Hitachi SJ/L-EN Ethernet Communications Module, Instruction Manual

Page: 11 / 36

Chapter2
Page 11 of 36
User Interface
The SJ/L-EN has seven LEDs to convey module status and activity.
Four LEDs next to the RJ45 connector:
•
STATUS
(GREEN)
–
This LED will be ON whenever the SJ/L-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/L-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/L-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:
•
RTS –
This LED indicates communication between the SJ/L-EN to the inverter through the serial port.
•
TXD –
This LED indicates communication from the SJ/L-EN to the inverter through the serial port.
•
RXD –
This LED indicates communication to the SJ/L-EN from the inverter through the serial port.
(All three of these LEDs should be rapidly blinking; if not, there may be a problem with the connection.)