Nanda NA300 Series User Manual And Technical Specifications page 48

NA300 Series Programmable Logic Controller Technical Specifications and User Manual
Description of indicator LEDs:
LED
P Blue
R Green
A Green
F Red
Indicator
Green
Light 1-16
The working state corresponding to the indicator LED is as follows:
P: Power Indicator LED. The LED is on when the module is powered on . The

LED will go off when the module is powered off.
R: Run Indicator LED. When the module is running normal, the green LED

flickers.
but parameter is unloaded.
A: Communication Indicator LED. When CPU module can communicate

normally with other modules through HIN, the LED is on.
F: Fault Indicator LED.

will go off when everything is normal.
1-16 Channel Indicator LED: Every green light shows state of one input signal.

For digital input module, when the light is on, it means the current state of the
Color State
Constant Lighting/
off
Flicker/Constant
Lighting
Constant Lighting /
off
Light / off
Light / off
If the green LED is always on, that means program has been running
Indicator LEDS
Power on/off
Run normally/run but parameters are not
loaded
HIN work normally/ abnormally
Fault/ Running normal
Current state of input is 1/ Current state of
input is 0
The LED is on when the module has fault.
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Meaning
The LED