Hitachi SJ-EN Ethernet Communications, Инструкция по эксплуатации

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Chapter 2
User Interface
The SJ-EN has six LEDs to convey module status and activity.
Four LEDs next to the RJ45 connector:
•
STATUS (GREEN) – This LED will be ON whenever the SJ-EN is receiving proper power from the
inverter and the self diagnostics have shown the board to be functioning normally.
•
LINK (GREEN) – This LED is ON when the SJ-EN is receiving valid Ethernet pulses.
•
ACTIVITY (GREEN) – This LED is ON whenever there is Ethernet traffic in the cable.
•
ERROR (RED) – This LED will be ON if the SJ-EN has failed due to a hardware watchdog timeout, or
the Ethernet communications has been absent for the software watchdog timeout period.
Two LEDs near the right edge of the board:
•
TXD – This LED indicates communication from the SJ-EN to the inverter through the option port.
•
RXD – This LED indicates communication to the SJ-EN from the inverter through the option port.
(These two LEDs may appear blinking or may appear steady ON due to the high blink rate.)
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