of motor
All control circuit terminals are connected to correct control device, and terminals shall
be off.
Motor is idling.
Turn the power on after all above settings have been confirmed.
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are the output terminals of inverter’s DC bus voltage,
is ground terminal,
PB is wiring terminal of braking resistor. Any damage resulted from incorrect wiring
shall not in warranty.
5.2.2
Check at Power-on
After the inverter starts up, the present working status and parameters will be displayed on
the keypad. See Chapter 9 if anything unexpected displayed on keypad.
5.2.3
Idling Operation
When motor is idling without mechanical load, the inverter is in keypad or terminal control
mode, try to run the motor. The idling trial operation procedures as shown in followings:
