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User Manual

EM303A General Purpose Inverter

interval. Meanwhile, if speed search is active, inverter will automatically detect

motor speed and direction to make it return the setting input frequency smoothly.

1.2.15 Multi-function Numeric Input Terminals

7 multi-function numeric input terminals X1 ～ X7 of EM303A can be

programmed based on real needs.

1.2.16 Multi-function Analog Output Terminals

Multi-function analog output terminals M0～M1 of EM303A can be defined as

different information, or as signals of 0～10V or 0～20mA.

1.2.17 Multi-function Numeric Output Terminals

The output of multi-function numeric output terminals Y1 and Y2, and relays of

EM303A can be programmed based on real needs.

1.2.18 Autotuning Motor Parameter

When autotuning motor parameters is enabled, the inverter will autotune and save

the motor parameters. (Autotuning motor parameter is categorized as stationary

autotuning and rotational autotuning. Please make motor in idling status by

separating motor and load if taking rotational autotuning mode. )

1.2.19 Parameter Copy

All function parameters of EM303A can be copied through keypad.

1.2.20 Programmable Displayed Information

Monitoring codes C0-00～ C0-31 of EM303A can be displayed by setting

program.

1.2.21 RS-485 Interface

Through RS-485 interface and computer monitoring software, multi-inverter

operation can be easily achieved with computer network.

1.2.22 User Password

User can set password to protect function codes from unauthorized editing.

1.2.23 Overmodulated Output

When the load is heavy, overmodulation can raise the output voltage of inverter

and lower motor current, and then lower motor temperature rising.

1.2.24 Oscillation Suppression

Mechanical load may have mechanical resonance point, and motor may have

electromagnetic resonance point. Oscillation suppression can eliminate resonance

and enable system to operate stably and to be free from failures.

1.3 EM303A Operation Status Definition

1.3.1 Operation Status of Inverter

z Parameters setting status: After power is on, inverter finishes initialization

enters standby status without fault or start-up command, and does not output.

z Normal running status: After receiving active start command through

keypad, control terminal or RS485, the inverter drives motor in accordance

Sinee EM303A-2R2G/3R0P-3CB User Manual

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