Nanda NA300 Series User Manual And Technical Specifications page 109

NA300 Series Programmable Logic Controller Technical Specifications and User Manual
LED
P
R Green
A Green
F
TX1～TX4 Green
RX1～RX4 Green
ER1～ER4 Yellow
The working state corresponding to the indicator LED is as follows:
P: Power indicator LED.Light up when the module is powered on and off

when powered off.
R: Run indicator LED. When the module is running normal, the green LED

flickers.
running but parameter is unloaded.
A: HIN Active Indicator LED. When HIN works normally, the LED is on，or it

turns off.
F: Fault Indicator LED. The LED is light when the module is fault.

Tx1～Tx4：Data transmission indicating light for four serial ports (COM1～

COM4). The corresponding "Tx" lamp is on when the serial port is sending
data.
Rx1 ～ Rx4 ： Data receiving indicating lights for four serial ports (COM1 ～

COM4). The corresponding "Rx" lamp is on when the serial port is receiving
data.
Color
Blue Light/ off
Flicker/ Constant
Lighting
Light/ off
Red Light/ off
Light/ off
Light/ off
Light/ off
If the green LED is always on, that means program has been
State
Power on / off
Run normally/ program is running but
parameters are not loaded
HIN work normally/ abnormally
Fault/ Running normally
Serial port is sending data/No Data is
sending
Serial port is receiving data/No Data is
receiving
Serial port is faulty/ normal
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Function